HttpClient IsComplete 总是 return false

Question

我正在尝试授权用户使用 HttpClient GetAsync 方法从远程 xml Web 服务获取数据。不幸的是，无论服务器在 Controller 中回答 result.IsCompleted 总是 return false。我做错了什么？
这是控制器：

[HttpPost]
        [AllowAnonymous]
        [ValidateAntiForgeryToken]
        public ActionResult Login(CredentialsViewModel model)
        {
            if (!ModelState.IsValid) return View("Login");
            var result = ar.AuthenticateUser(model.UserName, model.Password);
            if (!result.IsCompleted)
            {
                ModelState.AddModelError("CustomError", "Вход в систему с указанными логином и паролем невозможен");
                return View("Login");
            }
            FormsAuthentication.SetAuthCookie(model.UserName, false);
            return RedirectToAction("Index", "Home");
        }

如果授权成功，这是实际上必须 return 布尔值的存储库。

public async Task<bool> AuthenticateUser(string login, string password)
        {
            const string url = @"http://somehost.ru:5555/api/getcountries";
            var client = new HttpClient();
            var encoded = Convert.ToBase64String(Encoding.ASCII.GetBytes(String.Format("{0}:{1}", login, password)));
            client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic", encoded);
            var result = await client.GetAsync(url);
            if (result.IsSuccessStatusCode) return true;
            return false;
        }

Answer 1

您的控制器操作需要 return 一个任务，因为所有异步方法都需要链接起来。

Turtles all the way down 帮我记起来:)

[HttpPost]
[AllowAnonymous]
[ValidateAntiForgeryToken]
public async Task<ActionResult> Login(CredentialsViewModel model)
{
    if (!ModelState.IsValid) return View("Login");
    var result = await ar.AuthenticateUser(model.UserName, model.Password);
    if (!result.IsCompleted)
    {
        ModelState.AddModelError("CustomError", "Вход в систему с указанными логином и паролем невозможен");
        return View("Login");
    }
    FormsAuthentication.SetAuthCookie(model.UserName, false);
    return RedirectToAction("Index", "Home");
}

HttpClient IsComplete 总是 return false

HttpClient IsComplete always return false

c#

asp.net

asp.net-mvc

asynchronous

dotnet-httpclient