protected void btnAdd_Click(object sender, ImageClickEventArgs e) { Model.User u = new Model.User() { UserName= txtUid.Text,UserPassword=txtPwd.Text,AddTime=DateTime.Now}; if (String.IsNullOrEmpty(u.UserName)||String.IsNullOrEmpty(u.UserPassword)||!cvPwd.IsValid) { return; } u.UserPassword = Common.SecurityHelper.Encrypt(u.UserPassword); BLL.UserBLL helper = new BLL.UserBLL(); if (helper.ExistUserName(u.UserName)) { Response.Write("<script>alert('添加失败!该用户名已经存在')</script>"); return; } if (helper.Add(u)) { Response.Redirect("UserManage.aspx"); } else { Response.Write("<script>alert('添加失败!请稍后重试')</script>"); } }