protected void btnHistory_Click(object sender, EventArgs e) { PlaceHolder1.Visible = false; PlaceHolder2.Visible = false; PlaceHolder3.Visible = false; MemberLogic ml = new MemberLogic(); DataTable tblLoanHistory; tblLoanHistory = ml.GetLoanHistoryTable((int)Session["User_Id"]); GridView1.DataSource = tblLoanHistory; GridView1.DataBind(); }