protected void btnEditUsergroup_Click(object sender, EventArgs e) { if (gridUser.Selection.Count <= 0) { JSHelper.Alert("请至少选择一个用户!", this); } else { if (Session["UserIDList"] != null) { Session.Remove("UserIDList"); } List <object> keyValues = gridUser.GetSelectedFieldValues("USERID"); Session["UserIDList"] = keyValues; JSHelper.ShowModalDialogWindow("EditUserGroup.aspx", 300, 200, 300, 450, this); } }