如何捕捉ServiceStack RequestBindingException

Question

我有一個RequestDto，它接受一個INT參數

[Route("/club/thread/{Id}","GET")] 
public MyDto{ 
    [Apimember(DataType="int32")] 
    public int Id{get;set;} 
} 

當我輸入http://myservice/club/thread/aaa.json，是拋出一個異常：

[RequestBindingException：無法綁定請求]

ServiceStack.WebHost.Endpoints.RestHandler.GetRequest（IHttpRequest httpReq，IRestPath restPath）538

ServiceStack.WebHost.Endpoints.RestHandler.ProcessRequest（IHttpRequest httpReq，IHttpResponse httpRes，字符串operationName）1023

System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute（）913

System.Web.HttpApplication.ExecuteStep（IExecutionStep一步，布爾& completedSynchronously）+ 165

AppHost.ExceptionHandler不能趕上這個例外，我怎樣才能抓住它？

Answer 1

請求綁定的異常是一個服務請求，從而得到由UncaughtExceptionHandlers處理可以在你的APPHOST登記的情況下才拋出未捕獲的異常：

public override void Configure(Container container) 
{ 
    //Custom global uncaught exception handling strategy 
    this.UncaughtExceptionHandlers.Add((req, res, operationName, ex) => 
    { 
     res.StatusCode = 400; 
     res.Write(string.Format("Exception {0}", ex.GetType().Name)); 
     res.EndRequest(skipHeaders: true); 
    }); 
} 

或者通過重寫你的APPHOST的OnUncaughtException方法，如：

public override void OnUncaughtException(
    IRequest httpReq, IResponse httpRes, string operationName, Exception ex) 
{ 
    "In OnUncaughtException...".Print(); 
    base.OnUncaughtException(httpReq, httpRes, operationName, ex); 
}