internal static int GetPropertyValue(this IPropertySetStorage propertySetStorage, Guid fmtid, uint propid, out PROPVARIANT propvar)
{
HRESULT hr = (int)HRESULT.E_FAIL;
propvar = default(PROPVARIANT);
PROPSPEC[] propspec = new PROPSPEC[1];
PROPVARIANT[] propvars = { propvar };
IPropertyStorage propertyStorage = null;
uint grfMode = (uint)(STGM.READ | STGM.SHARE_EXCLUSIVE);
try
{
if (NativeMethods.Succeeded(hr = propertySetStorage.Open(ref fmtid, grfMode, out propertyStorage)))
{
hr = propertyStorage.GetProperty(propid, out propvar);
}
}
catch
{
}
finally
{
if (propertyStorage != null)
{
propertyStorage.FinalRelease();
}
}
return(hr);
}
internal static int GetPropertyName(this IPropertySetStorage propertySetStorage, Guid fmtid, uint propid, out string name)
{
HRESULT hr = (int)HRESULT.E_FAIL;
name = String.Empty;
IPropertyStorage propertyStorage = null;
uint grfMode = (uint)(STGM.READ | STGM.SHARE_EXCLUSIVE);
try
{
if (NativeMethods.Succeeded(hr = propertySetStorage.Open(ref fmtid, grfMode, out propertyStorage)))
{
hr = propertyStorage.GetPropertyName(propid, out name);
}
}
catch
{
}
finally
{
if (propertyStorage != null)
{
propertyStorage.FinalRelease();
}
}
return(hr);
}
private void LoadPropertySets()
{
HRESULT hr = (int)HRESULT.E_FAIL;
IEnumSTATPROPSETSTG enumerator = null;
STATPROPSETSTG[] stat = new STATPROPSETSTG[1];
uint fetched = 0;
List <Guid> fmtids = new List <Guid>();
// Build list of FMTID's.
try
{
if (NativeMethods.Succeeded(hr = _propertySetStorage.Enum(out enumerator)))
{
while (NativeMethods.Succeeded(hr = (enumerator.Next(1, stat, out fetched))) && (fetched == 1))
{
fmtids.Add(stat[0].fmtid);
}
// IPropertySetStorage.Enum() does not enumerate FMTID_UserDefinedProperties.
// Note that FMTID_UserDefinedProperties may not exist.
fmtids.Add(FormatId.UserDefinedProperties);
}
foreach (Guid fmtid in fmtids)
{
Guid rfmtid = fmtid;
uint grfMode = (uint)(STGM.READ | STGM.SHARE_EXCLUSIVE);
//uint grfMode = (uint)(STGM.DIRECT | STGM.READ | STGM.SHARE_DENY_WRITE);
IPropertyStorage propertyStorage = null;
try
{
if (NativeMethods.Succeeded(hr = _propertySetStorage.Open(ref rfmtid, grfMode, out propertyStorage)))
{
_propertySets.Add(PropertySet.FromIPropertyStorage(propertyStorage));
}
}
catch
{
#if DEBUG
System.Diagnostics.Debugger.Break();
#endif
}
finally
{
if (propertyStorage != null)
{
propertyStorage.FinalRelease();
}
}
}
}
catch
{
}
finally
{
if (enumerator != null)
{
enumerator.FinalRelease();
}
}
}