WebApi 通过拦截器设置特定的返回格式

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/// Action执行之后由MVC框架调用         /// </summary>         /// <param name="actionExecutedContext"></param>         public override void OnActionExecuted(HttpActionExecutedContext actionExecutedContext)         {             var requestUrl = actionExecutedContext.Request.RequestUri.AbsolutePath;             if (requestUrl.Equals("/api/restful/order") && actionExecutedContext.Response != null               && actionExecutedContext.Response.StatusCode == HttpStatusCode.OK)             {<br>  　　　　　　　　//获取原始返回结果                 var datastr = actionExecutedContext.ActionContext.Response.Content.ReadAsAsync<object>().Result; <br>                //定义需要返回的格式类型                 var responseModel = new ResponseModel()                 {                     errormsg = "",                     requestId = ((Titan.Api.Web.Outside.RESTful.Model.ExtApiResultBase)datastr).RequestId                 };                 HttpResponseMessage result = new HttpResponseMessage                 {                     Content = new StringContent(JsonConvert.SerializeObject(responseModel),                     Encoding.GetEncoding("UTF-8"), "application/json")                 };                 actionExecutedContext.Response = result;             }             base.OnActionExecuted(actionExecutedContext);         }　 <br>}

public class ActionFilter : ActionFilterAttribute
{ 

       　 /// <summary>

最后需要在Global中配置     config.Filters.Add(new ActionFilter());