protected void AddedGrid_OnRowDeleting(object sender, GridViewDeleteEventArgs e) { var dataKey = AddedGrid.DataKeys[e.RowIndex]; if (dataKey == null) { return; } var userId = dataKey.Value.ToString(); var departmentId = int.Parse(Request.QueryString[QueryStringParameters.DepartmentId]); _departmentDal.RemoveUser(departmentId, userId); RefreshGrid(); }