MVC WebAPI框架里设置异常返回格式统一

webApi里设置全局异常返回格式
今天为了设置api返回格式统一，在网上找了一推资料，各种资料参差不齐的，最后自己捣鼓，终于弄出来了，直接上代码

/// <summary>

/// 消息代理处理，用来捕获这些特殊的异常信息

/// </summary>

public class CustomErrorMessageDelegatingHandler : DelegatingHandler

{

protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)

{

return base.SendAsync(request, cancellationToken).ContinueWith<HttpResponseMessage>((responseToCompleteTask) =>

{

HttpResponseMessage response = responseToCompleteTask.Result;

HttpError error = null;

if (response.TryGetContentValue<HttpError>(out error))

{

//自定义错误处理

//error.Message = "这个接口调用出错了";

}

if (error != null)

{ //这是本人创建的一个返回类

var resultMsg = new ResultMsg { StatusCode = (int)StatusCodeEnum.HttpUrlEror, Info =error.MessageDetail };

return new HttpResponseMessage { Content = new StringContent(resultMsg.ToJson(),

System.Text.Encoding.GetEncoding("UTF-8"), "application/json"), StatusCode = HttpStatusCode.OK };

}

else

{

return response;

}

});

}

}

　　

然后就是注册该cs文件，找到Global.asax文件

protected void Application_Start()

{

AreaRegistration.RegisterAllAreas();

//FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);

//RouteConfig.RegisterRoutes(RouteTable.Routes);

//BundleConfig.RegisterBundles(BundleTable.Bundles);

GlobalConfiguration.Configure(WebApiConfig.Register);

GlobalConfiguration.Configuration.Filters.Add(new ErrorHandler());

}

　　

最后大功告成，效果：

{

"StatusCode": 404,

"Info": "在控制器“StudyTask”上找不到与该请求匹配的操作。",

"Data": null

}