C# 如果WCF中指定的IP地址错误（尽管IP地址正确），则TCP错误

我有一个承载WCF服务的应用程序。 我正在通过

BackgroundWorker

private bool isConnected;
private BackgroundWorker asyncWorker = new BackgroundWorker();

    InitializeComponent();        
    asyncWorker.WorkerReportsProgress = true;
    asyncWorker.WorkerSupportsCancellation = true;
    asyncWorker.ProgressChanged += new ProgressChangedEventHandler
                    (bwAsync_ProgressChanged);
    asyncWorker.RunWorkerCompleted += new RunWorkerCompletedEventHandler
                    (bwAsync_RunWorkerCompleted);
    asyncWorker.DoWork += new DoWorkEventHandler(bwAsync_DoWork);
    btnConnect.BackColor = Color.ForestGreen;

这是我的连接按钮单击事件：

    private void btnConnect_Click(object sender, EventArgs e)
    {            
        btnConnect.Enabled = false;
        Interface.interfaceNumber = interfaceNumber;
        asyncWorker.RunWorkerAsync();
    }

和嫁妆：

private void bwAsync_DoWork(object sender, DoWorkEventArgs e)
{
    BackgroundWorker bwAsync = sender as BackgroundWorker;
    try
    {
        if (!isConnected)
        {
            // Returns a list of ipaddress configuration
            IPHostEntry ips = Dns.GetHostEntry(Dns.GetHostName());

            // Get machine ipaddress
            IPAddress _ipAddress = IPAddress.Parse(tbServerIp.Text);

            // Create the url that is needed to specify where the service should be started
            urlService = "net.tcp://" + _ipAddress.ToString() + ":8000/MyService";

            // Instruct the ServiceHost that the type that is used is a ServiceLibrary.service1
            //host = new ServiceHost(typeof(ServiceLibrary.service1));
            ServiceLibrary.service1 serviceInstance = new ServiceLibrary.service1();
            serviceInstance.CapturingEvent += yourServiceInstance_StartCapturingEvent;
            serviceInstance.OnProcessExitedEvent += serviceInstance_OnProcessExitedEvent;
            host = new ServiceHost(serviceInstance);
            host.Opening += new EventHandler(host_Opening);
            host.Opened += new EventHandler(host_Opened);
            host.Closing += new EventHandler(host_Closing);
            host.Closed += new EventHandler(host_Closed);

            // The binding is where we can choose what transport layer we want to use. HTTP, TCP ect.
            NetTcpBinding tcpBinding = new NetTcpBinding();
            tcpBinding.TransactionFlow = false;
            tcpBinding.Security.Transport.ProtectionLevel = System.Net.Security.ProtectionLevel.EncryptAndSign;
            tcpBinding.Security.Transport.ClientCredentialType = TcpClientCredentialType.Windows;
            tcpBinding.Security.Mode = SecurityMode.None; // <- Very crucial

            // Add a endpoint
            host.AddServiceEndpoint(typeof(ServiceLibrary.IService1), tcpBinding, urlService);

            // A channel to describe the service. Used with the proxy scvutil.exe tool
            ServiceMetadataBehavior metadataBehavior;
            metadataBehavior = host.Description.Behaviors.Find<ServiceMetadataBehavior>();
            if (metadataBehavior == null)
            {
                // Create the proxy object that is generated via the svcutil.exe tool
                metadataBehavior = new ServiceMetadataBehavior();
                metadataBehavior.HttpGetUrl = new Uri("http://" + _ipAddress.ToString() + ":8001/MyService");
                metadataBehavior.HttpGetEnabled = true;
                metadataBehavior.ToString();
                host.Description.Behaviors.Add(metadataBehavior);
                urlMeta = metadataBehavior.HttpGetUrl.ToString();
            }

            host.Open();
            isConnected = true;
        }
        else
        {
            if (asyncWorker.IsBusy)
            {
                //bnAsync.Enabled = false;
                this.Invoke((MethodInvoker)delegate { lblStatus.Text = "Cancelling..."; });

                // Notify the worker thread that a cancel has been requested.
                // The cancel will not actually happen until the thread in the
                // DoWork checks the bwAsync.CancellationPending flag, for this
                // reason we set the label to "Cancelling...", because we haven't
                // actually cancelled yet.
                asyncWorker.CancelAsync();
            }

            host.Close();
            isConnected = false;
        }
    }
    catch (Exception ex)
    {
        isConnected = false;
        MessageBox.Show(ex.Message);
        return;
    }
}

private void worker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
    // Lock\Release buttons
}

private void bwancy\u DoWork（对象发送方，DoWorkEventArgs e）
{
BackgroundWorker BWANC=发送方作为BackgroundWorker；
尝试
{
如果（！未连接）
{
//返回IP地址配置的列表
IPHostEntry ips=Dns.GetHostEntry（Dns.GetHostName（））；
//获取计算机IP地址
IPAddress _IPAddress=IPAddress.Parse（tbServerIp.Text）；
//创建指定服务启动位置所需的url
urlService=“net.tcp://”+_ipAddress.ToString（）+“：8000/MyService”；
//指示ServiceHost使用的类型是ServiceLibrary.service1
//主机=新的ServiceHost（typeof（ServiceLibrary.service1））；
ServiceLibrary.service1 serviceInstance=新的ServiceLibrary.service1（）；
serviceInstance.CapturingEvent+=您的serviceInstance\u StartCapturingEvent；
serviceInstance.OnProcessExitedEvent+=serviceInstance\u OnProcessExitedEvent；
主机=新的ServiceHost（serviceInstance）；
host.Opening+=新的事件处理程序（host\u Opening）；
host.Opened+=新的事件处理程序（host\u已打开）；
host.Closing+=新的事件处理程序（host\u Closing）；
host.Closed+=新的事件处理程序（host\u Closed）；
//在绑定中，我们可以选择要使用的传输层。HTTP、TCP等。
NetTcpBinding=新的NetTcpBinding（）；
tcpBinding.TransactionFlow=false；
tcpBinding.Security.Transport.ProtectionLevel=System.Net.Security.ProtectionLevel.EncryptAndSign；
tcpBinding.Security.Transport.ClientCredentialType=TcpClientCredentialType.Windows；
tcpBinding.Security.Mode=SecurityMode.None；//首先不要使用IP地址，除非你只是做
localhost
dev，使用DNS名称或主机文件名条目总是一个坏主意。其次，我假设你的
host
变量是一个类成员变量（上面没有包含的代码）。打开主机后，它的绑定将在服务器内存中保持活动状态，直到重新启动应用程序（这是标准做法）

另一个问题是，在代码< >代码> BasyCycDoWork < /Code >块中，在单击表单按钮后关闭主机，但不使用更新的表单数据重新绑定/重新打开主机。请考虑以下事项来修复此问题。
将执行实际主机绑定的代码从
bwancy\u DoWork
移到自己的方法中
在
bwancy\u DoWork
的最后调用此方法以确保新绑定已打开
代码：

private void bwAsync_DoWork(object sender, DoWorkEventArgs e)
{
    BackgroundWorker bwAsync = sender as BackgroundWorker;
    if (asyncWorker.IsBusy)
    {
        this.Invoke((MethodInvoker)delegate { lblStatus.Text = "Cancelling..."; });

        asyncWorker.CancelAsync();
    }
    else
    {
        if(isConnected)
        {
            host.Close();
            isConnected = false;
        }   
        BindHost();         
    }
}


private void BindHost() 
{
    ...
    isConnected = true;
}

您能告诉我如何使用DNS名称或主机文件名条目吗？顺便说一句，在插入错误的ip地址并重新插入正确的ip地址后，我仍然收到相同的错误