问题描述
我寻求一种显示抛出异常的通用方法，而无需重定向到错误页面，而是在同一视图中显示它.我在下面尝试过这些:
I search for a generic way to display thrown exceptions without redirecting to an error page but displaying it in the same view. I tried these below:
1)我首先尝试通过在global.asax中添加自定义过滤器并在我的Attribute类中覆盖 public overlay void OnException(ExceptionContext filterContext)来处理它们，但是这样，我无法因为视图的旧模型无法访问，所以以我想要的方式填充filterContext.Result，所以我只能重定向到错误页面，但这不是我想要的.
1) I firstly tried to handle them by adding a custom filter in global.asax and overriding public override void OnException(ExceptionContext filterContext) in my Attribute class but in that way, I couldn't fill filterContext.Result in the way I want since the old model of the view is not reachable so I could only redirect to an error page but that's not what I want.
2)然后，我尝试在 BaseController 上捕获异常(我所有的控制器都继承自该异常).我再次在控制器中重写 public重写void OnException(ExceptionContext filterContext)并将异常详细信息等放入ViewBag中，并通过 filterContext.HttpContext.Response.Redirect(filterContext)将页面重定向到同一视图.RequestContext.HttpContext.Request.Path); ，但是ViewBag内容在重定向页面中丢失了，所以我想不出其他办法了?
2) Then I tried to catch the exceptions on my BaseController(All of my controllers inherits from it). I again override public override void OnException(ExceptionContext filterContext) in my controller and put exception details etc. in ViewBag and redirected the page to the same view by filterContext.HttpContext.Response.Redirect(filterContext.RequestContext.HttpContext.Request.Path ); but ViewBag contents are lost in the redirected page so I can't think any other way?
我该如何实现?我在 BaseController 中编写的代码示例如下:
How can I achieve that? Code Sample that I wrote in my BaseController is below:
protected override void OnException(ExceptionContext filterContext) {
var controllerName = (string)filterContext.RouteData.Values["controller"];
var actionName = (string)filterContext.RouteData.Values["action"];
//filterContext.Result = new ViewResult
//{
// ViewName = actionName,
// ViewData = new ViewDataDictionary<??>(??),
// TempData = filterContext.Controller.TempData,
//};
filterContext.ExceptionHandled = true;
filterContext.HttpContext.Response.Clear();
filterContext.HttpContext.Response.TrySkipIisCustomErrors = true;
ModelState.AddModelError("Error", filterContext.Exception.Message);
ViewBag.das = "dasd";
filterContext.HttpContext.Response.Redirect(filterContext.RequestContext.HttpContext.Request.Path);
}
推荐答案
我不久前找到了解决方案，并添加了解决方案，以便对其他人有所帮助.我使用TempData和_Layout来显示错误:
I found the solution a while ago and add the solution so that it may help the others. I use TempData and _Layout to display errors:
public class ErrorHandlerAttribute : HandleErrorAttribute
{
private ILog _logger;
public ErrorHandlerAttribute()
{
_logger = Log4NetManager.GetLogger("MyLogger");
}
public override void OnException(ExceptionContext filterContext)
{
if (filterContext.ExceptionHandled)
{
return;
}
if (!ExceptionType.IsInstanceOfType(filterContext.Exception))
{
return;
}
// if the request is AJAX return JSON else view.
if (filterContext.HttpContext.Request.Headers["X-Requested-With"] == "XMLHttpRequest")
{
filterContext.Result = new JsonResult
{
JsonRequestBehavior = JsonRequestBehavior.AllowGet,
Data = new
{
error = true,
message = filterContext.Exception.Message
}
};
filterContext.HttpContext.Response.StatusCode = 500;
}
// log the error using log4net.
_logger.Error(filterContext.Exception.Message, filterContext.Exception);
filterContext.ExceptionHandled = true;
filterContext.HttpContext.Response.Clear();
filterContext.HttpContext.Response.TrySkipIisCustomErrors = true;
if (filterContext.HttpContext.Request.Headers["X-Requested-With"] != "XMLHttpRequest")
{
if (filterContext.Controller.TempData["AppError"] != null)
{
//If there is a loop it will break here.
filterContext.Controller.TempData["AppError"] = filterContext.Exception.Message;
filterContext.HttpContext.Response.Redirect("/");
}
else
{
int httpCode = new HttpException(null, filterContext.Exception).GetHttpCode();
switch (httpCode)
{
case 401:
filterContext.Controller.TempData["AppError"] = "Not Authorized";
filterContext.HttpContext.Response.Redirect("/");
break;
case 404:
filterContext.Controller.TempData["AppError"] = "Not Found";
filterContext.HttpContext.Response.Redirect("/");
break;
default:
filterContext.Controller.TempData["AppError"] = filterContext.Exception.Message;
//Redirect to the same page again(If error occurs again, it will break above)
filterContext.HttpContext.Response.Redirect(filterContext.RequestContext.HttpContext.Request.RawUrl);
break;
}
}
}
}
}
在Global.asax中:
And in Global.asax:
protected void Application_Error(object sender, EventArgs e)
{
var httpContext = ((MvcApplication)sender).Context;
var ex = Server.GetLastError();
httpContext.ClearError();
httpContext.Response.Clear();
httpContext.Response.StatusCode = ex is HttpException ? ((HttpException)ex).GetHttpCode() : 500;
httpContext.Response.TrySkipIisCustomErrors = true;
var routeData = new RouteData();
routeData.Values["controller"] = "ControllerName";
routeData.Values["action"] = "ActionName";
routeData.Values["error"] = "404"; //Handle this url paramater in your action
((IController)new AccountController()).Execute(new RequestContext(new HttpContextWrapper(httpContext), routeData));
}
这篇关于如何在同一视图中显示例外?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！