创建死锁的mvc5控制器中的异步函数

Question

我正在使用这个库为孟加拉国支付网关。https://github.com/Rahim373/Arts.SslCommerze .But代码在一个控制器等待iis无限的时间。如果响应是从服务器到达我的机器的话，我签入了fiddler。它已经够到了。但是异步函数没有执行。我的代码是：

public ActionResult About()
{
        string customerName = "Fahim Abrar";
        string customerEmail = "fahimabrar13@gmail.com";
        string customerPhone = "+8801853912845";
        string transactionId = "45c2ffc4d";
        string successUrl = "http://fahimabrar.com";
        string failUrl = "http://fahimabrar.com";
        string cancelUrl = "cancelUrl";
        decimal amount = 50;

        Customer customer = new Customer(customerName, customerEmail, 
        customerPhone);

        EmiTransaction emiTransaction = new 
        EmiTransaction(isEmiEnabled: false);

        Trasnaction trasnaction = new Trasnaction(amount, 
        transactionId, successUrl, failUrl,
            cancelUrl, emiTransaction, customer);

  SslRequest.GetSessionAsync(trasnaction).ConfigureAwait(continueOnCapturedContext: false);
        var session = SslRequest.GetSessionAsync(trasnaction).Result;
        string s = session.FailedReason;

        ViewBag.Message = s;
        //"Your application description page.";

        return View();
}

在这里，var session = SslRequest.GetSessionAsync(trasnaction).Result；--这一行将导致死锁。

Answer 1

.Result会导致死锁。

使您的方法async并使用await。

public async Task<ActionResult> About()
{
    string customerName = "Fahim Abrar";
    string customerEmail = "fahimabrar13@gmail.com";
    string customerPhone = "+8801853912845";
    string transactionId = "45c2ffc4d";
    string successUrl = "http://fahimabrar.com";
    string failUrl = "http://fahimabrar.com";
    string cancelUrl = "cancelUrl";
    decimal amount = 50;

    Customer customer = new Customer(customerName, customerEmail, 
    customerPhone);

    EmiTransaction emiTransaction = new 
    EmiTransaction(isEmiEnabled: false);

    Trasnaction trasnaction = new Trasnaction(amount, 
    transactionId, successUrl, failUrl,
        cancelUrl, emiTransaction, customer);

    var session = await SslRequest.GetSessionAsync(trasnaction);
    string s = session.FailedReason;

    ViewBag.Message = s;
    //"Your application description page.";

    return View();
}

请参阅：在ASP.NET MVC中使用异步方法