/// <summary>
/// Checks if a child storage exists within the parent.
/// </summary>
/// <param name="storageName">Name of the storage to look for.</param>
/// <returns>A boolean value indicating whether the child storage was found.</returns>
public bool ExistsStorage(string storageName)
{
CheckDisposed();
var cfMock = new CFMock(storageName, StgType.StgStorage);
CFItem directoryEntry;
return(Children.TryFind(cfMock, out directoryEntry) && directoryEntry.DirEntry.StgType == StgType.StgStorage);
}
/// <summary>
/// Checks whether a child stream exists in the parent.
/// </summary>
/// <param name="streamName">Name of the stream to look for</param>
/// <returns>A boolean value indicating whether the child stream exists.</returns>
/// <example>
/// <code>
/// string filename = "report.xls";
///
/// CompoundFile cf = new CompoundFile(filename);
///
/// bool exists = ExistsStream("Workbook");
///
/// if exists
/// {
/// CFStream foundStream = cf.RootStorage.GetStream("Workbook");
///
/// byte[] temp = foundStream.GetData();
/// }
///
/// Assert.IsNotNull(temp);
///
/// cf.Close();
/// </code>
/// </example>
public bool ExistsStream(string streamName)
{
CheckDisposed();
var tmp = new CFMock(streamName, StgType.StgStream);
CFItem outDe;
return(Children.TryFind(tmp, out outDe) && outDe.DirEntry.StgType == StgType.StgStream);
}
/// <summary>
/// Get a named
/// <see cref="T:DocumentServices.Modules.Extractors.OfficeExtractor.OLECompoundFileStorage.CFStream">stream</see>
/// contained in the current storage if existing.
/// </summary>
/// <param name="streamName">Name of the stream to look for</param>
/// <returns>A stream reference if existing</returns>
/// <exception cref="CFItemNotFound">Raised if <see cref="streamName" /> is not found</exception>
public ICFStream GetStream(string streamName)
{
CheckDisposed();
var cfMock = new CFMock(streamName, StgType.StgStream);
CFItem directoryEntry;
if (Children.TryFind(cfMock, out directoryEntry) && directoryEntry.DirEntry.StgType == StgType.StgStream)
{
return(directoryEntry as CFStream);
}
throw new CFItemNotFound("Cannot find item [" + streamName + "] within the current storage");
}
