/// <summary>
/// Advises the specified connection point container.
/// </summary>
/// <param name="connectionPointContainer">The connection point container.</param>
/// <exception cref="ArgumentException">An feature progress connection point could not be found.</exception>
public void Advise(IConnectionPointContainer connectionPointContainer)
{
IEnumConnectionPoints enumConnectionPoints;
connectionPointContainer.EnumConnectionPoints(out enumConnectionPoints);
enumConnectionPoints.Reset();
IConnectionPoint connectionPoint;
var guid = typeof(IFeatureProgress).GUID;
uint pcFetched;
enumConnectionPoints.RemoteNext(1, out connectionPoint, out pcFetched);
while (connectionPoint != null)
{
Guid connectionGuid;
connectionPoint.GetConnectionInterface(out connectionGuid);
if (connectionGuid == guid)
{
break;
}
enumConnectionPoints.RemoteNext(1, out connectionPoint, out pcFetched);
}
if (connectionPoint == null)
{
throw new ArgumentException("An feature progress connection point could not be found.");
}
uint connectionPointCookie;
connectionPoint.Advise(this, out connectionPointCookie);
}
/// <summary>
/// Creates a connection point to of the given interface type,
/// which will call on a managed code sink that implements that interface.
/// </summary>
/// <param name='source'>
/// The object that exposes the events. This object must implement IConnectionPointContainer or an InvalidCastException will be thrown.
/// </param>
/// <param name='sink'>
/// The object to sink the events. This object must implement the interface eventInterface, or an InvalidCastException is thrown.
/// </param>
/// <param name='iid'>
/// The GUID of the event interface to sink. The sink object must support this interface and the source object must expose it through it's ConnectionPointContainer.
/// </param>
/// <param name='throwException'>
/// If true, exceptions described will be thrown, otherwise object will silently fail to connect.
/// </param>
public ConnectionPointCookie(object source, object sink, Guid iid, bool throwException)
{
Exception ex = null;
if (source is IConnectionPointContainer)
{
IConnectionPointContainer cpc = (IConnectionPointContainer)source;
IEnumConnectionPoints checkPoints;
cpc.EnumConnectionPoints(out checkPoints);
try
{
Guid tmp = iid;
cpc.FindConnectionPoint(ref tmp, out connectionPoint);
}
catch (Exception)
{
connectionPoint = null;
}
if (connectionPoint == null)
{
ex = new ArgumentException("The source object does not expose the " + iid + " event interface");
}
// else if (!Type.GetTypeFromCLSID(iid).IsInstanceOfType(sink) && !(iid.Equals(typeof(Interop.IPropertyNotifySink).GUID)))
// {
// ex = new InvalidCastException("The sink object does not implement the eventInterface");
// }
else
{
try
{
connectionPoint.Advise(sink, out cookie);
}
catch (Exception)
{
cookie = 0;
connectionPoint = null;
ex = new Exception("IConnectionPoint::Advise failed for event interface '" + iid + "'");
}
}
}
else
{
ex = new InvalidCastException("The source object does not expost IConnectionPointContainer");
}
if (throwException && (connectionPoint == null || cookie == 0))
{
if (ex == null)
{
throw new ArgumentException("Could not create connection point for event interface '" + iid + "'");
}
else
{
throw ex;
}
}
}
/// <summary>
/// try to find connection point by EnumConnectionPoints
/// </summary>
private static string EnumConnectionPoint(ICOMObject comInstance, IConnectionPointContainer connectionPointContainer, ref IConnectionPoint point, params string[] sinkIds)
{
IConnectionPoint[] points = new IConnectionPoint[1];
IEnumConnectionPoints enumPoints = null;
try
{
connectionPointContainer.EnumConnectionPoints(out enumPoints);
while (enumPoints.Next(1, points, IntPtr.Zero) == 0) // S_OK = 0 , S_FALSE = 1
{
if (null == points[0])
{
break;
}
Guid interfaceGuid;
points[0].GetConnectionInterface(out interfaceGuid);
for (int i = sinkIds.Length; i > 0; i--)
{
string id = interfaceGuid.ToString().Replace("{", "").Replace("}", "");
if (true == sinkIds[i - 1].Equals(id, StringComparison.InvariantCultureIgnoreCase))
{
Marshal.ReleaseComObject(enumPoints);
enumPoints = null;
point = points[0];
return(id);
}
}
}
return(null);
}
catch (Exception throwedException)
{
comInstance.Console.WriteException(throwedException);
return(null);
}
finally
{
if (null != enumPoints)
{
Marshal.ReleaseComObject(enumPoints);
}
}
}
/// <summary>
/// try to find connection point by EnumConnectionPoints
/// </summary>
private static string EnumConnectionPoint(COMObject comInstance, IConnectionPointContainer connectionPointContainer, ref IConnectionPoint point, params string[] sinkIds)
{
IConnectionPoint[] points = new IConnectionPoint[1];
IEnumConnectionPoints enumPoints = null;
try
{
connectionPointContainer.EnumConnectionPoints(out enumPoints);
while (enumPoints.Next(1, points, IntPtr.Zero) == 0) // S_OK = 0 , S_FALSE = 1
{
if (null == points[0])
break;
Guid interfaceGuid;
points[0].GetConnectionInterface(out interfaceGuid);
for (int i = sinkIds.Length; i > 0; i--)
{
string id = interfaceGuid.ToString().Replace("{", "").Replace("}", "");
if (true == sinkIds[i - 1].Equals(id, StringComparison.InvariantCultureIgnoreCase))
{
Marshal.ReleaseComObject(enumPoints);
enumPoints = null;
point = points[0];
return id;
}
}
}
return null;
}
catch (Exception throwedException)
{
comInstance.Console.WriteException(throwedException);
return null;
}
finally
{
if (null != enumPoints)
Marshal.ReleaseComObject(enumPoints);
}
}
