Asp.net mvc MVC显示错误消息

我试图找到一种方法，将错误消息从我的控制器传递回我的视图

    public ActionResult Index()
    {
        ViewBag.splittingFileMessage = "Splitting File...";
        ViewBag.startBatchMessage = "Start Batch Processing : ";
        return View();
    }

    [HttpPost]
    public ActionResult Index(HttpPostedFileBase file)
    {
        var numberRecordsPerFile = int.Parse(ConfigurationManager.AppSettings["NumberRecordsPerFile"]);
        var inputFileFolder = ConfigurationManager.AppSettings["InputFileFolder"];

        var batchSplitterClient = new SplitterServiceClient();
        var batchSplitterResponse = 
            batchSplitterClient.SplitFile(new BatchSplitterRequest
            {
                FilePath = inputFileFolder, 
                NumberOfRecordsPerFile = numberRecordsPerFile
            });
        var numberOfMessages = batchSplitterResponse.NumberOfMessages;

        if (batchSplitterResponse.Result.ResultCode == 200)
        {
            return RedirectToAction("Progress");
        }
        else
        {
            ViewBag.error = "test error";
            return RedirectToAction("Index");
        }
    }

因此，您可以看到，在我的Httppost方法中，我试图设置一条错误消息，即ViewBag.error，如果它发生在我的WCF调用中

但在我看来，在初始负载上，这当然还并没有设置

我有我的观点

<div class="errors">
        <%: ViewBag.error %>
</div>

---

用户HandleErrorAttribute和错误页或验证错误的Elmah添加到Modelstate并使用错误页查找验证错误并显示

---

如果它回答了您的问题，请在左侧勾选右标记，使其得到回答

尝试将其转换为字符串

<div class="errors">
        <%: (string)ViewBag.error %>
</div>

或

ViewBag.error.ToString（）

操作方法级别的HandleError属性

[HandleError(View = "Error")]
public ActionResult Index()
{
    ViewBag.Message = "Welcome to ASP.NET MVC!";
    int u = Convert.ToInt32("");// Error line
    return View();
}

在全局级别定义HandleError属性

我们还可以通过在Application_Start事件中的global.asax中注册HandleError属性，在全局级别应用该属性

范例

public static void RegisterGlobalFilters(GlobalFilterCollection filters)
{
    filters.Add(new HandleErrorAttribute(), 2); //by default added


    filters.Add(new HandleErrorAttribute
    {
        View = "Error"
    }, 1);
}
protected void Application_Start()
{
    AreaRegistration.RegisterAllAreas();
    RegisterGlobalFilters(GlobalFilters.Filters);
    RegisterRoutes(RouteTable.Routes);
}

错误页

@model System.Web.Mvc.HandleErrorInfo
@{
    ViewBag.Title = "Error";
}
<h2>
    Sorry, an error occurred while processing your request.
    <br />
    Error :
</h2>
<p>
     @Model.Exception
</p>

public static void RegisterGlobalFilters(GlobalFilterCollection filters)
{
    filters.Add(new HandleErrorAttribute(), 2); //by default added


    filters.Add(new HandleErrorAttribute
    {
        View = "Error"
    }, 1);
}
protected void Application_Start()
{
    AreaRegistration.RegisterAllAreas();
    RegisterGlobalFilters(GlobalFilters.Filters);
    RegisterRoutes(RouteTable.Routes);
}

@model System.Web.Mvc.HandleErrorInfo
@{
    ViewBag.Title = "Error";
}
<h2>
    Sorry, an error occurred while processing your request.
    <br />
    Error :
</h2>
<p>
     @Model.Exception
</p>

[HandleError(ExceptionType = typeof(ApplicationException), View = "Error")]
public ActionResult Index()
{
    ViewBag.Message = "Welcome to ASP.NET MVC!";
    int u = Convert.ToInt32(""); // Error line
    return View();
}