protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { var dt = _entities.GetAllUser(); RadGrid1.DataSource = dt; RadGrid1.DataBind(); if (dt != null) { RadGrid1.Items[0].Selected = true; GridDataItem item = RadGrid1.Items[0]; Int32 IDNhanVien = Int32.Parse(item["IDNhanVien"].Text); FillCurrentEmployeeDetail(IDNhanVien); } } }