.Net Core 3.1
我有一个ExceptionFilter,我想在其中传递带有RedirectResult的TempData值。
以下是我的代码:
public class CustomExceptionFilterAttribute : IExceptionFilter
{
private readonly ITempDataProvider _tempDataProvider;
public CustomExceptionFilterAttribute(ITempDataProvider tempDataProvider)
{
_tempDataProvider = tempDataProvider;
}
public void OnException(ExceptionContext context)
{
//Log The Exception here
//After Log
var url = context.HttpContext.Request.Path.ToUriComponent();
context.ExceptionHandled = true;
context.HttpContext.Response.Clear();
var tempData = new TempDataDictionary(context.HttpContext, _tempDataProvider);
tempData.Add("UserFriendlyMessage", "An Error Occured! Please contact Admin!");
tempData.Keep("UserFriendlyMessage"); //This didn't work either...
var result = new RedirectResult(url);
context.Result = result;
}
}
[TypeFilter(typeof(CustomExceptionFilterAttribute))]
public class MyController : Controller
{...
public IActionResult MyAction()
{
return View();
}
[HttpPost]
public IActionResult MyAction(MyModel model)
{
try
{
int a = 5;
int b = a / 0;
}
catch(Exception ex)
{
}
return View();
}
因此,如您在上面看到的,我的目标是将用户重定向到同一页面(发生异常的地方),并防止他们重定向500StatusCode错误页面。
实际上,这段代码将用户重定向为我想要的方式,但是 TempData 值未传递。
我尝试过:
-context.HttpContext.Response.Clear();
尝试了此代码,但没有此代码。
-tempData.Keep("UserFriendlyMessage");
尝试过此代码,但没有此代码。
答案 0 :(得分:1)
我已经弄清楚了,希望它能对遇到这种情况的人有所帮助。
我已删除ITempDataProvider
并放了ITempDataDictionaryFactory
。
public class CustomExceptionFilterAttribute : IExceptionFilter
{
private readonly ITempDataDictionaryFactory _tempDataFactory;
public CustomExceptionFilterAttribute(ITempDataDictionaryFactory tempDataFactory)
{
_tempDataFactory = tempDataFactory;
}
public void OnException(ExceptionContext context)
{
//Log The Exception here
//After Log
var url = context.HttpContext.Request.Path.ToUriComponent();
context.ExceptionHandled = true;
context.HttpContext.Response.Clear();
//-----------THIS WAS THE PART THAT HAS PROBLEM----------------
//var tempData = new TempDataDictionary(context.HttpContext, _tempDataProvider);
//tempData.Add("UserFriendlyMessage", "An Error Occured! Please contact Admin!");
//tempData.Keep("UserFriendlyMessage"); //This didn't work either...
//var result = new RedirectResult(url);
//context.Result = result;
//-------------------------------------------------------------
//I've changed it to:
var tempData = _tempDataDictionaryFactory.GetTempData(context.HttpContext);
tempData.Add("UserFriendlyMessage", "An Error Occured!");
var result = new RedirectResult(url);
context.Result = result;
}
}
注意::所以我认为错误的部分是我正在使用new TempDataDictionary
创建一个TempData的新实例,现在我使用的是 current TempData,
如果有人知道我在做什么错,请告诉我。 :)