protected void grdInfo_NeedDataSource(object sender, GridNeedDataSourceEventArgs e) { if (txtCode.Text != "" || txtName.Text != "") { code = ViewState["code"].ToString(); name = ViewState["name"].ToString(); nimsal = ViewState["nimsal"].ToString(); dt = clsB.Show_Class_List_ByTerm(nimsal, Convert.ToInt32(code), name); grdInfo.DataSource = dt; } }