在ASP.NET 5中使用WebClient [英] Using WebClient in ASP.NET 5

问题描述

我正在VS15 beta中工作，并尝试使用WebClient.虽然引用了System.Net，并且智能提示建议WebClient类可用，但是在构建时出现以下错误:

I am working in the VS15 beta and trying to use WebClient. While System.Net is referenced, and the intellisense suggests the WebClient class is available, on build I get the following error:

名称空间"System.Net"中不存在类型或名称空间名称"WebClient"(是否缺少程序集引用?)MyProj.ASP.NET Core 5.0 HomeController.cs

The type or namespace name 'WebClient' does not exist in the namespace 'System.Net' (are you missing an assembly reference?) MyProj.ASP.NET Core 5.0 HomeController.cs

我正在执行以下简单代码:

I am doing the following simplistic code:

var client = new System.Net.
var html = client.DownloadString(url);

当我转到Web Client的定义时，它向我显示了源代码.不太清楚问题出在哪里-WebClient是否移动了?我正在努力寻找解决方案.

When I go to the definition of Web Client, it shows me the source. Not quite sure what the issue is - is WebClient moved? I am struggling to find the resolution.

谢谢！

推荐答案

不确定WebClient，但是您也可以使用System.Net.Http.HttpClient发出Web请求.

Not sure about WebClient, but you can use System.Net.Http.HttpClient to make web requests as well.

将这些引用添加到project.json:

"frameworks": {
    "aspnet50": {
        "frameworkAssemblies": {
            "System.Net.Http": "4.0.0.0"
        }
    },
    "aspnetcore50": {
        "dependencies": {
            "System.Net.Http": "4.0.0-beta-*"
        }
    }
},

然后是从MVC 6操作方法调用它的方法:

And then here's how to call it from an MVC 6 action method:

using System.Net.Http;
using System.Net.Http.Headers;
using System.Threading.Tasks;
using Microsoft.AspNet.Mvc;

namespace WebApplication50.Controllers
{
    public class HomeController : Controller
    {
        public async Task<IActionResult> Index()
        {
            var httpClient = new HttpClient();
            httpClient.DefaultRequestHeaders.UserAgent.Add(new ProductInfoHeaderValue("MyClient", "1.0"));
            var result = await httpClient.GetStringAsync("http://www.microsoft.com");

            ...

            return View();
        }
    }
}

这篇关于在ASP.NET 5中使用WebClient的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！