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Archive for the ‘Visual Studio’ Category

Using BackgroundWorker with WPF

Posted by Viral Sarvaiya on March 26, 2012


When one process take so much long time and UI thread needs to stay responsive while process is running, the most common method to place a long running process on a separate thread.

In WPF there are mostly use technique is  Backgroundworker. Backgroundworker is mostly use in multithreading applications.

Here I show a small example of backgroundworker.

In WPF application I call WCF service function directly not asynchronies, so that function take time get response and at that time user can’t see what happen. so we have to integrate busyindicater while service call.

Busyindicater comes with WPF extended toolkit.

private void OKButton_Click(object sender, RoutedEventArgs e)
{
MyService myservice = new MyService();
MyServiceResponse Myserviceresponce = new MyServiceResponse();
Myserviceresponce = myservice.CallMyFunction(int Para1, string para2);
}

here when user click to OK Button, CallMyFunction() take so much long time and end user confuse what to do at that time and he/she click more than one time to that button and application will crashed.

so we put busy indicator in our code and calling this function asynchronies with backgroundworker.

<extToolkit:BusyIndicator x:Name="_busyIndicator" >
<Grid>
....
</Grid>
</extToolkit:BusyIndicator>

and in CS page

private void OKButton_Click(object sender, RoutedEventArgs e)
{
_busyIndicator.IsBusy = true;

MyServiceResponse Myserviceresponce = new MyServiceResponse();

BackgroundWorker worker = new BackgroundWorker();
worker.RunWorkerAsync();

//this is where the long running process should go
worker.DoWork += (o, ea) =>
{
MyService myservice = new MyService();
Myserviceresponce = myservice.CallMyFunction(int Para1, string para2);
};

worker.RunWorkerCompleted += (o, ea) =>
{
_busyIndicator.IsBusy = false;

//Continue other statment of this function...
};
}

So this will display busyindicator while service call complete.
Hope this will helps you.
Thanks.

Posted in .Net, Visual Studio, WCF Services, WPF | Tagged: , , , , , , , , | 2 Comments »

The “CreateRiaClientFilesTask” task failed unexpectedly

Posted by Viral Sarvaiya on February 14, 2012


Some day ago, when i build my project i get unexpected error.

Error 3 The “CreateRiaClientFilesTask” task failed unexpectedly.
System.Web.HttpException (0x80004005): Could not load file or assembly ‘FileHelpers.DataLink’ or one of its dependencies. Access is denied. —> System.Configuration.ConfigurationErrorsException: Could not load file or assembly ‘FileHelpers.DataLink’ or one of its dependencies. Access is denied. —> System.IO.FileLoadException: Could not load file or assembly ‘FileHelpers.DataLink’ or one of its dependencies. Access is denied……….

Sometime that happen when Visual studio cannot access files. so have to remove Temporary file.

I get simple solution from goggling, just close visual studio and reopen, and if Visual studio has no administrator rights then please right click to visual studio icon and choose “Run as a Administrator”.

Then re-build project and problem solved.

Thanks.

Posted in .Net, ASP.NET, RIA WCF, Silverlight, Visual Studio, WCF Services, WPF | Tagged: , , , , , | 4 Comments »

Get Silverlight XAP and Hosting Page URL

Posted by Viral Sarvaiya on December 5, 2011


Get the URL to the current xap file:
App.Current.Host.Source.AbsoluteUri

Sample:
http://www.WebsiteName.com/ClientBin/SilverlightApplicationName.xap

Get the full URL of the page hosting the xap (with QueryStrings):
HtmlPage.Document.DocumentUri.ToString()

Sample:
http://www.WebsiteName.com/SilverlightApplicationName.aspx?param=1

Posted in .Net, ASP.NET, Silverlight, Visual Studio | Tagged: , , , , , | Leave a Comment »

Check printer status in .net

Posted by Viral Sarvaiya on August 1, 2011


Hi

Today i get new thing from my current projet, how to check the status of the printer means wether the printer is connected to PC or not.

For that we have to add reference of the “System.Management”

Here it is code for check status of the printer.


using System.Management;

class PrinterOffline
{
private static void Main(string[] args)
{
// Set management scope
ManagementScope scope = new ManagementScope("\\root\\cimv2");
scope.Connect();
// Select Printers from WMI Object Collections
ManagementObjectSearcher searcher = new ManagementObjectSearcher("SELECT * FROM Win32_Printer");
string printerName = "";
foreach (ManagementObject printer in searcher.Get()) {
printerName = printer("Name").ToString().ToLower();
if (printerName.Equals("Name_Of_Printer")) {
Console.WriteLine("Printer = " + printer("Name"));
if (printer("WorkOffline").ToString().ToLower().Equals("true")) {
// printer is offline by user
Console.WriteLine("Your Plug-N-Play printer is not connected.");
} else {
// printer is not offline
Console.WriteLine("Your Plug-N-Play printer is connected.");
}
}
}
}
}

 

thanks and enjoy coding…

Posted in .Net, ASP.NET, asp.net feature, Visual Studio, WPF | Tagged: , , , , , , , | 6 Comments »

Multilanguage Application in WPF

Posted by Viral Sarvaiya on May 7, 2011


From this 2 link we can get batter idea of Globalization and Localization,

http://msdn.microsoft.com/en-us/library/ms752337.aspx

http://msdn.microsoft.com/en-us/library/ms788718.aspx

Here i demostrate very simple way for multiple language application in WPF.

here i make a simple login form in wpf with 2 language English and French Button.
Step 1:  Open Visual studion, Create New Project of WPF give name “WPFMultiLanguage”.

so now you have 2 .xaml file App.xaml and MainWindow.xaml,

Step 2: New we add new folder named “Resources” for Multiple Language.

Step 3: Add resource files

To add resource file named “StringResources.xaml”, right click to Resource folder => Add => Resource Directory (See Image below)

So your file is as like

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" >

</ResourceDictionary>

I have added one namespace which points to mscorlib, and named it as system and now add resource string to StringResources.xaml

so StringResources.xaml as below

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:system="clr-namespace:System;assembly=mscorlib">

<system:String x:Key="Username">Username</system:String>
<system:String x:Key="Password">Password</system:String>
<system:String x:Key="close">close</system:String>
<system:String x:Key="login">login</system:String>
<system:String x:Key="French">French</system:String>
<system:String x:Key="English">English</system:String>

</ResourceDictionary>

Now add another resource directory for French language named “StringResource.fr-CA.xaml”

put there French string resuouce and give same key name as per above file,

so StringResource.fr-CA.xaml as below.

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:system="clr-namespace:System;assembly=mscorlib">

<system:String x:Key="Username">Nom d'utilisateur</system:String>
<system:String x:Key="Password">Mot de passe</system:String>
<system:String x:Key="close">Fermer</system:String>
<system:String x:Key="login">connexion</system:String>
<system:String x:Key="French">Française</system:String>
<system:String x:Key="English">En anglais</system:String>

</ResourceDictionary>

Step 4: Add Resource file to window.

Now its time to add resource file to Mainwindow page.

for that in the MainWindow.xaml file design the login page and put 2 button for the language transfer.

For display content and text from resource file, use DynamicResource.

for that i have made 1 function that add dictionaries directly to window resources and in click event of the button for language transfer i set culture for that.

so MainWindow.xaml as below.

<Window x:Class="WPFMultiLanguage.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525">
<Grid Background="Beige" >
<Grid.ColumnDefinitions>
<ColumnDefinition></ColumnDefinition>
<ColumnDefinition></ColumnDefinition>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition></RowDefinition>
<RowDefinition></RowDefinition>
<RowDefinition></RowDefinition>
<RowDefinition></RowDefinition>
</Grid.RowDefinitions>

<TextBlock Name="Username" Text="{DynamicResource Username}" VerticalAlignment="Center" HorizontalAlignment="Right" Margin="0,24,18,38"></TextBlock>
<TextBox Name="txtuser" Width="100" Height="30" Grid.Column="1" Grid.Row="0" VerticalAlignment="Center" HorizontalAlignment="Left"></TextBox>
<TextBlock Name="Password" Text="{DynamicResource Password}" Grid.Column="0" Margin="0,24,18,38" Grid.Row="1" VerticalAlignment="Center" HorizontalAlignment="Right"></TextBlock>
<PasswordBox Name="txtpass" Width="100" Height="30" Grid.Column="1" Grid.Row="1" HorizontalAlignment="Left" VerticalAlignment="Center" />

<Button x:Name="btnLogin" Width="100" Height="40" VerticalAlignment="Top" HorizontalAlignment="Right"
Click="btnLogin_Click" Content="{DynamicResource login}" Grid.Row="2" Grid.Column="0" Padding="10" />
<Button x:Name="btnClose" Width="100" Height="40" VerticalAlignment="Top" HorizontalAlignment="Left"
Click="btnClose_Click" Content="{DynamicResource close}" Grid.Row="2" Grid.Column="1" Padding="10" />

<Button x:Name="btnEnglish" Width="100" Height="40" VerticalAlignment="Bottom" HorizontalAlignment="Right"
Click="btnEnglish_Click" Content="{DynamicResource English}" Grid.Row="3" Grid.Column="0" Padding="10" />

<Button x:Name="btnFrench" Width="100" Height="40" VerticalAlignment="Bottom" HorizontalAlignment="Left"
Click="btnFrench_Click" Content="{DynamicResource French}" Grid.Row="3" Grid.Column="1" Padding="10" />
</Grid>
</Window>

and MainWindow.xaml.cs as below.


using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

using System.Threading;
namespace WPFMultiLanguage
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
SetLanguageDictionary();
}

private void SetLanguageDictionary()
{
ResourceDictionary dict = new ResourceDictionary();
switch (Thread.CurrentThread.CurrentCulture.ToString())
{
case "en-US":
dict.Source = new Uri("..\\Resources\\StringResources.xaml", UriKind.Relative);
break;
case "fr-CA":
dict.Source = new Uri("..\\Resources\\StringResource.fr-CA.xaml", UriKind.Relative);
break;
default:
dict.Source = new Uri("..\\Resources\\StringResources.xaml", UriKind.Relative);
break;
}
this.Resources.MergedDictionaries.Add(dict);
}

private void btnLogin_Click(object sender, RoutedEventArgs e)
{
if (txtuser.Text.Trim() == "")
{
MessageBox.Show("Please Enter Username");
//If u want to set resource from code behind then use below code
//FindResource("<Resource Key Name>").ToString()
return;
}
if (txtpass.Password.Trim() == "")
{
MessageBox.Show("Please Enter Password");
return;
}
if (txtuser.Text.Trim() == txtpass.Password.Trim())
{
MessageBox.Show("Sucess");
}

}

private void btnClose_Click(object sender, RoutedEventArgs e)
{
this.Close();
}

private void btnEnglish_Click(object sender, RoutedEventArgs e)
{
System.Globalization.CultureInfo cultureInfo = new System.Globalization.CultureInfo("en-US");
Thread.CurrentThread.CurrentCulture = cultureInfo;
SetLanguageDictionary();
}

private void btnFrench_Click(object sender, RoutedEventArgs e)
{
System.Globalization.CultureInfo cultureInfo = new System.Globalization.CultureInfo("fr-CA");
Thread.CurrentThread.CurrentCulture = cultureInfo;
SetLanguageDictionary();
}
}
}

Now run the solution

english is by default so first time when you run code it display in english language
and then click to French button it display in French.

Enjoy…..

Posted in .Net, Silverlight, Visual Studio, WPF | Tagged: , , , , , | 4 Comments »

Comparison of VB and C#

Posted by Viral Sarvaiya on January 12, 2011


VB.NET Program Structure C#
 

Imports System

Namespace Hello
Class HelloWorld
Overloads Shared Sub Main(ByVal args() As String)
Dim name As String = “VB.NET”

‘See if an argument was passed from the command line
If args.Length = 1 Then name = args(0)

Console.WriteLine(“Hello, ” & name & “!”)
End Sub
End Class
End Namespace

 

using System;

namespace Hello {
public class HelloWorld {
public static void Main(string[] args) {
string name = “C#”;

// See if an argument was passed from the command line
if (args.Length == 1)
name = args[0];

Console.WriteLine(“Hello, ” + name + “!”);
}
}
}

VB.NET Comments C#
 

‘ Single line only
REM Single line only
”’ <summary>XML comments</summary>

 

// Single line
/* Multiple
line  */
/// <summary>XML comments on single line</summary>
/** <summary>XML comments on multiple lines</summary> */

VB.NET Data Types C#
Value Types
Boolean
Byte, SByte
Char
Short, UShort, Integer, UInteger, Long, ULong
Single, Double
Decimal
Date   (alias of System.DateTime)

Reference Types
Object
String

Initializing
Dim correct As Boolean = True
Dim b As Byte = &H2A   ‘hex or &O52 for octal
Dim person As Object = Nothing
Dim name As String = “Dwight”
Dim grade As Char = “B”c
Dim today As Date = #12/31/2010 12:15:00 PM#
Dim amount As Decimal = 35.99@
Dim gpa As Single = 2.9!
Dim pi As Double = 3.14159265
Dim lTotal As Long = 123456L
Dim sTotal As Short = 123S
Dim usTotal As UShort = 123US
Dim uiTotal As UInteger = 123UI
Dim ulTotal As ULong = 123UL

Implicitly Typed Local Variables
Dim s = “Hello!”
Dim nums = New Integer() {1, 2, 3}
Dim hero = New SuperHero With {.Name = “Batman”}

Type Information
Dim x As Integer
Console.WriteLine(x.GetType())          ‘ Prints System.Int32
Console.WriteLine(GetType(Integer))   ‘ Prints System.Int32
Console.WriteLine(TypeName(x))        ‘ Prints Integer

Dim c as New Circle
If TypeOf c Is Shape Then _
Console.WriteLine(“c is a Shape”)

Type Conversion / Casting
Dim d As Single = 3.5
Dim i As Integer = CType(d, Integer)   ‘ set to 4 (Banker’s rounding)
i = CInt(d)  ‘ same result as CType
i = Int(d)    ‘ set to 3 (Int function truncates the decimal)

Dim o As Object = 2
i = DirectCast(o, Integer)   ‘ Throws InvalidCastException if type cast fails

Dim s As New Shape
Dim c As Circle = TryCast(s, Circle)         ‘Returns Nothing if type cast fails

Value Types
bool
byte, sbyte
char
short, ushort, int, uint, long, ulong
float, double
decimal
DateTime   (not a built-in C# type)

Reference Types
object
string

Initializing
bool correct = true;
byte b = 0x2A;   // hex
object person = null;
string name = “Dwight”;
char grade = ‘B’;
DateTime today = DateTime.Parse(“12/31/2010 12:15:00 PM”);
decimal amount = 35.99m;
float gpa = 2.9f;
double pi = 3.14159265;
long lTotal = 123456L;
short sTotal = 123;
ushort usTotal = 123;
uint uiTotal = 123;
ulong ulTotal = 123;

Implicitly Typed Local Variables
var s = “Hello!”;
var nums = new int[] { 1, 2, 3 };
var hero = new SuperHero() { Name = “Batman” };

Type Information
int x;
Console.WriteLine(x.GetType());              // Prints System.Int32
Console.WriteLine(typeof(int));               // Prints System.Int32
Console.WriteLine(x.GetType().Name);   // prints Int32

Circle c = new Circle();
if (c is Shape)
Console.WriteLine(“c is a Shape”);

Type Conversion / Casting
float d = 3.5f;
i = Convert.ToInt32(d);     // Set to 4 (rounds)
int i = (int)d;     // set to 3 (truncates decimal)

object o = 2;
int i = (int)o;   // Throws InvalidCastException if type cast fails

Shape s = new Shape();
Circle c = s as Circle;   // Returns null if type cast fails

VB.NET Constants C#
 

Const MAX_STUDENTS As Integer = 25

‘ Can set to a const or var; may be initialized in a constructor
ReadOnly MIN_DIAMETER As Single = 4.93

 

const int MAX_STUDENTS = 25;

// Can set to a const or var; may be initialized in a constructor
readonly float MIN_DIAMETER = 4.93f;

VB.NET Enumerations C#

Enum Action
Start
[Stop]   ‘ Stop is a reserved word
Rewind
Forward
End Enum

Enum Status
Flunk = 50
Pass = 70
Excel = 90
End Enum

Dim a As Action = Action.Stop
If a <> Action.Start Then _
Console.WriteLine(a.ToString & ” is ” & a)     ‘ Prints “Stop is 1”

Console.WriteLine(Status.Pass)     ‘ Prints 70
Console.WriteLine(Status.Pass.ToString())     ‘ Prints Pass

 

enum Action {Start, Stop, Rewind, Forward};
enum Status {Flunk = 50, Pass = 70, Excel = 90};

Action a = Action.Stop;
if (a != Action.Start)
Console.WriteLine(a + ” is ” + (int) a);    // Prints “Stop is 1”

Console.WriteLine((int) Status.Pass);    // Prints 70
Console.WriteLine(Status.Pass);      // Prints Pass

VB.NET Operators C#
 

Comparison
=  <  >  <=  >=  <>

Arithmetic
+  –  *  /
Mod
\  (integer division)
^  (raise to a power)

Assignment
=  +=  -=  *=  /=  \=  ^=  <<=  >>=  &=

Bitwise
And   Or   Xor   Not   <<   >>

Logical
AndAlso   OrElse   And   Or   Xor   Not

Note: AndAlso and OrElse perform short-circuit logical evaluations

String Concatenation
&

 

Comparison
==  <  >  <=  >=  !=

Arithmetic
+  –  *  /
%  (mod)
/  (integer division if both operands are ints)
Math.Pow(x, y)

Assignment
=  +=  -=  *=  /=   %=  &=  |=  ^=  <<=  >>=  ++  —

Bitwise
&   |   ^   ~   <<   >>

Logical
&&   ||   &   |   ^   !

Note: && and || perform short-circuit logical evaluations

String Concatenation
+

VB.NET Conditions C#
 

‘ Ternary/Conditional operator (Iff evaluates 2nd and 3rd expressions)
greeting = If(age < 20, “What’s up?”, “Hello”)

‘ One line doesn’t require “End If”
If age < 20 Then greeting = “What’s up?”
If age < 20 Then greeting = “What’s up?” Else greeting = “Hello”

‘ Use : to put two commands on same line
If x <> 100 AndAlso y < 5 Then x *= 5 : y *= 2

‘ Preferred
If x <> 100 AndAlso y < 5 Then
x *= 5
y *= 2
End If

‘ Use _ to break up long single line or implicit line break
If whenYouHaveAReally < longLine And
itNeedsToBeBrokenInto2 > Lines Then _
UseTheUnderscore(charToBreakItUp)

If x > 5 Then
x *= y
ElseIf x = 5 OrElse y Mod 2 = 0 Then
x += y
ElseIf x < 10 Then
x -= y
Else
x /= y
End If

Select Case color   ‘ Must be a primitive data type
Case “pink”, “red”
r += 1
Case “blue”
b += 1
Case “green”
g += 1
Case Else
other += 1
End Select

 

// Ternary/Conditional operator
greeting = age < 20 ? “What’s up?” : “Hello”;

if (age < 20)
greeting = “What’s up?”;
else
greeting = “Hello”;

// Multiple statements must be enclosed in {}
if (x != 100 && y < 5) {
x *= 5;
y *= 2;
}

 

//No need for _ or : since ; is used to terminate each statement.


if
(x > 5)
x *= y;
else if (x == 5 || y % 2 == 0)
x += y;
else if (x < 10)
x -= y;
else
x /= y;

// Every case must end with break or goto case
switch (color) {                          // Must be integer or string
case “pink”:
case “red”:    r++;    break;
case “blue”:   b++;   break;
case “green”: g++;   break;
default: other++;   break; // break necessary on default
}

VB.NET Loops C#
Pre-test Loops:
While c < 10
c += 1
End While
Do Until c = 10
c += 1
Loop
Do While c < 10
c += 1
Loop
For c = 2 To 10 Step 2
Console.WriteLine(c)
Next
Post-test Loops:
Do
c += 1
Loop While c < 10
Do
c += 1
Loop Until c = 10

‘  Array or collection looping
Dim names As String() = {“Fred”, “Sue”, “Barney”}
For Each s As String In names
Console.WriteLine(s)
Next

‘ Breaking out of loops
Dim i As Integer = 0
While (True)
If (i = 5) Then Exit While
i += 1
End While

‘ Continue to next iteration
For i = 0 To 4
If i < 4 Then Continue For
Console.WriteLine(i)   ‘ Only prints 4
Next

 

Pre-test Loops:

// no “until” keyword
while (c < 10)
c++;

for (c = 2; c <= 10; c += 2)
Console.WriteLine(c);
Post-test Loop:

do
c++;
while (c < 10);

// Array or collection looping
string[] names = {“Fred”, “Sue”, “Barney”};
foreach (string s in names)
Console.WriteLine(s);
// Breaking out of loops
int i = 0;
while (true) {
if (i == 5)
break;
i++;
}

// Continue to next iteration
for (i = 0; i <= 4; i++) {
if (i < 4)
continue;
Console.WriteLine(i);   // Only prints 4
}

VB.NET Arrays C#
Dim nums() As Integer = {1, 2, 3}
For i As Integer = 0 To nums.Length – 1
Console.WriteLine(nums(i))
Next

‘ 4 is the index of the last element, so it holds 5 elements
Dim names(4) As String
names(0) = “David”
names(5) = “Bobby”  ‘ Throws System.IndexOutOfRangeException

‘ Resize the array, keeping the existing values (Preserve is optional)
ReDim Preserve names(6)

Dim twoD(rows-1, cols-1) As Single
twoD(2, 0) = 4.5

Dim jagged()() As Integer = { _
New Integer(4) {}, New Integer(1) {}, New Integer(2) {} }
jagged(0)(4) = 5

 

int[] nums = {1, 2, 3};
for (int i = 0; i < nums.Length; i++)
Console.WriteLine(nums[i]);

// 5 is the size of the array
string[] names = new string[5];
names[0] = “David”;
names[5] = “Bobby”;   // Throws System.IndexOutOfRangeException

// C# can’t dynamically resize an array.  Just copy into new array.
string[] names2 = new string[7];
Array.Copy(names, names2, names.Length);   // or names.CopyTo(names2, 0);

float[,] twoD = new float[rows, cols];
twoD[2,0] = 4.5f;

int[][] jagged = new int[3][] {
new int[5], new int[2], new int[3] };
jagged[0][4] = 5;

VB.NET Functions C#
‘ Pass by value (in, default), reference (in/out), and reference (out)
Sub TestFunc(ByVal x As Integer, ByRef y As Integer, ByRef z As Integer)
x += 1
y += 1
z = 5
End Sub

Dim a = 1, b = 1, c As Integer   ‘ c set to zero by default
TestFunc(a, b, c)
Console.WriteLine(“{0} {1} {2}”, a, b, c)   ‘ 1 2 5

‘ Accept variable number of arguments
Function Sum(ByVal ParamArray nums As Integer()) As Integer
Sum = 0
For Each i As Integer In nums
Sum += i
Next
End Function ‘ Or use Return statement like C#

Dim total As Integer = Sum(4, 3, 2, 1)   ‘ returns 10

‘ Optional parameters must be listed last and must have a default value
Sub SayHello(ByVal name As String, Optional ByVal prefix As String = “”)
Console.WriteLine(“Greetings, ” & prefix & ” ” & name)
End Sub

SayHello(“Strangelove”, “Dr.”)
SayHello(“Mom”)

 

// Pass by value (in, default), reference (in/out), and reference (out)
void TestFunc(int x, ref int y, out int z) {
x++;
y++;
z = 5;
}

int a = 1, b = 1, c;  // c doesn’t need initializing
TestFunc(a, ref b, out c);
Console.WriteLine(“{0} {1} {2}”, a, b, c);  // 1 2 5

// Accept variable number of arguments
int Sum(params int[] nums) {
int sum = 0;
foreach (int i in nums)
sum += i;
return sum;
}

int total = Sum(4, 3, 2, 1);   // returns 10

/* C# 4.0 supports optional parameters. Previous versions required function overloading. */
void SayHello(string name, string prefix = “”) {
Console.WriteLine(“Greetings, ” + prefix + ” ” + name);
}

SayHello(“Strangelove”, “Dr.”);
SayHello(“Mom”);

VB.NET Strings C#
Special character constants (all also accessible from ControlChars class)
vbCrLf, vbCr, vbLf, vbNewLine
vbNullString
vbTab
vbBack
vbFormFeed
vbVerticalTab
“”

‘ String concatenation (use & or +)
Dim school As String = “Harding” & vbTab
school = school & “University” ‘ school is “Harding (tab) University”

‘ Chars
Dim letter As Char = school.Chars(0)   ‘ letter is H
letter = “Z”c                                         ‘ letter is Z
letter = Convert.ToChar(65)                ‘ letter is A
letter = Chr(65)                                 ‘ same thing
Dim word() As Char = school.ToCharArray() ‘ word holds Harding

‘ No string literal operator
Dim msg As String = “File is c:\temp\x.dat”

‘ String comparison
Dim mascot As String = “Bisons”
If (mascot = “Bisons”) Then   ‘ true
If (mascot.Equals(“Bisons”)) Then   ‘ true
If (mascot.ToUpper().Equals(“BISONS”)) Then  ‘ true
If (mascot.CompareTo(“Bisons”) = 0) Then   ‘ true

‘ String matching with Like – Regex is more powerful
If (“John 3:16” Like “Jo[Hh]? #:*”) Then   ‘true

‘ Substring
s = mascot.Substring(2, 3)) ‘ s is “son”

‘ Replacement
s = mascot.Replace(“sons”, “nomial”)) ‘ s is “Binomial”

‘ Split
Dim names As String = “Michael,Dwight,Jim,Pam”
Dim parts() As String = names.Split(“,”.ToCharArray())   ‘ One name in each slot

‘ Date to string
Dim dt As New DateTime(1973, 10, 12)
Dim s As String = “My birthday: ” & dt.ToString(“MMM dd, yyyy”)   ‘ Oct 12, 1973

‘ Integer to String
Dim x As Integer = 2
Dim y As String = x.ToString()     ‘ y is “2”

‘ String to Integer
Dim x As Integer = Convert.ToInt32(“-5”)     ‘ x is -5

‘ Mutable string
Dim buffer As New System.Text.StringBuilder(“two “)
buffer.Append(“three “)
buffer.Insert(0, “one “)
buffer.Replace(“two”, “TWO”)
Console.WriteLine(buffer)         ‘ Prints “one TWO three”

 

Escape sequences
\r    // carriage-return
\n    // line-feed
\t    // tab
\\    // backslash
\”    // quote

// String concatenation
string school = “Harding\t”;
school = school + “University”;   // school is “Harding (tab) University”

// Chars
char letter = school[0];            // letter is H
letter = ‘Z’;                               // letter is Z
letter = Convert.ToChar(65);     // letter is A
letter = (char)65;                    // same thing
char[] word = school.ToCharArray();   // word holds Harding

// String literal
string msg = @“File is c:\temp\x.dat”;
// same as
string msg = “File is c:\\temp\\x.dat”;

// String comparison
string mascot = “Bisons”;
if (mascot == “Bisons”)    // true
if (mascot.Equals(“Bisons”))   // true
if (mascot.ToUpper().Equals(“BISONS”))   // true
if (mascot.CompareTo(“Bisons”) == 0)    // true

// String matching – No Like equivalent, use Regex
// Substring
s = mascot.Substring(2, 3))     // s is “son”

// Replacement
s = mascot.Replace(“sons”, “nomial”))     // s is “Binomial”

// Split
string names = “Michael,Dwight,Jim,Pam”;
string[] parts = names.Split(“,”.ToCharArray());   // One name in each slot

// Date to string
DateTime dt = new DateTime(1973, 10, 12);
string s = dt.ToString(“MMM dd, yyyy”);     // Oct 12, 1973

// int to string
int x = 2;
string y = x.ToString();     // y is “2”

// string to int
int x = Convert.ToInt32(“-5”);     // x is -5

// Mutable string
System.Text.StringBuilder buffer = new System.Text.StringBuilder(“two “);
buffer.Append(“three “);
buffer.Insert(0, “one “);
buffer.Replace(“two”, “TWO”);
Console.WriteLine(buffer);     // Prints “one TWO three”

VB.NET Regular Expressions C#
Imports System.Text.RegularExpressions

‘ Match a string pattern
Dim r As New Regex(“j[aeiou]h?. \d:*”, RegexOptions.IgnoreCase Or _
RegexOptions.Compiled)
If (r.Match(“John 3:16”).Success) Then   ‘true
Console.WriteLine(“Match”)
End If

‘ Find and remember all matching patterns
Dim s As String = “My number is 305-1881, not 305-1818.”
Dim r As New Regex(“(\d+-\d+)”)
Dim m As Match = r.Match(s)     ‘ Matches 305-1881 and 305-1818
While m.Success
Console.WriteLine(“Found number: ” & m.Groups(1).Value & ” at position ” _
& m.Groups(1).Index.ToString)
m = m.NextMatch()
End While

‘ Remeber multiple parts of matched pattern
Dim r As New Regex(“(\d\d):(\d\d) (am|pm)”)
Dim m As Match = r.Match(“We left at 03:15 pm.”)
If m.Success Then
Console.WriteLine(“Hour: ” & m.Groups(1).ToString)       ‘ 03
Console.WriteLine(“Min: ” & m.Groups(2).ToString)         ‘ 15
Console.WriteLine(“Ending: ” & m.Groups(3).ToString)   ‘ pm
End If

‘ Replace all occurrances of a pattern
Dim r As New Regex(“h\w+?d”, RegexOptions.IgnoreCase)
Dim s As String = r.Replace(“I heard this was HARD!”, “easy”)   ‘ I easy this was easy!

‘ Replace matched patterns
Dim s As String = Regex.Replace(“123 < 456”, “(\d+) . (\d+)”, “$2 > $1”)   ‘ 456 > 123

‘ Split a string based on a pattern
Dim names As String = “Michael, Dwight, Jim, Pam”
Dim r As New Regex(“,\s*”)
Dim parts() As String = r.Split(names)   ‘ One name in each slot

 

using System.Text.RegularExpressions;

// Match a string pattern
Regex r = new Regex(@”j[aeiou]h?. \d:*”, RegexOptions.IgnoreCase |
RegexOptions.Compiled);
if (r.Match(“John 3:16”).Success)   // true
Console.WriteLine(“Match”);
// Find and remember all matching patterns
string s = “My number is 305-1881, not 305-1818.”;
Regex r = new Regex(“(\\d+-\\d+)”);
// Matches 305-1881 and 305-1818
for (Match m = r.Match(s); m.Success; m = m.NextMatch())
Console.WriteLine(“Found number: ” + m.Groups[1] + ” at position ” +
m.Groups[1].Index);

// Remeber multiple parts of matched pattern
Regex r = new Regex(“@(\d\d):(\d\d) (am|pm)”);
Match m = r.Match(“We left at 03:15 pm.”);
if (m.Success) {
Console.WriteLine(“Hour: ” + m.Groups[1]);       // 03
Console.WriteLine(“Min: ” + m.Groups[2]);         // 15
Console.WriteLine(“Ending: ” + m.Groups[3]);   // pm
}

// Replace all occurrances of a pattern
Regex r = new Regex(“h\\w+?d”, RegexOptions.IgnoreCase);
string s = r.Replace(“I heard this was HARD!”, “easy”));   // I easy this was easy!

// Replace matched patterns
string s = Regex.Replace(“123 < 456″, @”(\d+) . (\d+)”, “$2 > $1”);   // 456 > 123

// Split a string based on a pattern
string names = “Michael, Dwight, Jim, Pam”;
Regex r = new Regex(@”,\s*”);
string[] parts = r.Split(names);   // One name in each slot

VB.NET Exception Handling C#
‘ Throw an exception
Dim ex As New Exception(“Something is really wrong.”)
Throw ex

‘ Catch an exception
Try
y = 0
x = 10 / y
Catch ex As Exception When y = 0 ‘ Argument and When is optional
Console.WriteLine(ex.Message)
Finally
Beep()
End Try

‘ Deprecated unstructured error handling
On Error GoTo MyErrorHandler

MyErrorHandler: Console.WriteLine(Err.Description)

 

// Throw an exception
Exception up = new Exception(“Something is really wrong.”);
throw up;  // ha ha

// Catch an exception
try {
y = 0;
x = 10 / y;
}
catch (Exception ex) {   // Argument is optional, no “When” keyword
Console.WriteLine(ex.Message);
}
finally {
Microsoft.VisualBasic.Interaction.Beep();
}

VB.NET Namespaces C#
Namespace Harding.Compsci.Graphics

End Namespace

‘ or

Namespace Harding
Namespace Compsci
Namespace Graphics

End Namespace
End Namespace
End Namespace

Imports Harding.Compsci.Graphics

 

namespace Harding.Compsci.Graphics {

}

// or

namespace Harding {
namespace Compsci {
namespace Graphics {

}
}
}

using Harding.Compsci.Graphics;

VB.NET Classes / Interfaces C#
Access Modifiers
Public
Private
Friend
Protected
Protected Friend

Class Modifiers
MustInherit
NotInheritable

Method Modifiers
MustOverride
NotInheritable
Shared
Overridable

‘ All members are Shared
Module

‘ Partial classes
Partial Class Competition

End Class

‘ Inheritance
Class FootballGame
Inherits Competition

End Class

‘ Interface definition
Interface IAlarmClock
Sub Ring()
Property TriggerDateTime() As DateTime
End Interface

‘ Extending an interface
Interface IAlarmClock
Inherits IClock

End Interface

‘ Interface implementation
Class WristWatch
Implements IAlarmClock, ITimer

Public Sub Ring() Implements IAlarmClock.Ring
Console.WriteLine(“Wake up!”)
End Sub

Public Property TriggerDateTime As DateTime Implements IAlarmClock.TriggerDateTime

End Class

 

Access Modifiers
public
private
internal
protected
protected internal

Class Modifiers
abstract
sealed
static

Method Modifiers
abstract
sealed
static
virtual

No Module equivalent – just use static class

// Partial classes
partial class Competition {

}

// Inheritance
class FootballGame : Competition {

}
// Interface definition
interface IAlarmClock {
void Ring();
DateTime CurrentDateTime { get; set; }
}

// Extending an interface
interface IAlarmClock : IClock {

}
// Interface implementation
class WristWatch : IAlarmClock, ITimer {

public void Ring() {
Console.WriteLine(“Wake up!”);
}

public DateTime TriggerDateTime { get; set; }

}

VB.NET Constructors / Destructors C#
Class SuperHero
Private powerLevel As Integer

Public Sub New()
powerLevel = 0
End Sub

Public Sub New(ByVal powerLevel As Integer)
Me.powerLevel = powerLevel
End Sub

Shared Sub New()
‘ Shared constructor invoked before 1st instance is created
End Sub

Protected Overrides Sub Finalize()
‘ Destructor to free unmanaged resources
MyBase.Finalize()
End Sub
End Class

 

class SuperHero {
private int powerLevel;

public SuperHero() {
powerLevel = 0;
}

public SuperHero(int powerLevel) {
this.powerLevel = powerLevel;
}

static SuperHero() {
// Static constructor invoked before 1st instance is created
}

~SuperHero() {
// Destructor implicitly creates a Finalize method
}
}

VB.NET Using Objects C#
Dim hero As SuperHero = New SuperHero
‘ or
Dim hero As New SuperHero

With hero
.Name = “SpamMan”
.PowerLevel = 3
End With

hero.Defend(“Laura Jones”)
hero.Rest()     ‘ Calling Shared method
‘ or
SuperHero.Rest()

Dim hero2 As SuperHero = hero  ‘ Both reference the same object
hero2.Name = “WormWoman”
Console.WriteLine(hero.Name)   ‘ Prints WormWoman

hero = Nothing ‘ Free the object

If hero Is Nothing Then _
hero = New SuperHero

Dim obj As Object = New SuperHero
If TypeOf obj Is SuperHero Then _
Console.WriteLine(“Is a SuperHero object.”)

‘ Mark object for quick disposal
Using reader As StreamReader = File.OpenText(“test.txt”)
Dim line As String = reader.ReadLine()
While Not line Is Nothing
Console.WriteLine(line)
line = reader.ReadLine()
End While
End Using

 

SuperHero hero = new SuperHero();

// No “With” construct
hero.Name = “SpamMan”;
hero.PowerLevel = 3;

hero.Defend(“Laura Jones”);
SuperHero.Rest();   // Calling static method

SuperHero hero2 = hero;   // Both reference the same object
hero2.Name = “WormWoman”;
Console.WriteLine(hero.Name);   // Prints WormWoman

hero = null ;   // Free the object

if (hero == null)
hero = new SuperHero();

Object obj = new SuperHero();
if (obj is SuperHero)
Console.WriteLine(“Is a SuperHero object.”);

// Mark object for quick disposal
using (StreamReader reader = File.OpenText(“test.txt”)) {
string line;
while ((line = reader.ReadLine()) != null)
Console.WriteLine(line);
}

VB.NET Structs C#
Structure StudentRecord
Public name As String
Public gpa As Single

Public Sub New(ByVal name As String, ByVal gpa As Single)
Me.name = name
Me.gpa = gpa
End Sub
End Structure

Dim stu As StudentRecord = New StudentRecord(“Bob”, 3.5)
Dim stu2 As StudentRecord = stu

stu2.name = “Sue”
Console.WriteLine(stu.name)    ‘ Prints Bob
Console.WriteLine(stu2.name)  ‘ Prints Sue

 

struct StudentRecord {
public string name;
public float gpa;

public StudentRecord(string name, float gpa) {
this.name = name;
this.gpa = gpa;
}
}

StudentRecord stu = new StudentRecord(“Bob”, 3.5f);
StudentRecord stu2 = stu;

stu2.name = “Sue”;
Console.WriteLine(stu.name);    // Prints Bob
Console.WriteLine(stu2.name);   // Prints Sue

VB.NET Properties C#
‘ Auto-implemented properties are new to VB10
Public Property Name As String
Public Property Size As Integer = -1     ‘ Default value, Get and Set both Public

‘ Traditional property implementation
Private mName As String
Public Property Name() As String
Get
Return mName
End Get
Set(ByVal value As String)
mName = value
End Set
End Property

‘ Read-only property
Private mPowerLevel As Integer
Public ReadOnly Property PowerLevel() As Integer
Get
Return mPowerLevel
End Get
End Property

‘ Write-only property
Private mHeight As Double
Public WriteOnly Property Height() As Double
Set(ByVal value As Double)
mHeight = If(value < 0, mHeight = 0, mHeight = value)
End Set
End Property

 

// Auto-implemented properties
public string Name { get; set; }
public int Size { get; protected set; }     // Set default value in constructor

// Traditional property implementation
private string name;
public string Name {
get {
return name;
}
set {
name = value;
}
}

// Read-only property
private int powerLevel;
public int PowerLevel {
get {
return powerLevel;
}
}

// Write-only property
private double height;
public double Height {
set {
height = value < 0 ? 0 : value;
}
}

VB.NET Delegates / Events C#
Delegate Sub MsgArrivedEventHandler(ByVal message As String)

Event MsgArrivedEvent As MsgArrivedEventHandler

‘ or to define an event which declares a delegate implicitly
Event MsgArrivedEvent(ByVal message As String)

AddHandler MsgArrivedEvent, AddressOf My_MsgArrivedCallback
‘ Won’t throw an exception if obj is Nothing
RaiseEvent MsgArrivedEvent(“Test message”)
RemoveHandler MsgArrivedEvent, AddressOf My_MsgArrivedCallback

Imports System.Windows.Forms

Dim WithEvents MyButton As Button   ‘ WithEvents can’t be used on local variable
MyButton = New Button

Private Sub MyButton_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles MyButton.Click
MessageBox.Show(Me, “Button was clicked”, “Info”, _
MessageBoxButtons.OK, MessageBoxIcon.Information)
End Sub

 

delegate void MsgArrivedEventHandler(string message);

event MsgArrivedEventHandler MsgArrivedEvent;

// Delegates must be used with events in C#

MsgArrivedEvent += new MsgArrivedEventHandler(My_MsgArrivedEventCallback);
MsgArrivedEvent(“Test message”);    // Throws exception if obj is null
MsgArrivedEvent -= new MsgArrivedEventHandler(My_MsgArrivedEventCallback);

using System.Windows.Forms;

Button MyButton = new Button();
MyButton.Click += new System.EventHandler(MyButton_Click);

private void MyButton_Click(object sender, System.EventArgs e) {
MessageBox.Show(this, “Button was clicked”, “Info”,
MessageBoxButtons.OK, MessageBoxIcon.Information);
}

VB.NET Generics C#
‘ Enforce accepted data type at compile-time
Dim numbers As New List(Of Integer)
numbers.Add(2)
numbers.Add(4)
DisplayList(Of Integer)(numbers)

‘ Subroutine can display any type of List
Sub DisplayList(Of T)(ByVal list As List(Of T))
For Each item As T In list
Console.WriteLine(item)
Next
End Sub

‘ Class works on any data type
Class SillyList(Of T)
Private list(10) As T
Private rand As New Random

Public Sub Add(ByVal item As T)
list(rand.Next(10)) = item
End Sub

Public Function GetItem() As T
Return list(rand.Next(10))
End Function
End Class

‘ Limit T to only types that implement IComparable
Function Maximum(Of T As IComparable)(ByVal ParamArray items As T()) As T
Dim max As T = items(0)
For Each item As T In items
If item.CompareTo(max) > 0 Then max = item
Next
Return max
End Function

 

// Enforce accepted data type at compile-time
List<int> numbers = new List<int>();
numbers.Add(2);
numbers.Add(4);
DisplayList<int>(numbers);

// Function can display any type of List
void DisplayList<T>(List<T> list) {
foreach (T item in list)
Console.WriteLine(item);
}

// Class works on any data type
class SillyList<T> {
private T[] list = new T[10];
private Random rand = new Random();

public void Add(T item) {
list[rand.Next(10)] = item;
}

public T GetItem() {
return list[rand.Next(10)];
}
}

// Limit T to only types that implement IComparable
T Maximum<T>(params T[] items) where T : IComparable<T> {
T max = items[0];
foreach (T item in items)
if (item.CompareTo(max) > 0)
max = item;
return max;
}

VB.NET LINQ C#
Dim nums() As Integer = {5, 8, 2, 1, 6}

‘ Get all numbers in the array above 4
Dim results = From value In nums
Where value > 4
Select value

Console.WriteLine(results.Count())     ‘ 3
Console.WriteLine(results.First())     ‘ 5
Console.WriteLine(results.Last())     ‘ 6
Console.WriteLine(results.Average())     ‘ 6.33333

‘ Displays 5 8 6
For Each n As Integer In results
Console.Write(n & ” “)
Next

results = results.Intersect({5, 6, 7})     ‘ 5 6
results = results.Concat({5, 1, 5})     ‘ 5 6 5 1 5
results = results.Distinct()     ‘ 5 6 1

Dim Students() As Student = {
New Student With {.Name = “Bob”, .GPA = 3.5},
New Student With {.Name = “Sue”, .GPA = 4.0},
New Student With {.Name = “Joe”, .GPA = 1.9}
}

‘ Get an ordered list of all students by GPA with GPA >= 3.0
Dim goodStudents = From s In Students
Where s.GPA >= 3.0
Order By s.GPA Descending
Select s

Console.WriteLine(goodStudents.First.Name)     ‘ Sue

 

int[] nums = { 5, 8, 2, 1, 6 };

// Get all numbers in the array above 4
var results = from value in nums
where value > 4
select value;

Console.WriteLine(results.Count());     // 3
Console.WriteLine(results.First());     // 5
Console.WriteLine(results.Last());     // 6
Console.WriteLine(results.Average());     // 6.33333

// Displays 5 8 6
foreach (int n in results)
Console.Write(n + ” “);

results = results.Intersect(new[] {5, 6, 7});     // 5 6
results = results.Concat(new[] {5, 1, 5});     // 5 6 5 1 5
results = results.Distinct();     // 5 6 1

Student[] Students = {
new Student{ Name = “Bob”, GPA = 3.5 },
new Student{ Name = “Sue”, GPA = 4.0 },
new Student{ Name = “Joe”, GPA = 1.9 }
};

// Get an ordered list of all students by GPA with GPA >= 3.0
var goodStudents = from s in Students
where s.GPA >= 3.0
orderby s.GPA descending
select s;

Console.WriteLine(goodStudents.First().Name);     // Sue


VB.NET Console I/O C#
Console.Write(“What’s your name? “)
Dim name As String = Console.ReadLine()
Console.Write(“How old are you? “)
Dim age As Integer = Val(Console.ReadLine())
Console.WriteLine(“{0} is {1} years old.”, name, age)
‘ or
Console.WriteLine(name & ” is ” & age & ” years old.”)

Dim c As Integer
c = Console.Read()    ‘ Read single char
Console.WriteLine(c)   ‘ Prints 65 if user enters “A”


 

Console.Write(“What’s your name? “);
string name = Console.ReadLine();
Console.Write(“How old are you? “);
int age = Convert.ToInt32(Console.ReadLine());
Console.WriteLine(“{0} is {1} years old.”, name, age);
// or
Console.WriteLine(name + ” is ” + age + ” years old.”);
int c = Console.Read();  // Read single char
Console.WriteLine(c);    // Prints 65 if user enters “A”


VB.NET File I/O C#
Imports System.IO

‘ Write out to text file
Dim writer As StreamWriter = File.CreateText(“c:\myfile.txt”)
writer.WriteLine(“Out to file.”)
writer.Close()

‘ Read all lines from text file
Dim reader As StreamReader = File.OpenText(“c:\myfile.txt”)
Dim line As String = reader.ReadLine()
While Not line Is Nothing
Console.WriteLine(line)
line = reader.ReadLine()
End While
reader.Close()

‘ Write out to binary file
Dim str As String = “Text data”
Dim num As Integer = 123
Dim binWriter As New BinaryWriter(File.OpenWrite(“c:\myfile.dat”))
binWriter.Write(str)
binWriter.Write(num)
binWriter.Close()

‘ Read from binary file
Dim binReader As New BinaryReader(File.OpenRead(“c:\myfile.dat”))
str = binReader.ReadString()
num = binReader.ReadInt32()
binReader.Close()


 

using System.IO;

// Write out to text file
StreamWriter writer = File.CreateText(“c:\\myfile.txt”);
writer.WriteLine(“Out to file.”);
writer.Close();

// Read all lines from text file
StreamReader reader = File.OpenText(“c:\\myfile.txt”);
string line = reader.ReadLine();
while (line != null) {
Console.WriteLine(line);
line = reader.ReadLine();
}
reader.Close();

// Write out to binary file
string str = “Text data”;
int num = 123;
BinaryWriter binWriter = new BinaryWriter(File.OpenWrite(“c:\\myfile.dat”));
binWriter.Write(str);
binWriter.Write(num);
binWriter.Close();

// Read from binary file
BinaryReader binReader = new BinaryReader(File.OpenRead(“c:\\myfile.dat”));
str = binReader.ReadString();
num = binReader.ReadInt32();
binReader.Close();


 

Posted in .Net, asp.net feature, Visual Studio | Tagged: , , , , , | Leave a Comment »

Creating Window Service with .NET VS2008

Posted by Viral Sarvaiya on December 31, 2010


Hi,

Last post of year 2010, and wish u happy new year…

today i post the basic thing of the window service.

What is a Windows Service?

Windows Service applications are long-running applications that are ideal for use in server environments. The applications do not have a user interface or produce any visual output. Any user messages are typically written to the Windows Event Log.

Windows Services are controlled through the Service Control Manager where they can be stopped, paused, and started as needed.

Create a Windows Service

The service we will create does nothing really useful other than serve as a demonstration. When the service is started we will log an entry in a database indicating that it has started. The service will create a database entry on a specified interval during the time in which it is running. The service will create a final database entry when stopping. The service will also automatically log an entry in the Windows Application Log when it is successfully started or stopped.

1. Start a new project

2. Select Windows Service from the list of available project templates

3. The designer will open in design mode

4. Take the time control to the designer(make sure it is not windows control, it has to


public System.Timers.Timer timer1;

5. set the Enabled property to False and the Interval property to 30000 milliseconds

now come to service.cs page..

there are class that extend ServiceBase class with there are constractor and 2 mehtod already created is start and stop.

6. Create table “ServiceLog” as per blow


CREATE TABLE MyServiceLog (
Id int IDENTITY (1, 1) NOT NULL,
Status varchar (100),
Created datetime NOT NULL
)

7. Create event timer’s ElapsedEventHandler timer1_Elapsed event

in the service.cs file


using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Linq;
using System.ServiceProcess;
using System.Text;
using System.Threading;
using System.Data.SqlClient;

namespace WindowsServiceTest
{
public partial class Service1 : ServiceBase
{
public Service1()
{
InitializeComponent();
}

protected override void OnStart(string[] args)
{
this.timer1.Enabled = true;
this.LogMessage("Service Started");
}

protected override void OnStop()
{
this.timer1.Enabled = false;
this.LogMessage("Service Stopped");
}

/*
* Respond to the Elapsed event of the timer control
*/

private void timer1_Elapsed(object sender,System.Timers.ElapsedEventArgs e)
{
this.LogMessage("Service Running");
}

/*
* Log specified message to database
*/

private void LogMessage(string Message)
{
SqlConnection connection = null;
SqlCommand command = null;
try
{
connection = new SqlConnection("packet size=4096;server=ServerName;persist security info=False;database=DataBaseName;uid=Username;pwd=Password;");
command = new SqlCommand("INSERT INTO MyServiceLog (Status, Created) VALUES ('" + Message + "',getdate())", connection);
connection.Open();
int numrows = command.ExecuteNonQuery();
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex.Message);
}
finally
{
command.Dispose();
connection.Dispose();
}
}
}
}

8. Now Install the Windows Service

The Windows Service should be installed by using the InstallUtil.exe provided with the .NET Framework or through a deployment project such as a Microsoft Installer (MSI) file.

You must also add an Installer to your Windows Service so that the InstallUtil, or any other installation program, knows what configuration settings to apply to your service.

1. Switch to the design view for the service

2. Right click and select Add Installer

3. Switch to the design view of the ProjectInstaller that is added

4. Set the properties of the serviceInstaller1 component

1. ServiceName = My Sample Service

2. StartType = Automatic

5. Set the properties of the serviceProcessInstaller1 component

1. Account = LocalSystem

6. Build the Solution

The file ProjectInstaller.cs automatically made.

Install service with InstallUtil.exe

1. Open Visual Studio .NET command prompt

2. Go to the debug or release folder

3. Run command InstallUtil.exe MyWindowsService.exe

4. Open services from control panel -> administrative tools

5. Find the Service and right click on it and start the service.

6. Check the database. log will inserted to database in every 3 second

Enjoy Window service.

http://msdn.microsoft.com/en-us/library/d56de412

Posted in .Net, Visual Studio, Window Service | Tagged: , , | 1 Comment »

New Features in Visual Studio 2010 and the .NET Framework 4.0

Posted by Viral Sarvaiya on May 29, 2010


Visual Studio 2008 may be better than sliced bread, but the development team at Microsoft has already been working on the next release. They have recently given us Visual Studio 2010 and the .NET Framework 4.0 as a Community Technology Preview (CTP); it boasts several features that would appeal to developers.

This article won’t go into every single feature, but will go into features that are the most relevant to .NET developers. Please note that because this is a CTP, it doesn’t mean that the final release will be exactly as you see in the CTP or as is described here. I can go over the features roughly as follows:

New Features in the Visual Studio 2010 IDE and .NET Framework 4.0

  • Call Hierarchy of methods
  • A New Quick Search
  • Multi-targeting more accurate
  • Parallel Programming and Debugging
  • XSLT Profiling and Debugging
  • The XSD Designer

New ASP.NET features

  • Static IDs for ASP.NET Controls
  • The Chart control
  • Web.config transformation

New VB.NET features

  • Auto Implemented Properties for VB.NET
  • Collection Initializers
  • Implicit Line Continuations
  • Statements in Lambda Expressions

New C# features

  • Dynamic Types
  • Optional parameters
  • Named and Optional Arguments

For more details :

http://www.codeguru.com/vb/vb_internet/aspnet/article.php/c15645__1/New-Features-in-Visual-Studio-2010-and-the-NET-Framework-40.htm

http://msdn.microsoft.com/en-us/library/bb383815.aspx

http://msdn.microsoft.com/en-us/library/bb386063.aspx

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