业务场景：
业务需求要求，需要对 WebApi 接口服务统一返回参数，也就是把实际的结果用一定的格式包裹起来，比如下面格式：
{"response":{"code":200,"msg":"Remote service error","result":""}}
具体实现：
using Microsoft.AspNetCore.Mvc;using Microsoft.AspNetCore.Mvc.Filters;public class WebApiResultMiddleware : ActionFilterAttribute{public override void OnResultExecuting(ResultExecutingContext context){//根据实际需求进行具体实现if (context.Result is ObjectResult){var objectResult = context.Result as ObjectResult;if (objectResult.Value == null){context.Result = new ObjectResult(new { code = 404, sub_msg = "未找到资源", msg = "" });}else{context.Result = new ObjectResult(new { code = 200, msg = "", result = objectResult.Value });}}else if (context.Result is EmptyResult){context.Result = new ObjectResult(new { code = 404, sub_msg = "未找到资源", msg = "" });}else if (context.Result is ContentResult){context.Result = new ObjectResult(new { code = 200, msg = "", result= (context.Result as ContentResult).Content });}else if (context.Result is StatusCodeResult){context.Result = new ObjectResult(new { code = (context.Result as StatusCodeResult).StatusCode, sub_msg = "", msg = "" });}}}
Startup添加对应配置：
public void ConfigureServices(IServiceCollection services){services.AddMvc(options =>{options.Filters.Add(typeof(WebApiResultMiddleware));options.RespectBrowserAcceptHeader = true;});}
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