public void GetData(ref FORMATETC format, out STGMEDIUM medium)
{
ComDebug.ReportInfo("{0}.IDataObject.GetData({1})", GetType().Name, DataObjectHelper.FormatEtcToString(format));
try
{
// Locate the data
foreach (var rendering in Renderings)
{
if ((rendering.format.tymed & format.tymed) > 0 &&
rendering.format.dwAspect == format.dwAspect &&
rendering.format.cfFormat == format.cfFormat &&
rendering.renderer != null)
{
// Found it. Return a copy of the data.
medium = new STGMEDIUM
{
tymed = rendering.format.tymed & format.tymed
};
medium.unionmember = rendering.renderer(medium.tymed);
if (medium.tymed == TYMED.TYMED_ISTORAGE || medium.tymed == TYMED.TYMED_ISTREAM)
{
medium.pUnkForRelease = Marshal.GetObjectForIUnknown(medium.unionmember);
}
else
{
medium.pUnkForRelease = null;
}
return;
}
}
}
catch (Exception e)
{
ComDebug.ReportError("{0}.IDataObject.GetData threw an exception {1}", GetType().Name, e);
throw;
}
ComDebug.ReportInfo("{0}.IDataObject.GetData, no data delivered!", GetType().Name);
medium = new STGMEDIUM();
// Marshal.ThrowExceptionForHR(ComReturnValue.DV_E_FORMATETC);
}
public int GetCanonicalFormatEtc(ref FORMATETC formatIn, out FORMATETC formatOut)
{
ComDebug.ReportInfo("{0}.IDataObject.GetCanonicalFormatEtc {1}", GetType().Name, DataObjectHelper.FormatEtcToString(formatIn));
formatOut = default(FORMATETC);
return(ComReturnValue.DATA_S_SAMEFORMATETC);
}
public int DAdvise(ref FORMATETC pFormatetc, ADVF advf, IAdviseSink adviseSink, out int connection)
{
if (null == DataAdviseHolder)
{
ComDebug.ReportInfo("{0}.IDataObject.DAdvise -> not implemented!", GetType().Name);
connection = 0;
return(ComReturnValue.E_NOTIMPL);
}
else
{
ComDebug.ReportInfo("{0}.IDataObject.DAdvise {1}, {2}", GetType().Name, DataObjectHelper.FormatEtcToString(pFormatetc), advf);
try
{
if (pFormatetc.cfFormat != 0) // if a special format is required
{
int res = QueryGetData(ref pFormatetc); // ask the render helper for availability of that format
if (res != ComReturnValue.S_OK) // if the required format is not available
{
connection = 0; // return an invalid connection cookie
return(res); // and the error
}
}
FORMATETC etc = pFormatetc;
DataAdviseHolder.Advise((IDataObject)this, ref etc, advf, adviseSink, out var conn);
connection = conn;
return(ComReturnValue.NOERROR);
}
catch (Exception e)
{
ComDebug.ReportError("{0}.IDataObject.DAdvise exception: {1}", GetType().Name, e);
throw;
}
}
}
