Happy Coding...!

How to: Send Data Using the WebRequest Class

2009-02-03T04:24:00.000-08:00

For C#,
=======

using System;
using System.IO;
using System.Net;
using System.Text;

namespace Examples.System.Net
{
  public class WebRequestPostExample
  {
      public static void Main ()
      {
          // Create a request using a URL that can receive a post. 
          WebRequest request = WebRequest.Create ("http://www.rushiraval.co.cc);
          // Set the Method property of the request to POST.
          request.Method = "POST";
          // Create POST data and convert it to a byte array.
          string postData = "This is a test that posts this string to a Web server.";
          byte[] byteArray = Encoding.UTF8.GetBytes (postData);
          // Set the ContentType property of the WebRequest.
          request.ContentType = "application/x-www-form-urlencoded";
          // Set the ContentLength property of the WebRequest.
          request.ContentLength = byteArray.Length;
          // Get the request stream.
          Stream dataStream = request.GetRequestStream ();
          // Write the data to the request stream.
          dataStream.Write (byteArray, 0, byteArray.Length);
          // Close the Stream object.
          dataStream.Close ();
          // Get the response.
          WebResponse response = request.GetResponse ();
          // Display the status.
          Console.WriteLine (((HttpWebResponse)response).StatusDescription);
          // Get the stream containing content returned by the server.
          dataStream = response.GetResponseStream ();
          // Open the stream using a StreamReader for easy access.
          StreamReader reader = new StreamReader (dataStream);
          // Read the content.
          string responseFromServer = reader.ReadToEnd ();
          // Display the content.
          Console.WriteLine (responseFromServer);
          // Clean up the streams.
          reader.Close ();
          dataStream.Close ();
          response.Close ();
      }
  }

------------------------------------------------------------------------------------

For VB,
==========
Imports System
Imports System.IO
Imports System.Net
Imports System.Text
Namespace Examples.System.Net
  Public Class WebRequestPostExample

      Public Shared Sub Main()
          ' Create a request using a URL that can receive a post. 
          Dim request As WebRequest = WebRequest.Create("http://www.rushiraval.co.cc ")
          ' Set the Method property of the request to POST.
          request.Method = "POST"
          ' Create POST data and convert it to a byte array.
          Dim postData As String = "This is a test that posts this string to a Web server."
          Dim byteArray As Byte() = Encoding.UTF8.GetBytes(postData)
          ' Set the ContentType property of the WebRequest.
          request.ContentType = "application/x-www-form-urlencoded"
          ' Set the ContentLength property of the WebRequest.
          request.ContentLength = byteArray.Length
          ' Get the request stream.
          Dim dataStream As Stream = request.GetRequestStream()
          ' Write the data to the request stream.
          dataStream.Write(byteArray, 0, byteArray.Length)
          ' Close the Stream object.
          dataStream.Close()
          ' Get the response.
          Dim response As WebResponse = request.GetResponse()
          ' Display the status.
          Console.WriteLine(CType(response, HttpWebResponse).StatusDescription)
          ' Get the stream containing content returned by the server.
          dataStream = response.GetResponseStream()
          ' Open the stream using a StreamReader for easy access.
          Dim reader As New StreamReader(dataStream)
          ' Read the content.
          Dim responseFromServer As String = reader.ReadToEnd()
          ' Display the content.
          Console.WriteLine(responseFromServer)
          ' Clean up the streams.
          reader.Close()
          dataStream.Close()
          response.Close()

      End Sub
  End Class
End Namespace

}

for detailed, read more

Javascript validation for input limited text into textbox or textarea in ASP.NET

2008-10-23T22:32:00.000-07:00

Javascript validation for input limited text into textbox or textarea
On design page source::
----------------------------

On b/h code source page:
protected void Page_Load(object sender, EventArgs e)
{
txtLocation.Attributes.Add("onkeypress", "return LocationLength()");
txtLocation.Attributes.Add("onkeyup", "return LocationLength()");
}

Happy Coding..!!

Get And Set The System Date And Time using c#

2008-10-18T06:50:00.000-07:00

Have you want to get your current system date and time as well as set the system date and time using c# code.
here it is, C# code snippet that uses unmanaged code to retrieve the current date and time of the Windows operating system, and also sets it to the specified values.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Windows.Forms;
using System.Runtime.InteropServices;
namespace Sample
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
public struct SystemTime
{
public ushort Year;
public ushort Month;
public ushort DayOfWeek;
public ushort Day;
public ushort Hour;
public ushort Minute;
public ushort Second;
public ushort Millisecond;
};
[DllImport("kernel32.dll", EntryPoint = "GetSystemTime", SetLastError = true)]
public extern static void Win32GetSystemTime(ref SystemTime sysTime);
[DllImport("kernel32.dll", EntryPoint = "SetSystemTime", SetLastError = true)]
public extern static bool Win32SetSystemTime(ref SystemTime sysTime);
private void button1_Click(object sender, EventArgs e)
{
// Set system date and time
SystemTime updatedTime = new SystemTime();
updatedTime.Year = (ushort)2008;
updatedTime.Month = (ushort)4;
updatedTime.Day = (ushort)23;
// UTC time; it will be modified according to the regional settings of the target computer so the actual hour might differ
updatedTime.Hour = (ushort)10;
updatedTime.Minute = (ushort)0;
updatedTime.Second = (ushort)0;
// Call the unmanaged function that sets the new date and time instantly
Win32SetSystemTime(ref updatedTime);
// Retrieve the current system date and time
SystemTime currTime = new SystemTime();
Win32GetSystemTime(ref currTime);
// You can now use the struct to retrieve the date and time
MessageBox.Show("It's " + currTime.Hour + " o'clock. Do you know where your C# code is?");
}
}
}

Happy Coding..!!

Delete All Temporary Internet Files Of Internet Explorer

2008-10-18T06:41:00.000-07:00

using System.IO;
public static void Main()
{
ClearFolder(new DirectoryInfo(Environment.GetFolderPath(Environment.SpecialFolder.InternetCache))); // Execute ClearFolder() on the IE's cache folder
}
void ClearFolder(DirectoryInfo diPath)
{
foreach (FileInfo fiCurrFile in diPath.GetFiles())
{
fiCurrFile.Delete();
}
foreach (DirectoryInfo diSubFolder in diPath.GetDirectories())
{
ClearFolder(diSubFolder); // Call recursively for all subfolders
}
}

Happy Coding..!!

How to get IP address of the Current Machine?

2008-10-16T04:12:00.000-07:00

public void UseDNS()
{
string hostName = Dns.GetHostName();
Console.WriteLine("Host Name = " + hostName);
IPHostEntry local = Dns.GetHostByName(hostName);
foreach(IPAddress ipaddress in local.AddressList)
{
Console.WriteLine("IPAddress = " + ipaddress.ToString());
}
}

Resolving w3c validation issues details...

2008-10-11T04:28:00.000-07:00

For those who are wondering why should one bother with W3C Validations,
please read Why should we Validate our WebSites?

When validating your website using W3C some weird errors might occur

An Example is


there is no attribute "border".

even if you haven't given the border attribute

The Reason



The ASP.NET engines sees the W3C validator as down-level browser and renders
non-XHTML compliant code. Your code is most likely fine. The problem is with
ASP.NET.

The Solution(Step Wise)

1.Right Click on your Solution Explorer
2.Click on Add ASP.NET Folder ---> App_Browsers
3.Now Click on App_Browsers ---> Add New Item
4.A dialog Box now pops up with some Visual Studio Installed Templates.
Select the Browser File Template from there, change the name as W3CValidations.browser(any other convenient name also) and Click on the Add Button
5.Delete the whole XML MarkUp code inside the W3CValidations.browser
6.Place the following code instead

7.Now upload this Folder nad File to your Hosting Service
8.Re Validate using W3C Validator
9.Bingo! You got a Clean Validation Certificate.
10. Show off the Validation Certificate to all those who cares [:)]

Happy coding..!!

ref:
http://fun2code.blogspot.com/search?updated-max=2008-08-28T15%3A02%3A00%2B05%3A30&max-results=3

use Messagebox in asp.net

2008-10-04T04:33:00.000-07:00

Declaration:
using System.Windows.Forms;

Code:
MessageBox.Show("message right here!!");

Msgbox for ASP.Net

2008-10-04T04:25:00.000-07:00

Messsagebox function for ASP.Net.
Call this function from the server side, and a msgbox will appear on the client browser. As a bonus, the msgbox javascript is added after the rest of the form, so the browser displays the html for the page and then the msgbox.

Declaration:
Imports System.Text

Code:
Public Sub UserMsgBox(ByVal sMsg As String)

Dim sb As New StringBuilder()
Dim oFormObject As System.Web.UI.Control

sMsg = sMsg.Replace("'", "\'")
sMsg = sMsg.Replace(Chr(34), "\" & Chr(34))
sMsg = sMsg.Replace(vbCrLf, "\n")
sMsg = ""

sb = New StringBuilder()
sb.Append(sMsg)

For Each oFormObject In Me.Controls
If TypeOf oFormObject Is HtmlForm Then
Exit For
End If
Next

' Add the javascript after the form object so that the
' message doesn't appear on a blank screen.
oFormObject.Controls.AddAt(oFormObject.Controls.Count, New LiteralControl(sb.ToString()))

end sub

Happy coding..!!

Error - GetTypeHashCode() : no suitable method found to override

2008-09-29T04:50:00.000-07:00

I found it very useful so I want to it here. I found a need for it while transferring my site from vb.net to C#.

After creating an ASP.NET web form using Microsoft Visual Studio 2005 or Microsoft Visual Studio 2005 Team Suite, I renamed the form from it's default name "Default.aspx" to a more user-friendly name "Order.aspx" within MS VS. After adding more code to the C# code-behind page, I discovered the following line: "public partial class _Default"

Being new to the ASP.NET programming language, I changed the "_Default" to "Order" thinking MS VS had failed to rename items within the code it generates. This caused the following error to display at debug/run time: "GetTypeHashCode() : no suitable method found to override"

There were several other errors displayed as well.

The class names must match between the .aspx and .aspx.cs web pages. Here is what the lines in each file should look like:

In the ASPX source file: %@ Page Language="C#" codefile="FormName.aspx.cs" Inherits="FormName_aspx" %

In the ASPX.CS source file: public partial class FormName_aspx : Page

Once I changed the .ASPX file to match the class name in the .ASPX.CS file, the errors were resolved.

Ref::
http://forums.asp.net/t/1225330.aspx
http://social.msdn.microsoft.com/Forums/en-US/csharpgeneral/thread/7dbed154-34c6-41e3-b44f-23a594e9ccba/

GenerateRandomName for images in asp.net 2.0 using c#

2008-09-27T05:42:00.000-07:00

public string GenerateRandomName()
{

string allowedChars = "";
allowedChars = "a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z,";
allowedChars += "A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z,";
allowedChars += "1,2,3,4,5,6,7,8,9,0";
char[] sep ={ ',' };
string[] arr = allowedChars.Split(sep);
string fname = "";
string temp = "";
Random rand = new Random();
for (int i = 0; i < 10; i++)
{
temp = arr[rand.Next(0, arr.Length)];
fname += temp;
}
return fname;
}

just call this like::
string getrandomname = GenerateRandomName;

Happy Coding..!!

code to store and retrieve image from sql server

2008-09-26T22:47:00.000-07:00

Image tmpImg = pictureBox1.Image;
System.IO.MemoryStream memBuffer = new System.IO.MemoryStream();
tmpImg.Save(memBuffer, System.Drawing.Imaging.ImageFormat.Bmp);
byte[] output = new byte[memBuffer.Length];
memBuffer.Read(output, 0, (int)memBuffer.Length);
// Write to SQL here

// Read from SQL here
memBuffer.Write(output, 0, output.Length);
tmpImg = Image.FromStream(memBuffer);
pictureBox1.Image = tmpImg;

How to ping a computer using windows application

2008-09-12T07:40:00.000-07:00

// Pass host name or IP Address.
public void PingHost(string host)
{
try
{
System.Net.NetworkInformation.Ping ping = new System.Net.NetworkInformation.Ping();
System.Net.NetworkInformation.PingReply pingReply = ping.Send(host);

MessageBox.Show("Status: " + pingReply.Status.ToString());
}
catch (System.Net.NetworkInformation.PingException e)
{
MessageBox.Show(e.Message);
}
}

private void button1_Click(object sender, EventArgs e)
{
PingHost(textBox1.Text.Trim());
}

Code for Lock Computer, VS 2005, c#

2008-09-12T06:53:00.000-07:00

Follwing code is for Lock a Computer. It is nothing but calling of
“ C:\WINDOWS\system32\rundll32.exe user32.dll,LockWorkStation” command. There
are Command for shut down, log off , restart....

using System;
using System.Collections.Generic;
using System.Text;
//using System.linq;
using System.Diagnostics;

namespace r.LockComputer
{
class Program
{
static void Main(string[] args)
{
Process.Start(@"C:\WINDOWS\system32\rundll32.exe", "user32.dll,LockWorkStation");
}
}
}

Store Image or Picture into DataBase and Retrieve from Database

2008-08-26T07:13:00.000-07:00

Here is an example for How to store image into database and retrive that and display one by one

steps

*****

1. create one temp folder under root

2. save this 3 files into that

3. create database in ms-sql server

4. note : if connection not establishing with this driver , better to use jdbc :-> Odbc :-> driver

5. database code for ms-sqlserver

-create table image (uid numeric(6) identity (1001,1), img image )
-select * from image

getfile.html
************

Gettostore.jsp
**************

<%@ page language=”java” import=”java.sql.*,java.io.*” errorPage=”" %>
<%
try
{
Connection con = null;
System.setProperty( “jdbc.drivers”, “com.microsoft.jdbc.sqlserver.SQLServerDriver” );
Class.forName( “com.microsoft.jdbc.sqlserver.SQLServerDriver” );
con = DriverManager.getConnection( “jdbc:microsoft:sqlserver://SCALAR6:1433;DatabaseName=JAVATEAM;SelectMethod=cursor;User=sa;Password=ontrack20″ );
PreparedStatement pst = con.prepareStatement(”insert into image(img) values(?)”);

//logo path is a value which is come from file browser
FileInputStream fis=new FileInputStream(request.getParameter ( “path” ) );
byte[] b= new byte[fis.available()+1];
fis.read(b);
pst.setBytes(1,b);
pst.executeUpdate();
pst.close();
con.close();
}
catch(SQLException e)
{
out.println ( e);
}
catch (ClassNotFoundException e)
{
out.println( e );
}

View from Database

link –>

Puttoview.jsp
*************

<%@ page contentType=”text/html; charset=iso-8859-1″ language=”java” import=”java.io.*,java.sql.*” errorPage=”" %>

Home

<%
try
{
Connection con = null;
System.setProperty( “jdbc.drivers”, “com.microsoft.jdbc.sqlserver.SQLServerDriver” );
Class.forName( “com.microsoft.jdbc.sqlserver.SQLServerDriver” );
con = DriverManager.getConnection( “jdbc:microsoft:sqlserver://SCALAR6:1433;DatabaseName=JAVATEAM;SelectMethod=cursor;User=sa;Password=ontrack20″ );
PreparedStatement pst = null;
ResultSet rs=null;
FileOutputStream fos;
int i = 0;
%>

<%
pst = con.prepareStatement(”select uid,img from image “); // better to use where uniqueid = ‘value’
rs=pst.executeQuery();
while(rs.next())
{
i = rs.getInt (1);
byte[] b=rs.getBytes(”img”);
fos=new FileOutputStream(”c://tomcat4.1/webapps/ROOT/temp/image” + i + “.jpg”);
fos.write(b);
fos.close();

<%
}
pst.close();
con.close();
}
catch(SQLException e)
{
out.println ( e);
}
catch (ClassNotFoundException e)
{
out.println( e );
}

.jpg” mce_src=”./image<%=i%>.jpg” >
<%=i%>

//run : http://localhost:8080/temp/getfile.html

Tricks with Server.MapPath

2008-08-26T06:45:00.000-07:00

The Server.MapPath method can be used to retrieve several interesting properties about the running ASP.NET application, for example:

' the current directory
currDir = Server.MapPath(".")

' the parent directory
parentDir = Server.MapPath("..")

' the application's root directory
rootDir = Server.MapPath("/")

For example, you can store the application's root directory in an Application variable, and use it to dynamically build physical paths to other files and directories.

Happy Coding..!!

How to ignore JavaScript errors at runtime

2008-08-25T00:28:00.000-07:00

Happy Coding ..!!

ASP.NET: How To Name A Variable Or Property Using .NET’s “Reserved” Words

2008-07-24T08:22:00.000-07:00

Let’s say you want to give your class a boolean property named Error that gets turned on or off if something goes awry in your code. You would think that you can’t do this because the word “Error” is reserved by .NET. However, there is a way. All you have to do is put Square Brackets around the word! For instance:

Public Property [Error]() As Boolean

Do it .! and Enjoying Coding with Reserved Keywords...

Happy Coding..!

Visual Studio.NET: How To Comment/Uncomment Large Blocks of Code

2008-07-24T08:18:00.000-07:00

Hello .Net Coders,
This One is for you,
To comment a large block of code (VS.NET), highlight the area you want to comment out and hold Ctrl and press K and then C.
To uncomment, highlight the commented area and hit Ctrl + K + U.
The mass uncommenting merely removes the forward-most apostrophe, so if you have actual comments in your commented code that were included in your initial highlighted region, they will remain comments upon uncommenting.

This tips is using at debugging time is most used by me.

Happy Coding..!

Get Total and Free Disk Space

2008-07-21T08:13:00.000-07:00

Declarations:
Private Declare Function GetDiskFreeSpaceEx _
Lib "kernel32" _
Alias "GetDiskFreeSpaceExA" _
(ByVal lpDirectoryName As String, _
ByRef lpFreeBytesAvailableToCaller As Long, _
ByRef lpTotalNumberOfBytes As Long, _
ByRef lpTotalNumberOfFreeBytes As Long) As Long

Code:
Public Function GetFreeSpace(ByVal Drive As String) As Long
'returns free space in MB, formatted to two decimal places
'e.g., msgbox("Free Space on C: "& GetFreeSpace("C:\") & "MB")

Dim lBytesTotal, lFreeBytes, lFreeBytesAvailable As Long

Dim iAns As Long

iAns = GetDiskFreeSpaceEx(Drive, lFreeBytesAvailable, _
lBytesTotal, lFreeBytes)
If ians > 0 Then

Return BytesToMegabytes(lFreeBytes)
Else
Throw New Exception("Invalid or unreadable drive")
End If

End Function

Public Function GetTotalSpace(ByVal Drive As String) As String
'returns total space in MB, formatted to two decimal places
'e.g., msgbox("Free Space on C: "& GetTotalSpace("C:\") & "MB")

Dim lBytesTotal, lFreeBytes, lFreeBytesAvailable As Long

Dim iAns As Long

iAns = GetDiskFreeSpaceEx(Drive, lFreeBytesAvailable, _
lBytesTotal, lFreeBytes)
If iAns > 0 Then

Return BytesToMegabytes(lBytesTotal)
Else
Throw New Exception("Invalid or unreadable drive")
End If
End Function

Private Function BytesToMegabytes(ByVal Bytes As Long) _
As Long

Dim dblAns As Double
dblAns = (Bytes / 1024) / 1024
BytesToMegabytes = Format(dblAns, "###,###,##0.00")

End Function

screen keyword - vb.net, Centering a form in VB.NET

2008-07-16T04:51:00.000-07:00

Try this one :

frm.Top = (Screen.PrimaryScreen.WorkingArea.Height - frm.Height) / 2
frm.Left = (Screen.PrimaryScreen.WorkingArea.Width - frm.Width) / 2

Get the Current Screen Resolution (VB.NET)

2008-07-16T04:49:00.000-07:00

Public Function ScreenResolution() As String
Dim intX As Integer = Screen.PrimaryScreen.Bounds.Width
Dim intY As Integer = Screen.PrimaryScreen.Bounds.Height
Return intX & " X " & intY
End Function

How to get CAPS LOCK IS ON (VB.NET)

2008-07-10T04:11:00.000-07:00

When User Type a Password, How to give a message CAPS LOCK is On or not.

Private Sub txtPassword_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles txtPassword.TextChanged
If My.Computer.Keyboard.CapsLock = True Then
'MsgBox("CAPS LOCK is ON", MsgBoxStyle.Information, "Password")
End If
End Sub

Change password(VB.NET)

2008-07-10T03:46:00.000-07:00

Private Sub btnsave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnsave.Click
If txtretype.Text = "" And txtold.Text = txtnew.Text Then
Try
cmd = New SqlCommand("insert into login values(@a, @B)", con)
cmd.Parameters.Add("@a", txtname.Text)
cmd.Parameters.Add("@b", txtretype.Text)

cmd.ExecuteNonQuery()
MessageBox.Show("USER CREATED SUCCESSFULLY", "REGISTRATION", MessageBoxButtons.OK, MessageBoxIcon.Information)

Catch ex As Exception
MsgBox(ex.Message)
End Try
End If
End Sub

Simple ASP.NET Email function

2008-07-02T22:36:00.000-07:00

Zoom Text Javascript

2008-07-02T04:55:00.000-07:00

Another great javascript that zooms text onto the page which can be used as an intro message. The zoom text script is fully configurable and as it utilizes layers, can be used anywhere on the page. Simply change the co-ordinates in the div tag.
You can add as many messages as you like and change the colors to suit.

STEP 1
Copy the code below and paste this into the section of your html document. Add your messages and change font type, size and colors, etc, where the comments are indicated.

STEP 2
Copy the event handler code and paste this into the body tag of your html document.

onLoad="start()" onUnload="stop()"

STEP 3
Copy the code below and place this directly below the tag of your html document. Change the position of the zoom text effect by altering the" left" and "top" co-ordinates.

That;s it .!
Ref : http://www.hypergurl.com/zoomintro.html