我有托管WCF
服务的应用程序。我通过打开连接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;
这是我的连接按钮点击事件:
private void btnConnect_Click(object sender, EventArgs e)
{
btnConnect.Enabled = false;
Interface.interfaceNumber = interfaceNumber;
asyncWorker.RunWorkerAsync();
}
和做工作:
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
}
我的应用程序连接成功并且一切正常,但如果我指定了错误的 IP 地址,我会收到 TCP 错误,requested Ip Address is not valid
这没关系,但如果我将这个错误的 IP 地址修复为正确的 IP 地址,我仍然会收到相同的错误,除非我的应用程序重新启动. 也许我的线程仍在运行,这就是我无法连接的原因?