mirror of https://github.com/dahall/Vanara.git
Enhanced ComConnectionPoint
parent
73aa0c5859
commit
4694988177
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@ -12,7 +12,7 @@ namespace Vanara.InteropServices
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/// </summary>
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public class ComConnectionPoint : IDisposable
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{
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private List<Tuple<IConnectionPoint, int>> connectionPoints = new List<Tuple<IConnectionPoint, int>>();
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private readonly List<(IConnectionPoint, int)> connectionPoints = new List<(IConnectionPoint, int)>();
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/// <summary>Initializes a new instance of the <see cref="ComConnectionPoint"/> class.</summary>
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/// <param name="source">The COM object from which to query the <see cref="IConnectionPointContainer"/> reference.</param>
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@ -20,19 +20,20 @@ namespace Vanara.InteropServices
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/// <param name="interfaces">The interfaces supported by <paramref name="source"/> that support events.</param>
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public ComConnectionPoint(object source, object sink, params Type[] interfaces)
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{
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if (source == null) throw new ArgumentNullException(nameof(source));
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if (sink == null) sink = this;
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if (interfaces == null) interfaces = GetComInterfaces(sink);
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if (source is null) throw new ArgumentNullException(nameof(source));
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if (source is not IConnectionPointContainer connectionPointContainer)
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throw new ArgumentException("The source object must be COM object that supports the IConnectionPointContainer interface.", nameof(source));
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Sink = sink ?? this;
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if (interfaces == null) interfaces = GetComInterfaces(Sink);
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if (interfaces.Length < 1) throw new ArgumentOutOfRangeException(nameof(interfaces));
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// Start the event sink
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if (!(source is IConnectionPointContainer connectionPointContainer)) throw new InvalidOperationException("The source object must be COM object that supports the IConnectionPointContainer interface.");
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foreach (var i in interfaces)
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{
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var comappEventsInterfaceId = i.GUID;
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connectionPointContainer.FindConnectionPoint(ref comappEventsInterfaceId, out var connectionPoint);
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connectionPoint.Advise(sink, out var cookie);
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connectionPoints.Add(new Tuple<IConnectionPoint, int>(connectionPoint, cookie));
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connectionPoint.Advise(Sink, out var cookie);
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connectionPoints.Add((connectionPoint, cookie));
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}
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}
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@ -45,16 +46,14 @@ namespace Vanara.InteropServices
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/// </param>
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public ComConnectionPoint(object source, object sink) : this(source, sink, null) { }
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private static Type[] GetComInterfaces(object sink)
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{
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var ii = sink?.GetType().GetInterfaces().ToList() ?? new List<Type>();
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for (int i = ii.Count - 1; i >= 0; i--)
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{
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if (!ii[i].GetCustomAttributes(true).Any(a => a.GetType() == typeof(ComImportAttribute) || a.GetType() == typeof(InterfaceTypeAttribute)))
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ii.RemoveAt(i);
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}
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return ii.ToArray();
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}
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/// <summary>Gets the sink.</summary>
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/// <value>The sink.</value>
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public object Sink { get; private set; }
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private static Type[] GetComInterfaces(object sink) =>
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sink?.GetType().GetInterfaces().
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Where(i => i.GetCustomAttributes(true).Any(a => a.GetType() == typeof(ComImportAttribute) || a.GetType() == typeof(InterfaceTypeAttribute))).
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ToArray();
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/// <summary>Releases unmanaged and - optionally - managed resources.</summary>
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public void Dispose()
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@ -65,6 +64,7 @@ namespace Vanara.InteropServices
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pair.Item1.Unadvise(pair.Item2);
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}
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connectionPoints.Clear();
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Sink = null;
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}
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}
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}
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