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Code Issues Releases Wiki Activity

Enhanced ComConnectionPoint

pull/221/head
dahall 2021-03-28 20:12:48 -06:00
parent 73aa0c5859
commit 4694988177
1 changed files with 17 additions and 17 deletions
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34
Core/InteropServices/ComConnectionPoint.cs
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@ -12,7 +12,7 @@ namespace Vanara.InteropServices
/// </summary>
public class ComConnectionPoint : IDisposable
{
private List<Tuple<IConnectionPoint, int>> connectionPoints = new List<Tuple<IConnectionPoint, int>>();
private readonly List<(IConnectionPoint, int)> connectionPoints = new List<(IConnectionPoint, int)>();
/// <summary>Initializes a new instance of the <see cref="ComConnectionPoint"/> class.</summary>
/// <param name="source">The COM object from which to query the <see cref="IConnectionPointContainer"/> reference.</param>
@ -20,19 +20,20 @@ namespace Vanara.InteropServices
/// <param name="interfaces">The interfaces supported by <paramref name="source"/> that support events.</param>
public ComConnectionPoint(object source, object sink, params Type[] interfaces)
{
if (source == null) throw new ArgumentNullException(nameof(source));
if (sink == null) sink = this;
if (interfaces == null) interfaces = GetComInterfaces(sink);
if (source is null) throw new ArgumentNullException(nameof(source));
if (source is not IConnectionPointContainer connectionPointContainer)
throw new ArgumentException("The source object must be COM object that supports the IConnectionPointContainer interface.", nameof(source));
Sink = sink ?? this;
if (interfaces == null) interfaces = GetComInterfaces(Sink);
if (interfaces.Length < 1) throw new ArgumentOutOfRangeException(nameof(interfaces));
// Start the event sink
if (!(source is IConnectionPointContainer connectionPointContainer)) throw new InvalidOperationException("The source object must be COM object that supports the IConnectionPointContainer interface.");
foreach (var i in interfaces)
{
var comappEventsInterfaceId = i.GUID;
connectionPointContainer.FindConnectionPoint(ref comappEventsInterfaceId, out var connectionPoint);
connectionPoint.Advise(sink, out var cookie);
connectionPoints.Add(new Tuple<IConnectionPoint, int>(connectionPoint, cookie));
connectionPoint.Advise(Sink, out var cookie);
connectionPoints.Add((connectionPoint, cookie));
}
}
@ -45,16 +46,14 @@ namespace Vanara.InteropServices
/// </param>
public ComConnectionPoint(object source, object sink) : this(source, sink, null) { }
private static Type[] GetComInterfaces(object sink)
{
var ii = sink?.GetType().GetInterfaces().ToList() ?? new List<Type>();
for (int i = ii.Count - 1; i >= 0; i--)
{
if (!ii[i].GetCustomAttributes(true).Any(a => a.GetType() == typeof(ComImportAttribute) || a.GetType() == typeof(InterfaceTypeAttribute)))
ii.RemoveAt(i);
}
return ii.ToArray();
}
/// <summary>Gets the sink.</summary>
/// <value>The sink.</value>
public object Sink { get; private set; }
private static Type[] GetComInterfaces(object sink) =>
sink?.GetType().GetInterfaces().
Where(i => i.GetCustomAttributes(true).Any(a => a.GetType() == typeof(ComImportAttribute) || a.GetType() == typeof(InterfaceTypeAttribute))).
ToArray();
/// <summary>Releases unmanaged and - optionally - managed resources.</summary>
public void Dispose()
@ -65,6 +64,7 @@ namespace Vanara.InteropServices
pair.Item1.Unadvise(pair.Item2);
}
connectionPoints.Clear();
Sink = null;
}
}
}