Checkbox state resets on postback

Question

I want to get the or of all checkboxes in a gridview after a button click. 或 。
But none of the checkbox is returning even if i check them. 。
Please write me the reason and solution.Thanks in Advance

protected void Button1_Click(object sender, EventArgs e)
        {
            foreach(GridViewRow r in GridView1.Rows)
            {
                Boolean b = ((CheckBox)GridView1.Rows[r.RowIndex].Cells[0].FindControl("cbox")).Checked;
                Response.Write(b);
            }
        }

Answer 1

The problem is likely that you are Rebinding the data on page load (which happens before control events).

Try wrapping your binding methods in

If (!IsPostBack)
{
    //Load  Data
}

EDIT:

Useful link is useful: http://msdn.microsoft.com/en-us/library/ms178472.aspx#lifecycle_events