protected void BtnFind_Click(object sender, EventArgs e) { dt4 = obj.CheckPD(txtdate.Text, txttill.Text, Convert.ToInt32(ddnclass.SelectedValue), Convert.ToInt32(ddnsection.SelectedValue)); gvdetails.DataSource = dt4; gvdetails.DataBind(); dt5 = obj.CheckAD(txtdate.Text, txttill.Text, Convert.ToInt32(ddnclass.SelectedValue), Convert.ToInt32(ddnsection.SelectedValue)); gvdetails1.DataSource = dt5; gvdetails1.DataBind(); }