private Image ReadThumbnail()
{
if (!(this.HasSummary && this.HasThumbnail))
{
return null;
}
if ((this.Thumbnail != null) && this.Thumbnail.IsAlive)
{
return (Image) this.Thumbnail.Target;
}
Image target = null;
try
{
using (CompoundFile file = new CompoundFile(this._FileInfo.OpenRead()))
{
CompoundStreamEntry entry = file.Root["\x0005SummaryInformation"] as CompoundStreamEntry;
if (entry != null)
{
using (Stream stream = entry.OpenRead())
{
PropertyStorage storage = new PropertyStorage(stream);
this.Summary = storage.GetSection(SummaryInformationSet.FMTID_SummaryInformation) as SummaryInformationSet;
if (this.Summary != null)
{
foreach (int num in OlePropertyProvider.PropertyMap.Values)
{
this.Summary.CacheProperty(num);
}
target = this.Summary.Thumbnail;
}
}
}
}
}
catch (Exception exception)
{
PropertyProviderManager.ProviderTrace.TraceException(TraceEventType.Error, exception);
}
if (this.Summary == null)
{
this.HasSummary = false;
}
if (target == null)
{
this.HasThumbnail = false;
}
else
{
this.Thumbnail = new WeakReference(target);
}
if (!(this.HasSummary && this.HasThumbnail))
{
base.ResetAvailableSet();
}
return target;
}
private void ReadSummary()
{
if (this.HasSummary && (!this.HasSummary || (this.Summary == null)))
{
try
{
using (CompoundFile file = new CompoundFile(this._FileInfo.OpenRead()))
{
CompoundStreamEntry entry = file.Root["\x0005SummaryInformation"] as CompoundStreamEntry;
if (entry != null)
{
using (Stream stream = entry.OpenRead())
{
PropertyStorage storage = new PropertyStorage(stream);
this.Summary = storage.GetSection(SummaryInformationSet.FMTID_SummaryInformation) as SummaryInformationSet;
if (this.Summary != null)
{
foreach (int num in OlePropertyProvider.PropertyMap.Values)
{
this.Summary.CacheProperty(num);
}
}
}
}
}
}
catch (Exception exception)
{
PropertyProviderManager.ProviderTrace.TraceException(TraceEventType.Error, exception);
}
if (this.Summary == null)
{
this.HasSummary = false;
base.ResetAvailableSet();
}
}
}