private static void WriteProperty(OLEStructuredStorage.IPropertyStorage propertyStorage, int propid, string value)
{
if (!string.IsNullOrEmpty(value))
{
OLEStructuredStorage.PropVariant propertyValues = default(OLEStructuredStorage.PropVariant);
OLEStructuredStorage.PropSpec propertySpecification = default(OLEStructuredStorage.PropSpec);
propertySpecification.ulKind = 1;
propertySpecification.strPtr = new IntPtr(propid);
try
{
propertyValues.FromString(value);
propertyStorage.WriteMultiple(1u, ref propertySpecification, ref propertyValues, 2);
propertyStorage.Commit(0);
}
finally
{
propertyValues.Dispose();
}
}
}
internal static bool CreateMultiStreamFile(Stream[] sources, string[] streamNames, string clsId, string author, string title, string comments, Stream output, bool forceInMemory)
{
OLEStructuredStorage.UCOMIStorage storage = null;
OLEStructuredStorage.UCOMILockBytes uCOMILockBytes = null;
IStream stream = null;
string text = null;
Guid clsid = new Guid(clsId);
long num = 0L;
long num2 = 0L;
for (int i = 0; i < sources.Length; i++)
{
num2 = Math.Max(sources[i].Length, num2);
num += sources[i].Length;
}
int num3 = Math.Min(1048576, (int)num2 + 512);
try
{
int grfMode = 134221842;
int grfMode2 = 18;
text = Path.GetTempPath() + Guid.NewGuid().ToString("N", CultureInfo.InvariantCulture) + ".doc.tmp";
if (OLEStructuredStorage.StgCreateDocfile(text, grfMode, 0, out storage) != 0)
{
return(false);
}
byte[] array = new byte[num3];
for (int j = 0; j < streamNames.Length; j++)
{
sources[j].Seek(0L, SeekOrigin.Begin);
storage.CreateStream(streamNames[j], grfMode2, 0, 0, out stream);
if (stream != null)
{
IntPtr pcbWritten = default(IntPtr);
int num4 = 0;
while ((num4 = sources[j].Read(array, 0, num3)) > 0)
{
stream.Write(array, num4, pcbWritten);
}
sources[j] = null;
}
Marshal.ReleaseComObject(stream);
stream = null;
}
OLEStructuredStorage.IPropertySetStorage propSetStg = null;
OLEStructuredStorage.IPropertyStorage propertyStorage = null;
OLEStructuredStorage.StgCreatePropSetStg(storage, 0, out propSetStg);
Guid rfmtid = new Guid("{F29F85E0-4FF9-1068-AB91-08002B27B3D9}");
propSetStg.Create(ref rfmtid, IntPtr.Zero, 0, grfMode2, out propertyStorage);
WriteProperty(propertyStorage, 2, title);
WriteProperty(propertyStorage, 4, author);
WriteProperty(propertyStorage, 6, comments);
Marshal.ReleaseComObject(propertyStorage);
Marshal.ReleaseComObject(propSetStg);
storage.SetClass(ref clsid);
storage.Commit(0);
Marshal.ReleaseComObject(storage);
storage = null;
using (Stream stream2 = File.OpenRead(text))
{
int num5 = 0;
while ((num5 = stream2.Read(array, 0, array.Length)) > 0)
{
output.Write(array, 0, num5);
}
}
array = null;
return(true);
}
catch (Exception ex)
{
throw ex;
}
finally
{
if (!string.IsNullOrEmpty(text) && File.Exists(text))
{
File.Delete(text);
}
if (stream != null)
{
Marshal.ReleaseComObject(stream);
stream = null;
}
if (storage != null)
{
Marshal.ReleaseComObject(storage);
storage = null;
}
if (uCOMILockBytes != null)
{
Marshal.ReleaseComObject(uCOMILockBytes);
uCOMILockBytes = null;
}
}
}