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Written By:-Isha Malhotra
Email:-malhotra.isha3388@gmail.com
How to create single
event for multiple Button or LinkButton
In my last article
I discussed how we create event for control which we generate at runtime. In this
article I am discussing how to create a single event for multiple controls and
how we access all control through single even.
Just remember
the example for searching where a list is showing with alphabet and on which
alphabet we click the list generated according to it.
I am taking
the same example here.
Figure 1
If you see
the figure then you came to know about the example which I am taking here. I want
on which link I will click it will show me data according to it.
If you think
that we have to create event for each single link then that’s totally wrong. If
you remember that when we create any event it takes two arguments one is Object
type and another is EventArgs. I will solve this example with the help of
parameter type Object. This parameter holds the object of current control
through which we fire this event.
For Example:-
Check the
following code (you can also do this task by generating control at runtime as I
did in previous example. But here I am not taking any runtime control)
Default.aspx
<%@ Page
Language="C#"
AutoEventWireup="true"
CodeFile="Default.aspx.cs"
Inherits="_Default"
%>
<!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></title>
</head>
<body>
<form id="form1" runat="server">
<table>
<tr>
<td>
<asp:LinkButton ID="LinkButton1"
runat="server"
onclick="LinkButton_Click">A</asp:LinkButton>
</td>
<td>
<asp:LinkButton ID="LinkButton2"
runat="server"
onclick="LinkButton_Click">B</asp:LinkButton>
</td>
<td>
<asp:LinkButton ID="LinkButton3"
runat="server"
onclick="LinkButton_Click">C</asp:LinkButton>
</td>
<td>
<asp:LinkButton ID="LinkButton4"
runat="server"
onclick="LinkButton_Click">D</asp:LinkButton>
</td>
<td>
<asp:LinkButton ID="LinkButton5"
runat="server"
onclick="LinkButton_Click">E</asp:LinkButton>
</td>
<td>
<asp:LinkButton ID="LinkButton6"
runat="server"
onclick="LinkButton_Click">F</asp:LinkButton>
</td>
<td>
<asp:LinkButton ID="LinkButton7"
runat="server"
onclick="LinkButton_Click">G</asp:LinkButton>
</td>
<td>
<asp:LinkButton ID="LinkButton8"
runat="server"
onclick="LinkButton_Click">H</asp:LinkButton>
</td>
<td>
<asp:LinkButton ID="LinkButton9"
runat="server"
onclick="LinkButton_Click">I</asp:LinkButton>
</td>
<td>
<asp:LinkButton ID="LinkButton10"
runat="server"
onclick="LinkButton_Click">J</asp:LinkButton>
</td>
<td>
<asp:LinkButton ID="LinkButton11"
runat="server"
onclick="LinkButton_Click">k</asp:LinkButton>
</td>
<td>
<asp:LinkButton ID="LinkButton12"
runat="server"
onclick="LinkButton_Click">L</asp:LinkButton>
</td>
<td>
<asp:LinkButton ID="LinkButton13"
runat="server"
onclick="LinkButton_Click">M</asp:LinkButton>
</td>
<td>
<asp:LinkButton ID="LinkButton14"
runat="server"
onclick="LinkButton_Click">N</asp:LinkButton>
</td>
<td>
<asp:LinkButton ID="LinkButton15"
runat="server"
onclick="LinkButton_Click">O</asp:LinkButton>
</td>
<td>
<asp:LinkButton ID="LinkButton16"
runat="server"
onclick="LinkButton_Click">P</asp:LinkButton>
</td>
<td>
<asp:LinkButton ID="LinkButton17"
runat="server"
onclick="LinkButton_Click">Q</asp:LinkButton>
</td>
<td>
<asp:LinkButton ID="LinkButton18"
runat="server"
onclick="LinkButton_Click">R</asp:LinkButton>
</td>
<td>
<asp:LinkButton ID="LinkButton19"
runat="server"
onclick="LinkButton_Click">S</asp:LinkButton>
</td>
<td>
<asp:LinkButton ID="LinkButton20"
runat="server"
onclick="LinkButton_Click">T</asp:LinkButton>
</td>
<td>
<asp:LinkButton ID="LinkButton21"
runat="server"
onclick="LinkButton_Click">U</asp:LinkButton>
</td>
<td>
<asp:LinkButton ID="LinkButton22"
runat="server"
onclick="LinkButton_Click">V</asp:LinkButton>
</td>
<td>
<asp:LinkButton ID="LinkButton23"
runat="server"
onclick="LinkButton_Click">W</asp:LinkButton>
</td>
<td>
<asp:LinkButton ID="LinkButton24"
runat="server"
onclick="LinkButton_Click">X</asp:LinkButton>
</td>
<td>
<asp:LinkButton ID="LinkButton25"
runat="server"
onclick="LinkButton_Click">Y</asp:LinkButton>
</td>
<td>
<asp:LinkButton ID="LinkButton26"
runat="server"
onclick="LinkButton_Click">Z</asp:LinkButton>
</td>
</tr>
</table>
</form>
</body>
</html>
Default.aspx.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class _Default :
System.Web.UI.Page
{
protected void
Page_Load(object sender, EventArgs e)
{
}
protected void
LinkButton_Click(object sender, EventArgs e)
{
string strchar = ((LinkButton)(sender)).Text;
Response.Write("You have Searched for
" + strchar);
}
}
As we know that object type sender holds the object of
current control through which we fire event. So I convert this sender into
linkbutton and after that I picked its text. Now you can use this text in any
query or according to this text you can also perform any task. Apart from this
now you can access any property of that linkbutton like id etc.
Output:-
Figure 2
Hope you enjoyed the article.
Fantastic blog you got here,I enjoyed reading some of your posts.
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