MVC中的错误-友好的处理方法
2011-06-28 14:14 smat 阅读(1146) 评论(0) 编辑 收藏 举报mvc中经常报的错误:
“/”应用程序中的服务器错误。
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版本信息: Microsoft .NET Framework 版本:4.0.30319; ASP.NET 版本:4.0.30319.1
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MVC中,有一个Filter可以捕捉错误,但是它的用法是利用Attribute来实现的,而且只能加在Controller和Action上,所以不能捕捉别出的错误
其实理论上所有的错误肯定产生于Controller中,但有2种情况下,就不会被捕捉了
1、页面不存在的时候,找不到对应的Controller,那没有任何Controller被执行,所以自然也不会捕捉到错误了
2、在 IAuthorizationFilter 下发生错误的时候,错误捕捉代码在IExceptionFilter中,而IAuthorizationFilter的优先权高于IExceptionFilter,所以也就捕捉不到了
protected void Application_Error(object sender, EventArgs e)
{
Exception exception = Server.GetLastError();
Response.Clear();
HttpException httpException = exception as HttpException;
RouteData routeData = new RouteData();
routeData.Values.Add("controller", "Error");
if (httpException == null)
{
routeData.Values.Add("action", "Index");
}
else //It's an Http Exception, Let's handle it.
{
switch (httpException.GetHttpCode())
{
case 404:
// Page not found.
routeData.Values.Add("action", "HttpError404");
break;
case 500:
// Server error.
routeData.Values.Add("action", "HttpError500");
break;
// Here you can handle Views to other error codes.
// I choose a General error template
default:
routeData.Values.Add("action", "General");
break;
}
}
// Pass exception details to the target error View.
routeData.Values.Add("error", exception.Message);
// Clear the error on server.
Server.ClearError();
// Call target Controller and pass the routeData.
IController errorController = new WEB.Controllers.ErrorController();
errorController.Execute(new RequestContext(
new HttpContextWrapper(Context), routeData));
}
Exception exception = Server.GetLastError();
Response.Clear();
HttpException httpException = exception as HttpException;
RouteData routeData = new RouteData();
routeData.Values.Add("controller", "Error");
if (httpException == null)
{
routeData.Values.Add("action", "Index");
}
else //It's an Http Exception, Let's handle it.
{
switch (httpException.GetHttpCode())
{
case 404:
// Page not found.
routeData.Values.Add("action", "HttpError404");
break;
case 500:
// Server error.
routeData.Values.Add("action", "HttpError500");
break;
// Here you can handle Views to other error codes.
// I choose a General error template
default:
routeData.Values.Add("action", "General");
break;
}
}
// Pass exception details to the target error View.
routeData.Values.Add("error", exception.Message);
// Clear the error on server.
Server.ClearError();
// Call target Controller and pass the routeData.
IController errorController = new WEB.Controllers.ErrorController();
errorController.Execute(new RequestContext(
new HttpContextWrapper(Context), routeData));
}
把这段代码放到 Global.asax 中,并且新建一个 Controller 叫做 Error
namespace MVC.Controllers
{
public class ErrorController : Controller
{
public ActionResult Index(string error)
{
ViewData["Title"] = "WebSite 网站内部错误";
ViewData["Description"] = error;
return View("Index");
}
public ActionResult HttpError404(string error)
{
ViewData["Title"] = "HTTP 404- 无法找到文件";
ViewData["Description"] = error;
return View("Index");
}
public ActionResult HttpError500(string error)
{
ViewData["Title"] = "HTTP 500 - 内部服务器错误";
ViewData["Description"] = error;
return View("Index");
}
public ActionResult General(string error)
{
ViewData["Title"] = "HTTP 发生错误";
ViewData["Description"] = error;
return View("Index");
}
}
}
public class ErrorController : Controller
{
public ActionResult Index(string error)
{
ViewData["Title"] = "WebSite 网站内部错误";
ViewData["Description"] = error;
return View("Index");
}
public ActionResult HttpError404(string error)
{
ViewData["Title"] = "HTTP 404- 无法找到文件";
ViewData["Description"] = error;
return View("Index");
}
public ActionResult HttpError500(string error)
{
ViewData["Title"] = "HTTP 500 - 内部服务器错误";
ViewData["Description"] = error;
return View("Index");
}
public ActionResult General(string error)
{
ViewData["Title"] = "HTTP 发生错误";
ViewData["Description"] = error;
return View("Index");
}
}
}
这样,就可以捕捉所有错误了。
但其实,这样也不是完美的,因为如果你参考了我第一个问题中,在IIS6下不修改IIS设置,运行了MVC,那当后缀名不是.aspx的时候,错误不会被捕捉
因为这时候输入的地址根本没有交给网站来处理,IIS直接抛出了错误,因为IIS认为这个后缀名不是你所能执行的.