ASP.NET MVC3 异常处理 摘抄

比较乱，参考文末链接

使用 handleError attribute 有以下局限：

1. Not support to log the exceptions 不支持exception记录

2. Doesn't catch HTTP exceptions other than 500 无法捕捉到500之外的http exception

3. Doesn't catch exceptions that are raised outside controllers controller之外抛出的异常无法处理

4. Returns error view even for exceptions raised in AJAX calls ajax调用出现exception时，会将错误页面内容返回

其他方法

1 重写Controller的OnException方法,其他继承自BaseController的Controller

public class BaseController : Controller

{

protected override void OnException(ExceptionContext filterContext)

{

if(filtercontext==null)

return ;

var ex = filtercontext.exception??new exception("no further information exists");

logger.logerror(ex,"error general onexceipton");

filtercontext.exceptionhandled = true;

var data = {

errormessage = httputility.htmlencode(ex.message),

theexception = ex,

showmessage = !(filtercontext.exception==null),

showlink = false;

};

filtercontext.result = view("errorpage",data);

//base.OnException(filterContext);

}

}

2、创建FilterAttribute
通过FilterAttribute，并把它添加到全局过滤器集合中就可以提供给整个应用程序使用，如果只需要在某几个Action中使用，可以在Controller的Action中添加此特性。
Filter定义如下：
public class LogExceptionFilterAttribute : FilterAttribute, IExceptionFilter

{
public void OnException(ExceptionContext filterContext)
{
// 添加记录日志代码
}
}

如果要应用给所有的Controller的所有Action，在Global.asax.cs中实现下面代码即可：

public static void RegisterGlobalFilters(GlobalFilterCollection filters)  {
filters.Add(new LogExceptionFilterAttribute());
filters.Add(new HandleErrorAttribute());
}

或者给只需要使用此特性的Controller或Action添加 ：

[LogExceptionFilter()]
public ActionResult About()
{
throw new Exception("出错.");
}

3 使用 Elmah

4 global.asax 中添加如下事件

protected void Application_Error()
{
var exception = Server.GetLastError();
var httpException = exception as HttpException;
Response.Clear();
Server.ClearError();
var routeData = new RouteData();
routeData.Values["controller"] = "Errors";
routeData.Values["action"] = "General";
routeData.Values["exception"] = exception;
//httpContext.Response.StatusCode = ex is HttpException ? ((HttpException)ex).GetHttpCode() : 500;
Response.StatusCode = 500;
if (httpException != null)
{
Response.StatusCode = httpException.GetHttpCode();
switch (Response.StatusCode)
{
case 403:
routeData.Values["action"] = "Http403";
break;
case 404:
routeData.Values["action"] = "Http404";
break;
}
}
// Avoid IIS7 getting in the middle
Response.TrySkipIisCustomErrors = true;
IController errorsController = new ErrorsController();
HttpContextWrapper wrapper = new HttpContextWrapper(Context);
var rc = new RequestContext(wrapper, routeData);
errorsController.Execute(rc);
}

创建 ErrorController

public class ErrorsController : Controller
{
public ActionResult General(Exception exception)
{
return View("Exception",exception);
}

public ActionResult Http404()
{
return View("404");
}

public ActionResult Http403()
{
return View("403");
}
}

参考
http://blog.163.com/elgyin@126/blog/static/189426202011101510232757/ http://www.prideparrot.com/blog/archive/2012/5/exception_handling_in_asp_net_mvc http://www.codeproject.com/Articles/422572/Exception-Handling-in-ASP-NET-MVC http://www.cnblogs.com/TomXu/archive/2011/12/15/2285432.html