/// <summary>
/// Opens an UCOMIStream and returns the associated file object
/// </summary>
/// <param name="parentStorage">storage used to open the stream</param>
/// <param name="fileName">filename of the stream</param>
/// <returns>A <see cref="FileObject">FileObject</see> instance if the file was found, otherwise null.</returns>
public FileObject OpenUCOMStream(Interop.IStorage parentStorage, string fileName)
{
if(parentStorage == null)
parentStorage = storage;
FileObject retObject = null;
STATSTG sTATSTG;
sTATSTG.pwcsName = fileName;
sTATSTG.type = 2;
try
{
retObject = new FileObject();
UCOMIStream uCOMIStream = parentStorage.OpenStream(sTATSTG.pwcsName, IntPtr.Zero, 16, 0);
if(uCOMIStream != null)
{
retObject.FileType = sTATSTG.type;
retObject.FilePath = "";
retObject.FileName = sTATSTG.pwcsName.ToString();
retObject.FileStream = uCOMIStream;
}
else
{
retObject = null;
}
}
catch(Exception ex)
{
retObject = null;
Debug.WriteLine("ITStorageWrapper.OpenUCOMStream() - Failed for file '" + fileName + "'");
Debug.Indent();
Debug.WriteLine("Exception: " + ex.Message);
Debug.Unindent();
}
return retObject;
}
/// <summary>
/// Enumerates an Interop.IStorage object and creates the internal file object collection
/// </summary>
/// <param name="stgEnum">Interop.IStorage to enumerate</param>
/// <param name="BasePath">Sets the base url for the storage files</param>
protected void EnumIStorageObject(Interop.IStorage stgEnum, string BasePath)
{
Interop.IEnumSTATSTG iEnumSTATSTG;
STATSTG sTATSTG;
int i;
stgEnum.EnumElements(0, IntPtr.Zero, 0, out iEnumSTATSTG);
iEnumSTATSTG.Reset();
while (iEnumSTATSTG.Next(1, out sTATSTG, out i) == (int)Interop.S_OK)
{
if(i==0)
break;
FileObject newFileObj = new FileObject();
newFileObj.FileType = sTATSTG.type;
switch (sTATSTG.type)
{
case 1:
Interop.IStorage iStorage = stgEnum.OpenStorage(sTATSTG.pwcsName, IntPtr.Zero, 16, IntPtr.Zero, 0);
if (iStorage != null)
{
string str = String.Concat(BasePath, sTATSTG.pwcsName.ToString());
newFileObj.FileStorage = iStorage;
newFileObj.FilePath = BasePath;
newFileObj.FileName = sTATSTG.pwcsName.ToString();
foCollection.Add(newFileObj);
EnumIStorageObject(iStorage, str);
}
break;
case 2:
UCOMIStream uCOMIStream = stgEnum.OpenStream(sTATSTG.pwcsName, IntPtr.Zero, 16, 0);
newFileObj.FilePath = BasePath;
newFileObj.FileName = sTATSTG.pwcsName.ToString();
newFileObj.FileStream = uCOMIStream;
foCollection.Add(newFileObj);
break;
case 4:
Debug.WriteLine("Ignoring IProperty type ...");
break;
case 3:
Debug.WriteLine("Ignoring ILockBytes type ...");
break;
default:
Debug.WriteLine("Unknown object type ...");
break;
}
}
}