private static string GetPropertyName(Guid fmtid, IPropertyStorage propertyStorage, STATPROPSTG stg)
{
if (!string.IsNullOrEmpty(stg.lpwstrName))
{
return(stg.lpwstrName);
}
var propids = new uint[1];
propids[0] = stg.propid;
var names = new string[1];
names[0] = null;
var hr = propertyStorage.ReadPropertyNames(1, propids, names);
if (hr == 0)
{
return(names[0]);
}
foreach (var kp in CompoundProperty.KnownProperties)
{
if (kp.FormatId == fmtid && kp.Id == stg.propid)
{
return(kp.Name);
}
}
return(null);
}
internal static int GetPropertyName(this IPropertyStorage propertyStorage, uint propid, out string name)
{
HRESULT hr = HRESULT.E_FAIL;
name = String.Empty;
uint[] rgpropid = { propid };
string[] rglpwstrName = { String.Empty };
if (NativeMethods.Succeeded(hr = propertyStorage.ReadPropertyNames(1, rgpropid, rglpwstrName)))
{
name = rglpwstrName[0];
}
if (String.IsNullOrWhiteSpace(name))
{
Guid fmtid = propertyStorage.GetFormatId();
if (fmtid.Equals(FormatId.SummaryInformation))
{
name = propertyStorage.GetPropertyName((PIDSI)propid);
hr = HRESULT.S_OK;
}
else if (fmtid.Equals(FormatId.DocSummaryInformation))
{
name = propertyStorage.GetPropertyName((PIDDSI)propid);
hr = HRESULT.S_OK;
}
}
return(hr);
}
