how to compare with checkbox in gridview

you can check these link ^^^

Hope be helpful,
Theingi Win

if (GridvView1.Rows.Count > 0)
{
	GridViewRowCollection rc = GridvView1.Rows;
	foreach (GridViewRow gRow in rc)
	{
		CheckBox cBox = (CheckBox)(gRow.FindControl("chkSelect"));

		if (cBox.Checked == true)
		{
			//comparisions to be made &
			//if u want to save any values then use some or 
			//static variables    
		}
	}
}

Hi Sanjay

If this solution is useful for you then please vote.
In this code you have to write manually Checked Changed event.

Example-----

 <asp:Templatefield headertext="Check" >
         <itemtemplate> 
<asp:checkbox id="Chk1" runat="server" autopostback="True"
                  oncheckedchanged="chk1_CheckedChanged" />                  
         </itemtemplate> 

In this code you have to write manually "oncheckedchanged="chk1_CheckedChanged" you have to change only your check box name here is check box name is "chk1"
Now the below is the code behind the event.

 protected void chk1_CheckedChanged(object sender, EventArgs e)
    {
        GridViewRow selectedRow = (GridViewRow)((CheckBox)sender).NamingContainer;
        int RowIndex = selectedRow.RowIndex;
Label lbl_A = (Label)GridView1.Rows[RowIndex].FindControl("lbl_A");
}

In this back end code you can find control and perform any operation on the check box checked event.

If you have any doubt please ask.