等待httpclient(Awaiting httpclient)

 这是代码 - 
 
 版本3：删除r.result但它仍然无法正常工作。 
 
protected async void LogIn(LoginInfo _credentials)
{
    HttpResponseMessage r = await DoLogin("demo", "Abc123$");

    if (r.IsSuccessStatusCode)
    {
        AccountAccess aa = new AccountAccess();

            var x = await r.Content.ReadAsStringAsync();

            aa = JsonConvert.DeserializeObject<AccountAccess>(x);
            Application.Current.Properties["access_token"] = aa.access_token;

    }
    else //if (lr == LoginResult.LoginRes.NoAuth)
    {
        Alert("Alert", "Username/password combination is incorrect", "OK");
    }
}

private async Task<HttpResponseMessage> DoLogin(string username, string password)
{
    HttpClient client = new HttpClient();
    client.BaseAddress = new Uri(Constants.LOGINURL);

    var response = await client.PostAsync("Token", new StringContent("grant_type=password&username=" + username + "&password=" + password, Encoding.UTF8));

    return response;
}
 
 等待调用以发布用户名和密码并获取令牌永远不会返回。 
 
 我做错了吗？ 

Here is the code -
 
VERSION 3: Remove r.result and it still doesn't work.
 
protected async void LogIn(LoginInfo _credentials)
{
    HttpResponseMessage r = await DoLogin("demo", "Abc123$");

    if (r.IsSuccessStatusCode)
    {
        AccountAccess aa = new AccountAccess();

            var x = await r.Content.ReadAsStringAsync();

            aa = JsonConvert.DeserializeObject<AccountAccess>(x);
            Application.Current.Properties["access_token"] = aa.access_token;

    }
    else //if (lr == LoginResult.LoginRes.NoAuth)
    {
        Alert("Alert", "Username/password combination is incorrect", "OK");
    }
}

private async Task<HttpResponseMessage> DoLogin(string username, string password)
{
    HttpClient client = new HttpClient();
    client.BaseAddress = new Uri(Constants.LOGINURL);

    var response = await client.PostAsync("Token", new StringContent("grant_type=password&username=" + username + "&password=" + password, Encoding.UTF8));

    return response;
}
 
The await call to post the username and password and get a token never returns.
 
Am I doing something incorrect?

原文：https://stackoverflow.com/questions/37077953