ASP. NET MVC Exception Exception Interceptor Fillter

The handling of exception information is very important in the program, providing exception property interceptors to handle exception information in ASP. Exception interceptors have nothing to do, just write a class, Inherit another class (System.Web.Mvc.FilterAttribute) and an interface (System.Web.Mvc.IExceptionFilter), implement the interface inside the Onexception method.

code example:

Exception Interceptor Class:

1 usingSystem;2 usingSystem.Collections.Generic;3 usingSystem.Linq;4 usingsystem.web;5 6 namespaceAttributedemo.common7 {8     /// <summary>9     ///Exception Information InterceptorTen     /// </summary> One      Public classExceptionFillterAttribute:System.Web.Mvc.FilterAttribute, System.Web.Mvc.IExceptionFilter A     { -         #regionThis method is executed when the requested action exception occurs -         /// <summary> the         ///This method is executed when the requested action exception occurs -         /// </summary> -         /// <param name= "Filtercontext" ></param> -         voidSystem.Web.Mvc.IExceptionFilter.OnException (System.Web.Mvc.ExceptionContext filtercontext) +         { -             //Here you can record what you're going to do when something happens, proportional write log +             stringMessage =FilterContext.Exception.Message; Afiltercontext.controller.viewdata["errormessage"] =message; at  -             //returns the result to the client -Filtercontext.result =NewSystem.Web.Mvc.ContentResult () -             { -Content ="the error:)", -ContentEncoding =System.Text.Encoding.UTF8 in             }; -  to  +filtercontext.exceptionhandled =true;//tell the system that the exception has been handled and no more processing -  the             //filtercontext.exceptionhandled = false; //tell the system that this exception is not handled and needs to be processed *         } $         #endregionPanax Notoginseng  -  the     } +}

Controller class:

1 usingSystem;2 usingSystem.Collections.Generic;3 usingSystem.Linq;4 usingsystem.web;5 usingSYSTEM.WEB.MVC;6 7 namespaceattributedemo.controllers8 {9     /// <summary>Ten     ///Test exception Blocker One     /// </summary> A[AttributeDemo.Common.ExceptionFillter]//This exception intercept attribute is written here to indicate that all action exceptions to the controller are intercepted . -      Public classExceptionfilltertestcontroller:controller -     { the         // -         //GET:/exceptionfillter/ -  -         /// <summary> +         ///test for exception blocking -         /// </summary> +         /// <returns></returns> A         //[AttributeDemo.Common.ExceptionFillter]//This exception intercept attribute is written here to intercept only the exception information for the action. at          Publicactionresult testexceptionfillter () -         { -             inti =int. Parse ("SD");//This is intentionally throwing an exception for testing . -             returnView (); -         } -  in          Publicactionresult Index () -         { to             returnView (); +         } -  the     } *}

When the action name is called Testexceptionfillter, the action method throws an exception and executes the Onexception method inside the exception intercept class to handle the results, see:

ASP. NET MVC Exception Exception Interceptor Fillter