c# - [通用 Windows 平台] 中的 System.Net.Http.HttpClient 无法正常工作

Question

我编写了从（在线）REST 服务获取数据的简单方法：

    public async Task<Object> GetTask()
    {
        try
        {
            using (HttpClient client = new HttpClient())
            {
                client.BaseAddress = new Uri("http://111.111.111.111:8080/");
                HttpResponseMessage result = await client.GetAsync("ABC/CDE/getsomeinfo");
                if (result.IsSuccessStatusCode)
                {
                    //Deserialize
                }
            }
        }
        catch (Exception ex)
        {
            Debug.WriteLine("Error" + ex);
        }

        return null;
    }

每当我在 UWP 上运行它时，我都会遇到异常：

找不到与此错误代码关联的文本。

无法建立与服务器的连接

H结果 2147012867

我试图将我的客户端与内部网络中的 restapi 连接起来。在表单中，相同的代码工作正常。

Answer 1

尝试这个

HttpResponseMessage response;

public async Task<string> webserviceResponse(string HttpMethod)
{      
    // check internet connection is available or not   

    if (NetworkInterface.GetIsNetworkAvailable() == true)
    {
       // CancellationTokenSource cts = new CancellationTokenSource(2000); // 2 seconds
        HttpClient client = new HttpClient();
        MultipartFormDataContent mfdc = new MultipartFormDataContent();
        mfdc.Headers.ContentDisposition = new ContentDispositionHeaderValue("form-data");
        string GenrateUrl = "your url";

        if (HttpMethod == "POST")
        {
            response = await client.PostAsync(GenrateUrl, mfdc);

        }
        else if (HttpMethod == "PUT")
        {
            response = await client.PutAsync(GenrateUrl, mfdc);
        }
        else if (HttpMethod == "GET")
        {
            response = await client.GetAsync(GenrateUrl);
        }
        var respon = await response.Content.ReadAsStringAsync();
        string convert_response = respon.ToString();
        return convert_response;
    }
    else
    {
        return "0";
    }
}