Question

我正在尝试连接到安全网页以获取响应时间：但是，我一直收到此错误

基础连接已关闭：发送时发生意外错误。 - System.IO.IOException：无法从传输连接读取数据：远程主机强制关闭现有连接。

这是代码

static void Main（string [] args） {

string url = "some url"; 
ServicePointManager.ServerCertificateValidationCallback = 
    new RemoteCertificateValidationCallback((sender, certificate, chain, policyErrors) => { return true; });//requires that .NEt 4.5 be installed but not targeted

string fileName = "file ocation";//<--Example
WebClient WC = new WebClient();
DateTime currentDateTime = DateTime.Now;
string x = "";

ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3;

StreamWriter writer = new StreamWriter(fileName, true);

try
{
    HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
    Stopwatch timer = new Stopwatch();
    timer.Start();
    HttpWebResponse response = (HttpWebResponse)request.GetResponse();
    timer.Stop();
    TimeSpan timeTaken = timer.Elapsed;
    writer.WriteLine(currentDateTime.ToString() + " - " + timeTaken.ToString());
    writer.Close();
}
catch (WebException ex)
{
    writer.WriteLine(currentDateTime.ToString() + " " + ex.Message + " - " + ex.InnerException.ToString(), true);
}

}

Answer 1

解决了它。我不明白为什么代码错误;然而，因为我使用VS 2010它只能达到.net 4.0。因此，SecurityProtocol缺少枚举。一旦我为缺失的枚举转换了整数，它就可以了

ServicePointManager.SecurityProtocol =（SecurityProtocolType）48 | （SecurityProtocolType）192 | （SecurityProtocolType）768 | （SecurityProtocolType）3072; ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback（（sender，certificate，chain，policyErrors）=＆gt; {return true;}）; //要求安装.NEt 4.5但不是目标

使用webrequest获得响应时间C＃

1 个答案: