我在类库项目HttpClient
中使用(.net4.0)
。为了实现这个目的,我为Bcl添加了nuget包
<?xml version="1.0" encoding="utf-8"?>
<packages>
<package id="Microsoft.AspNet.WebApi.Client" version="4.0.30506.0" targetFramework="net40" />
<package id="Microsoft.Bcl" version="1.1.10" targetFramework="net40" />
<package id="Microsoft.Bcl.Async" version="1.0.168" targetFramework="net40" />
<package id="Microsoft.Bcl.Build" version="1.0.14" targetFramework="net40" />
<package id="Microsoft.Net.Http" version="2.2.29" targetFramework="net40" />
<package id="Newtonsoft.Json" version="4.5.6" targetFramework="net40" />
</packages>
但我仍然收到错误消息
&#34;严重级代码说明项目文件行抑制状态错误CS1061&#39;任务&#39;不包含定义 为了GetAwaiter&#39;没有扩展方法&#39; GetAwaiter&#39;接受一个 类型&#39;任务&#39;的第一个参数可以找到(是 你错过了using指令或程序集引用?)&#34;
我正在使用的代码在
之下private async Task<bool> Login()
{
try
{
var status = false;
using (HttpClient client = new HttpClient())
{
client.DefaultRequestHeaders.Add("username", _userName);
client.DefaultRequestHeaders.Add("password", _password);
using (HttpResponseMessage response = await client.PostAsync(_url, null))
{
if (response.StatusCode == System.Net.HttpStatusCode.OK)
{
var contents = await response.Content.ReadAsStringAsync();
AuthenticationResult result = JsonHelper.DeserializeJson<AuthenticationResult>(contents);
if (result != null) _authToken = result.authToken;
}
}
}
return status;
}
catch (Exception ex)
{
return false;
}
}
奇怪的是,如果我将项目输出类型更改为Windows Application
,则错误消失并开始工作。仅当项目为Class Library