Learn how to build a custom proxy class in .NET 3.0 for duplex communication, enabling maintainable code and easy updates when service interfaces change.
Instead of using the proxy generation features of Visual Studio you can create a custom proxy in .NET 3.0 to handle all of your needs in a more maintainable manor and with less code. This method works best when you have access to the interfaces that created the service.
Here is an example:
1Namespace TeamFoundation.Proxies 2 3 Public Class TeamServersClient 4 Inherits System.ServiceModel.DuplexClientBase(Of Services.Contracts.ITeamServers) 5 Implements RDdotNet.Proxies.IClientProxy 6 Implements Services.Contracts.ITeamServers 7 8 Public Sub New(ByVal callbackInstance As System.ServiceModel.InstanceContext, ByVal binding As System.ServiceModel.Channels.Binding, ByVal remoteAddress As System.ServiceModel.EndpointAddress) 9 MyBase.New(callbackInstance, binding, remoteAddress) 10 End Sub 11 12 Public Sub AddServer(ByVal TeamServerName As String, ByVal TeamServerUri As String) Implements Services.Contracts.ITeamServers.AddServer 13 MyBase.Channel.AddServer(TeamServerName, TeamServerUri) 14 End Sub 15 16 Public Function GetServers() As String() Implements Services.Contracts.ITeamServers.GetServers 17 Return MyBase.Channel.GetServers 18 End Function 19 20 Public Sub RemoveServer(ByVal TeamServerName As String) Implements Services.Contracts.ITeamServers.RemoveServer 21 MyBase.Channel.RemoveServer(TeamServerName) 22 End Sub 23 24 Public Function ServceUrl() As System.Uri Implements Services.Contracts.ITeamServers.ServceUrl 25 Return MyBase.Channel.ServceUrl() 26 End Function 27 28 End Class 29 30End Namespace
Because your classes implements the service’s interface when that interface changes you will be notified in Visual Studio that this has happened. This is a boon during development as changes can happen often.
This particular class is a duplex proxy, so communication can go both ways. You can download the source code for this from here .
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