Wpf oneway binding not updating
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Without reentrancy this would mean a deadlock, as shown in the download.
All you have to do is open the host on the UI thread after establishing the Windows Forms synchronization context.The WCF downloads provide some essentials WCF demos as well as a rich reference for contract design, instance management, operations and calls, faults, transactions, concurrency, queuing, security and the Windows Azure App Fabric service bus.Subscribe to the IDesign Downloads feed You can rework the Svc Util or VS generated proxy so that the same proxy will offer both synchronous and asynchronous calls.If the callback needs to execute on a particular thread (such as updating the UI with Windows Forms), you must marshal the call.The solution is IDesign's Async Client Base proxy base class, that will automatically marshal the call to the client synchronization context (if present). If the service needs to update Windows Forms forms and controls, it must marshal the update to the UI thread(s).If the service were to allow to call back to its client it could result with a deadlock if the client will call to the service as a result of the callback to the client.
To allow callbacks, you need to configure the service for reentrancy – that is, release the lock before the callback, as show in the demo.
The solution demonstrates IDesign Callback Thread Affinity Behavior - a custom endpoint behavior attribute that makes all callback instances (regardless of the worker threads used for the callbacks) execute on the same thread. NET 2.0 synchronization context that always marshals the calls to the same thread.
This is instrumental is advanced cases such as thread local storage and COM interop as well as advanced synchronization needs.
By default, WCF will establish an affinity between the service host and the synchronization context it was created on.
Since by default there is no synchronization context, client calls are services on arbitrary worker threads. NET 2.0 synchronization context that always marshals the calls to the same thread.
By default WCF will not let a service callback within a service operation to its clients.