Question

当ModelState在控制器中无效时，我想调用“OnFailure”。

在我的LoginView中

 @using (Ajax.BeginForm("Login", new AjaxOptions { HttpMethod = "POST", UpdateTargetId = "Login",InsertionMode = InsertionMode.Replace, OnSuccess = "Success", OnFailure = "onError" }))
 {

 }

在控制器

中

[httpPost]
public ViewResult Login(LoginModel model)
{
   if (ModelState.IsValid)
   {

   }
   else
   { 
     ModelState.AddModelError("login is fail")
   }
   return View("Login",model)
}

所以我希望调用onSuccess方法，如果ModelState有效，如果失败，则只调用OnError方法，显示模型状态的所有错误。

Answer 1

以下是您可以做的事情：

[HttpPost]
public ActionResult Login(LoginModel model)
{
    if (ModelState.IsValid)
    {
        // everything went fine and we want to redirect in this case =>
        // we pass the url we want to redirect to as a JSON object:
        return Json(new { redirectTo = Url.Action("SomeController", "SomeAction") });
    }
    else
    { 
        // there was an error => add an error message
        ModelState.AddModelError("login is fail")
    }

    // return a partial view instead of a full vire
    return PartialView("Login",model)
}

然后您只需要成功功能：

@using (Ajax.BeginForm("Login", new AjaxOptions { HttpMethod = "POST", OnSuccess = "loginAjaxSuccess" }))
{

}

你可以测试你在哪种情况下：

function loginAjaxSuccess(result) {
    if (result.redirectTo) {
        // the controller action returned a JSON result => it was a successful login
        // => we redirect the browser to this url
        window.location.href = result.redirectTo;
    } else {
        // the action returned a partial view with the form containing the errors
        // => we need to update the DOM:
        $('#Login').html(result);
    }
}

顺便说一下，如果您在刷新表单的情况下使用不显眼的客户端验证，则需要手动强制解析新的验证规则，否则下次尝试提交表单时，客户端验证不起作用：

} else {
    // the action returned a partial view with the form containing the errors
    // => we need to update the DOM
    $('#Login').html(result);

    // Now that the DOM is updated let's refresh the unobtrusive validation rules on the form:
    $('form').removeData('validator');
    $('form').removeData('unobtrusiveValidation');
    $.validator.unobtrusive.parse('form');
}

Answer 2

当您在ModelState中检测到问题时，将响应对象的StatusCode设置为400（您可以从System.Net.HttpStatusCode类中获取代码）

这将触发onfailure方法。

的Si

当ModelState为InValid时调用Ajax.BeginForm OnFailure

2 个答案: