/// <summary>
/// Executes the delegate on the main thread that this DelegateQueue executes on.
/// </summary>
/// <param name="method">
/// A Delegate that contains a method to call, in the context of the thread for the DelegateQueue.
/// </param>
/// <param name="args">
/// An array of type Object that represents the arguments to pass to the given method.
/// </param>
/// <returns>
/// An Object that represents the return value from the delegate being invoked, or a
/// null reference (Nothing in Visual Basic) if the delegate has no return value.
/// </returns>
/// <remarks>
/// <para>Unlike BeginInvoke, this method operates synchronously, that is, it waits until
/// the process completes before returning. Exceptions raised during the call are propagated
/// back to the caller.</para>
/// <para>Use this method when calling a method from a different thread to marshal the call
/// to the proper thread.</para>
/// </remarks>
public object Invoke(Delegate method, params object[] args)
{
if (method == null)
{
throw new ArgumentNullException("method");
}
if (InvokeRequired)
{
DelegateQueueAsyncResult result = new DelegateQueueAsyncResult(this, method, args);
lock (lockObject)
{
if (disposed)
{
throw new ObjectDisposedException(string.Empty, OBJECT_DISPOSED_EXCEPTION);
}
delegateQueue.Enqueue(result);
Monitor.Pulse(lockObject);
}
return EndInvoke(result);
}
// Invoke the method here rather than placing it in the queue.
return method.DynamicInvoke(args);
}
/// <summary>
/// Executes the delegate on the main thread that this DelegateQueue executes on.
/// </summary>
/// <param name="method">
/// A Delegate to a method that takes parameters of the same number and type that
/// are contained in args.
/// </param>
/// <param name="args">
/// An array of type Object to pass as arguments to the given method. This can be
/// a null reference (Nothing in Visual Basic) if no arguments are needed.
/// </param>
/// <returns>
/// An IAsyncResult interface that represents the asynchronous operation started
/// by calling this method.
/// </returns>
/// <remarks>
/// <para>The delegate is called asynchronously, and this method returns immediately.
/// You can call this method from any thread. If you need the return value from a process
/// started with this method, call EndInvoke to get the value.</para>
/// <para>If you need to call the delegate synchronously, use the Invoke method instead.</para>
/// </remarks>
public IAsyncResult BeginInvoke(Delegate method, params object[] args)
{
if (method == null)
{
throw new ArgumentNullException("method", OBJECT_DISPOSED_EXCEPTION);
}
DelegateQueueAsyncResult result = new DelegateQueueAsyncResult(this, method, args);
lock (lockObject)
{
if (disposed)
{
throw new ObjectDisposedException(string.Empty, OBJECT_DISPOSED_EXCEPTION);
}
delegateQueue.Enqueue(result);
Monitor.Pulse(lockObject);
}
return result;
}