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Editorial Team
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Asked: 2026-05-22T14:52:14+00:00

I have a WCF service (using HTTP binding) that our WinForm and WFP apps

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I have a WCF service (using HTTP binding) that our WinForm and WFP apps can use with no problem. We have a Silverlight 4 developer who is saying he’s not able to use the WCF service because it needs to be “reconfigured” for Silverlight use. I don’t know if this is true or not, because I don’t know anything about Silverlight.

So, my question is this. Should a WCF service, that uses HTTP binding, that is successfully being used by our WinForms and WPF applications, also be able to be consumed by Silverlight apps, without modifying or reconfiguring the WCF service?

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1 Answer

  1. Editorial Team

    Silverlight 4 supports the following bindings:

    • BasicHttpBinding

    • PollingDuplexHttpBinding

    • CustomBinding (with a subset of binding elements)

    Silverlight and WCF Feature Comparison:

    There are several ways to use the WCF
    client stack to access a service.

    It is used when invoking services
    through automatically generated
    proxies, as described in How to:
    Access a Service from Silverlight. The
    proxy must be generated in this
    procedure by using the Add Service
    Reference tool in Visual Studio 2010
    for the Silverlight project.

    Caution:

    Proxies generated by using the WCF
    Svcutil.exe tool will not work in
    Silverlight 4. Use the SLsvcutil.exe
    tool instead. For more information
    about using this Silverlight tool, see
    Using SLsvcUtil.exe to Access a
    Service.

    If you already have a Windows
    Communication Foundation (WCF) service
    contract definition, you can use the
    generic ChannelFactory class without
    having to generate a proxy. This might
    be the case, for example, if your
    client is sharing service definition
    code with the project on the server.
    In this case you could, for example,
    define a service contract interface
    IStockQuoteService and then use the
    same IStockQuoteService code in both
    the server and Silverlight projects.
    This would involve using a
    ChannelFactory.
    This advanced technique is
    demonstrated in How to: Call
    Operations Asynchronously Using a
    Channel Factory and in the Silverlight
    4 context with Building and Accessing
    Duplex Services. For more information
    about defining and using service
    contracts, see Designing Service
    Contracts.

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