无法建立连接，因为目标计算机被主动拒绝

Question

我是一个新的Asp.net Rest工作，我不知道如何解决这个问题，我已经在stackoverflow阅读了很多文章，没有人解决我的问题，我尝试了防火墙我尝试了互联网选项和其他的配置，我认为这个问题可能与令我困惑的事情有关，在运行我的客户端应用程序之前是否需要运行web服务？怎么做？因为我所做的只是编程我的休息应用程序然后我创建了我的asp.net mvc应用程序，我用这个帮助器连接到其余服务

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

using System.Net.Http;
namespace ClienteMvcProdutos.Helpers
{
    public static class WebApiHttpClient
    {
        public const string WebApiBaseAddress = "http://localhost:25426/";
        public static HttpClient GetClient()
        {
            HttpClient client = new HttpClient();
            client.BaseAddress = new Uri(WebApiBaseAddress);
            client.DefaultRequestHeaders.Accept.Clear();
            client.DefaultRequestHeaders.Accept.Add(
            new System.Net.Http.Headers.MediaTypeWithQualityHeaderValue("application/json"));
            return client;
        }
    }
}

已经检查了端口并且它们已经匹配，已经更改了端口，它仍然无法工作，我有点desesperating：S这里是我的stacktrace

  

[SocketException（0x274d）：Nenhumaligaçãopôdeserfeita porque o computador de destino   as recusou activamente 127.0.0.1:25426]      System.Net.Sockets.Socket.EndConnect（IAsyncResult asyncResult）+6604828      System.Net.ServicePoint.ConnectSocketInternal（Boolean connectFailure，Socket s4，Socket s6，Socket＆amp; socket，IPAddress＆amp; address，ConnectSocketState state，IAsyncResult asyncResult，Exception＆amp; exception）+249

     

[WebException：无法连接到远程服务器]
  System.Net.HttpWebRequest.EndGetResponse（IAsyncResult asyncResult）   +606 System.Net.Http.HttpClientHandler.GetResponseCallback（IAsyncResult ar）   64

     

[HttpRequestException：发送请求时发生错误。]
  System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess（任务   任务）+92
  System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（任务   任务）+58 System.Runtime.CompilerServices.TaskAwaiter 1.GetResult() +28 ClientMvcProdutos.Controllers.<Index>d__1.MoveNext() in C:\Users\Filipe\Documents\Visual Studio 2015\Projects\ClientMvcProdutos\ClientMvcProdutos\Controllers\ProdutosController.cs:25 System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) +92
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +58 System.Runtime.CompilerServices.TaskAwaiter.GetResult() +26 System.Threading.Tasks.TaskHelpersExtensions.ThrowIfFaulted(Task task) +42 System.Web.Mvc.Async.TaskAsyncActionDescriptor.EndExecute(IAsyncResult asyncResult) +73
System.Web.Mvc.Async.<>c__DisplayClass37.<BeginInvokeAsynchronousActionMethod>b__36(IAsyncResult asyncResult) +37
System.Web.Mvc.Async.WrappedAsyncResult 1.CallEndDelegate（IAsyncResult）   asyncResult）+27
  System.Web.Mvc.Async.WrappedAsyncResultBase 1.End() +58
System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +68
System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod(IAsyncResult asyncResult) +34
System.Web.Mvc.Async.AsyncInvocationWithFilters.<InvokeActionMethodFilterAsynchronouslyRecursive>b__3d() +69 System.Web.Mvc.Async.<>c__DisplayClass46.<InvokeActionMethodFilterAsynchronouslyRecursive>b__3f() +230 System.Web.Mvc.Async.<>c__DisplayClass33.<BeginInvokeActionMethodWithFilters>b__32(IAsyncResult asyncResult) +27
System.Web.Mvc.Async.WrappedAsyncResult 1.CallEndDelegate（IAsyncResult的   asyncResult）+27
  System.Web.Mvc.Async.WrappedAsyncResultBase 1.End() +58
System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +68
System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethodWithFilters(IAsyncResult asyncResult) +34
System.Web.Mvc.Async.<>c__DisplayClass2b.<BeginInvokeAction>b__1c() +42 System.Web.Mvc.Async.<>c__DisplayClass21.<BeginInvokeAction>b__1e(IAsyncResult asyncResult) +124
System.Web.Mvc.Async.WrappedAsyncResult 1.CallEndDelegate（IAsyncResult的   asyncResult）+27
  System.Web.Mvc.Async.WrappedAsyncResultBase 1.End() +58
System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +30
System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +29
System.Web.Mvc.Controller.<BeginExecuteCore>b__1d(IAsyncResult asyncResult, ExecuteCoreState innerState) +27
System.Web.Mvc.Async.WrappedAsyncVoid 1.CallEndDelegate（IAsyncResult的   asyncResult）+48
  System.Web.Mvc.Async.WrappedAsyncResultBase 1.End() +58
System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +30
System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +21
System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +32 System.Web.Mvc.Controller.<BeginExecute>b__15(IAsyncResult asyncResult, Controller controller) +26
System.Web.Mvc.Async.WrappedAsyncVoid 1.CallEndDelegate（IAsyncResult的   asyncResult）+40
  System.Web.Mvc.Async.WrappedAsyncResultBase 1.End() +58
System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +30
System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +21 System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +29
System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.EndExecute(IAsyncResult asyncResult) +24
System.Web.Mvc.MvcHandler.<BeginProcessRequest>b__5(IAsyncResult asyncResult, ProcessRequestState innerState) +27
System.Web.Mvc.Async.WrappedAsyncVoid 1.CallEndDelegate（IAsyncResult的   asyncResult）+48
  System.Web.Mvc.Async.WrappedAsyncResultBase`1.End（）+58
  System.Web.Mvc.Async.AsyncResultWrapper.End（IAsyncResult asyncResult，   对象标签）+30
  System.Web.Mvc.Async.AsyncResultWrapper.End（IAsyncResult asyncResult，   对象标签）+21
  System.Web.Mvc.MvcHandler.EndProcessRequest（IAsyncResult asyncResult）   +29 System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest（IAsyncResult）   结果）+23
  System.Web.CallHandlerExecutionStep.OnAsyncHandlerCompletion（IAsyncResult的   ar）+129