Prevent double click using Jquery

$(document).ready(function(){

       

            $('#ctl00_hdnPostbackInProgress').val('0');

           

            $('.Button').each(function(){

                $(this).bind('click', function(e){

                    ValidateButtonPostBack($(this), e);

                });

            });

        });

       

       

        function ValidateButtonPostBack(control , e)

        {

            if($('#ctl00_hdnPostbackInProgress').val() == '0')

            {

                $('#ctl00_hdnPostbackInProgress').val('1');

               

                if(control[0].href.indexOf("WebForm_DoPostBackWithOptions") != -1)

                {

                    var startIndex = control[0].href.indexOf("WebForm_PostBackOptions") + 'WebForm_PostBackOptions'.length + 1;

                    var valGroup = control[0].href.substr(startIndex).split(',')[3].replace(/"/g,'').replace(/ /g,'');

                    if(!Page_ClientValidate(valGroup))

                    {

                        $('#ctl00_hdnPostbackInProgress').val('0');

                    }

                }

            }

            else

            {

                e.preventDefault();

            }

        }

Overriding Virtual methods

 private void Test()
{

a obja = new c();obja.ao();
}

class a{public virtual void ao() { Console.WriteLine("a"); }}

class b:a{public virtual void ao() { Console.WriteLine("b"); }}

class c:b{public override void ao() { Console.WriteLine("c"); }}
//Output : a


private void Test()
{

a obja = new c();obja.ao();
}

class a{public virtual void ao() { Console.WriteLine("a"); }}

class b:a{public override void ao() { Console.WriteLine("b"); }}

class c:b{public override void ao() { Console.WriteLine("c"); }}
//Output : b


private void Test()
{

a obja = new c();obja.ao();
}

class a{public virtual void ao() { Console.WriteLine("a"); }}

class b:a{//public virtual void ao() { Console.WriteLine("b"); }}

class c:b{public override void ao() { Console.WriteLine("c"); }}
//Output : c

private void Test()
{

a obja = new c();obja.ao();
}

class a{public virtual void ao() { Console.WriteLine("a"); }}

class b:a{public new void ao() { Console.WriteLine("b"); }}

class c:b{public void ao() { Console.WriteLine("c"); }}
//Output : a

Access Modifiers in C#

public
    The type or member can be accessed by any other code in the same assembly or another assembly that references it.
private
    The type or member can be accessed only by code in the same class or struct.
protected
    The type or member can be accessed only by code in the same class or struct, or in a class that is derived from that class.
internal
    The type or member can be accessed by any code in the same assembly, but not from another assembly.
protected internal
    The type or member can be accessed by any code in the assembly in which it is declared, or from within a derived class in another assembly. Access from another assembly must take place within a class declaration that derives from the class in which the protected internal element is declared, and it must take place through an instance of the derived class type.

Create Captcha Image using javascript in ASP.net C#

Default3.aspx

 

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default3.aspx.cs" Inherits="Default3" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
    <script type="text/javascript" language="javascript">       
        function show()
        {
      
                var chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz";
                var string_length = 5;
                var randomstring = '';
                for (var i=0; i<string_length; i++)
                {
                    var rnum = Math.floor(Math.random() * chars.length);
                    randomstring += chars.substring(rnum,rnum+1);
                }   
                var main = document.getElementById('txt1');
                main.value = randomstring;
        }
    </script>
</head>
<body>
    <form id="form1" runat="server">
   <div>
        <input type="text" id="txt1" runat="server" style="border-style: none; border-color: inherit;
            border-width: medium; background-color: black; color: red; font-family: 'Curlz MT';
            font-size: x-large; font-weight: bold; font-variant: normal; letter-spacing: 10pt;padding-left:10px;
            width: 135px;" value="1AsD" />
        <input type="button" onclick="show()" value="Change Capcha Image" />
    </div>
    <asp:TextBox ID="txtverification" runat="server"></asp:TextBox>
    &nbsp;&nbsp;&nbsp;&nbsp;
    <asp:Button ID="Button1" runat="server" Text="Verification" OnClick="Button1_Click" />
    &nbsp;&nbsp;&nbsp;&nbsp;
    <asp:Label ID="lblmsg" runat="server" Font-Bold="True" ForeColor="Red"></asp:Label>
    </form>
</body>
</html>
 

Default3.aspx.cs

protected void Button1_Click(object sender, EventArgs e)
    {
        if (txtverification.Text == txt1.Value)
        {
            lblmsg.Text = "Successfull";
        }
        else
        {
            lblmsg.Text = "Failure";
        }
    }

Split Text And Return Table With Values from function in SQL Server

CREATE FUNCTION [dbo].[

SplitTextAndReturnTableWithValues]
(
    @sTextToSplit    NVARCHAR(MAX),
    @Delimiter        NVARCHAR(50)
) 
RETURNS @tbReturn table
(
    RowId INT IDENTITY(1,1),
    Value NVARCHAR(MAX)
)
AS 
BEGIN
    SET @Delimiter = LTRIM(RTRIM(@Delimiter))
    DECLARE @sSplitedValue NVARCHAR(MAX), @Pos INT      
        
    SET @sTextToSplit = LTRIM(RTRIM(@sTextToSplit))+ @Delimiter         
    SET @Pos = CHARINDEX(@Delimiter, @sTextToSplit, 1)         
         
    IF REPLACE(@sTextToSplit, @Delimiter, '') <> ''         
        BEGIN         
            WHILE @Pos > 0         
                BEGIN         
                    SET @sSplitedValue = LTRIM(RTRIM(LEFT(@sTextToSplit, @Pos - 1)))         
                    IF @sSplitedValue <> ''         
                        BEGIN    
                             INSERT INTO @tbReturn VALUES (@sSplitedValue)
                        END         
                    SET @sTextToSplit = RIGHT(@sTextToSplit, LEN(@sTextToSplit) - @Pos)         
                    SET @Pos = CHARINDEX(@Delimiter, @sTextToSplit, 1)              
                END           
        END
    RETURN
END

Upload Multipal Files with javascript in ASP.net C#

UploadFilesWithJavascript.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="UploadFilesWithJavascript.aspx.cs" Inherits="UploadFilesWithJavascript" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
     <script language="javascript" type="text/javascript">
    var counter = 0;
    var counter2 = 0;
    function AddFileUpload()
    {
         var div = document.createElement('DIV');
         div.innerHTML = '<input id="file' + counter + '" name = "file' + counter +

                         '" type="file" />' +

                         '<input  id="Button' + counter + '" type="button" ' +

                         'value="Remove" onclick = "RemoveFileUpload(this)" />';
         document.getElementById("FileUploadContainer").appendChild(div);
         counter++;
         counter2++;
         document.getElementById("btnAdd").style.visibility = "visible";        
    }
    function RemoveFileUpload(div)
    {     
         counter2--;       
         if(counter2 == 0)
            document.getElementById("btnAdd").style.visibility = "hidden";
         document.getElementById("FileUploadContainer").removeChild(div.parentNode);
    }    
    function DeleteConfirmation()
    {
        if(confirm('Are You Sure To Delete?'))       
            return true;       
        else       
            return false;       
    }
    </script>
</head>
<body>
    <form id="form1" runat="server" enctype="multipart/form-data" method = "post">
    <input id="Button1" type="button" class="inputButton" value="Add New File To Upload" onclick="AddFileUpload()" /><br />
    <div id="FileUploadContainer">
                                                                        <!--FileUpload Controls will be added here -->
                                                                    </div>
                                                                    <asp:Button ID="btnUpload" runat="server" Text="Upload" OnClick="btnUpload_Click" />
    </form>
</body>
</html>

UploadFilesWithJavascript.aspx.cs

protected void btnUpload_Click(object sender, EventArgs e)
    {
        for (int i = 0; i < Request.Files.Count; i++)
        {
            HttpPostedFile PostedFile = Request.Files[i];
            if (getFileType(PostedFile.FileName) == "Image")
            {
                if (PostedFile.ContentLength > 0)
                {
                    string FileName = System.IO.Path.GetFileName(PostedFile.FileName).ToString();
                    int size = PostedFile.ContentLength;
                    PostedFile.SaveAs(Server.MapPath("Uploads\\") + FileName);
                }
            }
        }
    }
    string getFileType(string fileName)
    {
        string ext = Path.GetExtension(fileName);
        switch (ext.ToLower())
        {
            case ".gif":
                return "Image";
            case ".png":
                return "Image";
            case ".jpg":
                return "Image";
            case ".jpeg":
                return "Image";
            default:
                return "Not known";
        }
    }

Split Multiple Separator Text Into Table SQL Server

ALTER FUNCTION [dbo].[udf_GEN_

SplitMultipleSeparatorTextIntoTable]
( 
    @DelimiterFirst VARCHAR(5),
    @DelimiterSecond VARCHAR(5),
    @List      NVARCHAR(MAX)
)
RETURNS @TableOfValues table
  (  RowID   smallint IDENTITY(1,1),
     [Value] varchar(50)
  )
AS
   BEGIN
   
    ----select * from [udf_GEN_SplitMultipleSeparatorTextIntoTable]( '#',',','1,2#3,4#5,6#')
     
      DECLARE @LenString int

      WHILE len( @List ) > 0
         BEGIN
        
            SELECT @LenString =
               (CASE charindex( @DelimiterFirst, @List )
                   WHEN 0 THEN len( @List )
                   ELSE ( charindex( @DelimiterFirst, @List ) -1 )
                END
               )
                 
            IF SUBSTRING( @List, 1, @LenString ) <> ''
                BEGIN
                    --INSERT INTO @TableOfValues SELECT substring( @List, 1, @LenString )
                    --print(substring( @List, 1, @LenString ))
                    -------------
                    declare @SecondList      varchar(8000)
                    DECLARE @LenStringSecond int
                    set @SecondList =substring( @List, 1, @LenString )
                    WHILE len( @SecondList ) > 0
                         BEGIN
                        
                            SELECT @LenStringSecond =
                               (CASE charindex( @DelimiterSecond, @SecondList )
                                   WHEN 0 THEN len( @SecondList )
                                   ELSE ( charindex( @DelimiterSecond, @SecondList ) -1 )
                                END
                               )
                                 
                            IF SUBSTRING( @SecondList, 1, @LenStringSecond ) <> ''
                                BEGIN
                                    INSERT INTO @TableOfValues SELECT substring( @SecondList, 1, @LenStringSecond )
                                    --print(substring( @SecondList, 1, @LenStringSecond ))
                                END
                               
                            SELECT @SecondList =
                               (CASE ( len( @SecondList ) - @LenStringSecond )
                                   WHEN 0 THEN ''
                                   ELSE right( @SecondList, len( @SecondList ) - @LenStringSecond - 1 )
                                END
                               )
                         END
                    ---------
                END
               
            SELECT @List =
               (CASE ( len( @List ) - @LenString )
                   WHEN 0 THEN ''
                   ELSE right( @List, len( @List ) - @LenString - 1 )
                END
               )
         END
         
      RETURN
     
   END