“应用程序没有调用WSAStartup，或者WSAStartup失败”意味着什么？

Question

我正在尝试开发通过网络连接到网络服务器的软件；一切正常工作，直到尝试使用软线来保护我的软件。我的dongle有一些网络特性，它的API工作在网络基础设施下。wWhen --我在我的程序中添加了Dongle检查代码--我得到了以下错误：

"Either the application has not called WSAStartup, or WSAStartup failed"  

我将抛出异常的代码块放入其中。我得到的例外情况是:我登录到程序(一切正常)，然后插入dongle，然后程序停止并请求dongle，我再次插入dongle并尝试登录，但我在网上得到了一个异常。

响应= (HttpWebResponse)request.GetResponse()；

DongleService unikey = new DongleService();

                checkDongle = unikey.isConnectedNow();

                if (checkDongle)
                {
                    isPass = true;
                    this.username = txtbxUser.Text;
                    this.pass = txtbxPass.Text;
                    this.IP = combobxServer.Text;
                    string uri = @"https://" + combobxServer.Text + ":5002num_events=1";
                    request = (HttpWebRequest)WebRequest.Create(uri);
                    request.Proxy = null;
                    request.Credentials = new NetworkCredential(this.username, this.pass);
                    ServicePointManager.ServerCertificateValidationCallback = ((sender, certificate, chain, sslPolicyErrors) => true);
                    response = (HttpWebResponse)request.GetResponse();

                    Properties.Settings.Default.User = txtbxUser.Text;
                    int index = _servers.FindIndex(p => p == combobxServer.Text);
                    if (index == -1)
                    {
                        _servers.Add(combobxServer.Text);
                        Config_Save.SaveServers(_servers);
                        _servers = Config_Save.LoadServers();
                    }

                    Properties.Settings.Default.Server = combobxServer.Text;
                    // also save the password
                    if (checkBox1.CheckState.ToString() == "Checked")
                        Properties.Settings.Default.Pass = txtbxPass.Text;

                    Properties.Settings.Default.settingLoginUsername = this.username;
                    Properties.Settings.Default.settingLoginPassword = this.pass;
                    Properties.Settings.Default.settingLoginPort = "5002";
                    Properties.Settings.Default.settingLoginIP = this.IP;
                    Properties.Settings.Default.isLogin = "guest";

                    Properties.Settings.Default.Save();
                    response.Close();
                    request.Abort();
                    this.isPass = true;
                    this.Close();
                }
                else
                {
                    MessageBox.Show("Please Insert Correct Dongle!", "Dongle Error", MessageBoxButtons.OK, MessageBoxIcon.Stop);
                }

Answer 1

WSAStartup是套接字库中的第一个函数，它在开始使用net时执行。你可以进口

 [DllImport("ws2_32.dll", CharSet = CharSet.Auto, SetLastError=true)]
 static extern Int32 WSAGetLastError();

当引发异常时，执行WSAGetLastError并查看来自这里的错误代码。希望它能帮到你。在获得Win32Exception的特定情况下，您可以使用异常中的NativeErrorCode，如@Patrick在注释中所写。