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在代码中创建NetTcpBinding时,如何设置ReliableSession.MaxPendingChannels?

nettcpbinding configuration wcf .net

3

Ian Ringrose · 技术社区 · 15 年前

我们得到这个错误:

System.ServiceModel.ServerToobusyException:异常: 创建可靠的会话已被rm拒绝目的地。服务器 'net.tcp://localhost:50000/'也是忙着处理此请求。尝试稍后再来。频道不可能是开的。

据我所知,我需要增加ReliableSession绑定中MaxPendingChannels的值。

但是,我们在如下代码中配置wcf:

serviceHost = new ServiceHost(typeof(MyServiceClass));
ServiceEndpoint endPoint = serviceHost.AddServiceEndpoint(
    typeof(IMyService),
    new NetTcpBinding(SecurityMode.None, true),
    endPointAddress);

那么如何以编程方式设置reliablesession.maxpendingchannels? (我能找到的所有示例都使用配置文件)

在此上搜索MaxPendingChannels web page 一种选择,但似乎过于复杂。

4 回复 | 直到 9 年前

1

6

Ian Ringrose 15 年前

我就是这么做的:

 private Binding CreateBindingWith_MaxPendingChannels_Set(Binding baseBinding)
 {
     BindingElementCollection elements = baseBinding.CreateBindingElements();
     ReliableSessionBindingElement reliableSessionElement = 
                elements.Find<ReliableSessionBindingElement>();
     if (reliableSessionElement != null)
     {
         reliableSessionElement.MaxPendingChannels = 128;

         CustomBinding newBinding = new CustomBinding(elements);

         newBinding.CloseTimeout = baseBinding.CloseTimeout;
         newBinding.OpenTimeout = baseBinding.OpenTimeout;
         newBinding.ReceiveTimeout = baseBinding.ReceiveTimeout;
         newBinding.SendTimeout = baseBinding.SendTimeout;
         newBinding.Name = baseBinding.Name;
         newBinding.Namespace = baseBinding.Namespace;
         return newBinding;
     }
     else
     {
         throw new Exception("the base binding does not " +
                             "have ReliableSessionBindingElement");
     }
 }

…

 Binding customBinding = CreateBindingWith_MaxPendingChannels_Set(
      new NetTcpBinding(SecurityMode.None, true));

 serviceHost = new ServiceHost(typeof(MyService));
 ServiceEndpoint endPoint = serviceHost.AddServiceEndpoint(
                    typeof(IMyService),
                    customBinding,
                    endPointAddress);

2

1

avid 11 年前

我还需要在代码中设置这个属性,在研究之后发现有两种方法可以通过编程来实现。

第一种方法是直接在代码中创建绑定元素,并根据 CustomBinding MSDN

// Create a custom binding that contains two binding elements.
ReliableSessionBindingElement reliableSession = new ReliableSessionBindingElement();
reliableSession.MaxPendingChannels = 100;

TcpTransportBindingElement tcpTransport = new TcpTransportBindingElement();

CustomBinding binding = new CustomBinding(reliableSession, tcpTransport);

我找到的第二种方法是从现有绑定中获取对绑定元素的引用,如下所述 How to: Customize a System-Provided Binding . 这就是最重要的答案。

我试图在nettcpbinding上设置reliablesession属性,但它实际上并没有像我期望的那样修改maxpendingconnections属性。在查看netcpbinding和reliablesession的.NET源代码后,我发现在绑定上设置此属性如下

NetTcpBinding netTcpBinding = new NetTcpBinding(SecurityMode.None, true);

netTcpBinding.ReliableSession = 
    new OptionalReliableSession(
        new ReliableSessionBindingElement()
            {
                MaxPendingChannels = 100
            });

实际上并没有在绑定上设置MaxPendingChannels属性。

我最终直接从binding元素创建了绑定,因为我想精确地控制绑定

3

0

darkArk 11 年前

或者可以使用 ReliableSession 来自的属性 NetTcpBinding 这样地:

// initialize ReliableSessionBindingElement object
var reliableSessionBindingElement = new ReliableSessionBindingElement
{
  MaxPendingChannels = 128
  // set other properties here
}; 

binding.ReliableSession = new ReliableSession(reliableSessionBindingElement)
{
  // set properties here
};

有关详细信息,请参阅: http://msdn.microsoft.com/en-us/library/ms585454(v=vs.110).aspx

4

0

Bart Bourgeois 9 年前

如果使用像nettcpreaybinding这样的中继绑定,则可以使用以下代码:

public static class NetTcpRelayBindingExtension
{
    public static void SetReliableSessionMaxPendingChannels(this NetTcpRelayBinding baseBinding, Int32 MaxPendingChannels)
    {
        var bindingType = baseBinding.GetType();
        var bindingProperty = bindingType.GetField("session", BindingFlags.GetField | BindingFlags.Instance | BindingFlags.NonPublic);
        var reliableSession = (ReliableSessionBindingElement)bindingProperty.GetValue(baseBinding);
        reliableSession.MaxPendingChannels = MaxPendingChannels;
    }
}

用途:

var binding = new NetTcpRelayBinding();
binding.SetReliableSessionMaxPendingChannels(128);