protected void Button1_Click(object sender, EventArgs e) { if (id != "") { string list = string.Empty; foreach (ListItem item in catelist.Items) { if (item.Selected) { list += item.Value + ","; } } if (list == "") { ClientScript.RegisterStartupScript(this.GetType(), "alert", "<script>alert('请选择任务分类!');</script>"); } else { BllShopUser bUer = new BllShopUser(); ModShopUser mUser = bUer.GetModel(id); mUser.CategoryId = list.TrimEnd(','); int i = bUer.Update(mUser); if (i > 0) { ClientScript.RegisterStartupScript(this.GetType(), "alert", "<script>alert('修改成功!');layer_close();</script>"); } else { ClientScript.RegisterStartupScript(this.GetType(), "alert", "<script>alert('修改失败!');</script>"); } } } }