private void BindGrid() { objAttachmentcls = new AttachmentCls(); DataTable dt = objAttachmentcls.GetAllLibrary(); if (dt.Rows.Count > 0) { gvData.DataSource = dt; gvData.DataBind(); } else { ScriptManager.RegisterStartupScript(this, typeof(Page), "alert", "alert('Data not found');", true); } }