public int TryInvokePropertyGet(string propertyName, out object value)
{
int hr = NativeMethods.S_OK;
IDispatch dispatch = null;
value = null;
try
{
if (IsDispatch)
{
dispatch = TryGetUniqueRCW <IDispatch>();
if (dispatch != null)
{
if (MarshalEx.Succeeded(hr = dispatch.InvokePropertyGet(propertyName, out value)))
{
}
}
}
}
catch
{
}
finally
{
ComPtr.CleanupUniqueRCW(dispatch);
}
return(hr);
}
public static int InvokePropertyGet(this IDispatch dispatch, string name, out object value)
{
int hr = NativeMethods.S_OK;
value = null;
int dispid = 0;
if (MarshalEx.Succeeded(dispatch.GetIdOfName(name, out dispid)))
{
hr = dispatch.InvokePropertyGet(dispid, out value);
}
return(hr);
}
public int TryGetItemCount()
{
IDispatch dispatch = null;
object count = 0;
try
{
dispatch = TryGetUniqueRCW <IDispatch>();
if (MarshalEx.Succeeded(dispatch.InvokePropertyGet("Count", out count)))
{
return(count is int?(int)count : -1);
}
}
catch
{
}
finally
{
CleanupUniqueRCW(dispatch);
}
return(-1);
}