在C＃中，如何引用在app.exe.config中配置的端口号？

Question

In our server, we configure the port in app.config as follows:

<configuration>
   <system.runtime.remoting>
      <application>
         <channels>
            <channel ref="tcp" port="1234" />
         </channels>
      </application>
   </system.runtime.remoting>
</configuration>

We then proceed to configure the server with the following C# code:

RemotingConfiguration.Configure(string.Format("{0}{1}", appFolder, "app.exe.config"), false);

How do I reference the port number after it has been configured short of parsing the file by hand?

Answer 1

Looks like it is possible after all. After calling RemotingConfiguration.Configure(string, bool), I run the following method:

private string GetPortAsString()
          {
             // Parsing
             System.Runtime.Remoting.Channels.IChannel[] channels = System.Runtime.Remoting.Channels.ChannelServices.RegisteredChannels;
             foreach (System.Runtime.Remoting.Channels.IChannel c in channels)
             {
                System.Runtime.Remoting.Channels.Tcp.TcpChannel tcp = c as System.Runtime.Remoting.Channels.Tcp.TcpChannel;
                if (tcp != null)
                {
                   System.Runtime.Remoting.Channels.ChannelDataStore store = tcp.ChannelData as System.Runtime.Remoting.Channels.ChannelDataStore;
                   if (store != null)
                   {
                      foreach (string s in store.ChannelUris)
                      {
                         Uri uri = new Uri(s);
                         return uri.Port.ToString(); // There should only be one, and regardless the port should be the same even if there are others in this list.
                      }
                   }
                }
             }

             return string.Empty;
          }

This gives me the TcpChannel info I need, which allows me to grab the ChannelUri and get the port.

GRAIT SUCCESS!

Answer 2

You can only configure through code or configuration, you can't do both. This means you can't access the configured details via code, (without passing the xml file yourself).

Answer 3

I've just taken a look at the ConfigurationManager to help get the values you need...unfortunately it doesnt look like there is a sectionGroup for system.runtime.remoting: ie, this call fails:

var cfg = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
var sectionGroup = cfg.GetSectionGroup("system.runtime.remoting");

So it doesn't appear to me you can use anything existing in the framework to extract it nicely. I'm unsure why this sectionGroup doesnt exist in-code.