/// <summary>
/// Creates an TextReader object for the given <paramref name="fileName"/>
/// </summary>
/// <param name="fileName">The file to read</param>
/// <param name="extension">Overrides the file extension of the <paramref name="fileName"/>,
/// the extension is used to determine the <see cref="NativeMethods.IFilter"/> that needs to
/// be used to read the <paramref name="fileName"/></param>
/// <param name="disableEmbeddedContent">When set to <c>true</c> the <see cref="NativeMethods.IFilter"/>
/// doesn't read embedded content, e.g. an attachment inside an E-mail msg file. This parameter is default set to <c>false</c></param>
/// <param name="includeProperties">When set to <c>true</c> the metadata properties of
/// a document are also returned, e.g. the summary properties of a Word document. This parameter
/// is default set to <c>false</c></param>
/// <param name="readIntoMemory">When set to <c>true</c> the <paramref name="fileName"/> is completely read
/// into memory first before the iFilters starts to read chunks, when set to <c>false</c> the iFilter reads
/// directly from the <paramref name="fileName"/> and advances reading when the chunks are returned.
/// Default set to <c>false</c></param>
public FilterReader(string fileName,
string extension = "",
bool disableEmbeddedContent = false,
bool includeProperties = false,
bool readIntoMemory = false)
{
try
{
_fileName = fileName;
_fileStream = File.OpenRead(fileName);
if (string.IsNullOrWhiteSpace(extension))
extension = Path.GetExtension(fileName);
_filter = FilterLoader.LoadAndInitIFilter(_fileStream, extension, disableEmbeddedContent, fileName, readIntoMemory);
if (_filter == null)
{
if (string.IsNullOrWhiteSpace(extension))
throw new IFFilterNotFound("There is no " + (Environment.Is64BitProcess ? "64" : "32") +
" bits IFilter installed for the file '" + Path.GetFileName(fileName) + "'");
throw new IFFilterNotFound("There is no " + (Environment.Is64BitProcess ? "64" : "32") +
" bits IFilter installed for the extension '" + extension + "'");
}
_includeProperties = includeProperties;
}
catch (Exception)
{
Dispose();
throw;
}
}
/// <summary>
/// Creates an TextReader object for the given <see cref="Stream"/>
/// </summary>
/// <param name="stream">The file stream to read</param>
/// <param name="extension">The extension for the <paramref name="stream"/></param>
/// <param name="disableEmbeddedContent">When set to <c>true</c> the <see cref="NativeMethods.IFilter"/>
/// doesn't read embedded content, e.g. an attachment inside an E-mail msg file. This parameter is default set to <c>false</c></param>
/// <param name="includeProperties">When set to <c>true</c> the metadata properties of
/// a document are also returned, e.g. the summary properties of a Word document. This parameter
/// is default set to <c>false</c></param>
/// <param name="readIntoMemory">When set to <c>true</c> the <paramref name="stream"/> is completely read
/// into memory first before the iFilters starts to read chunks, when set to <c>false</c> the iFilter reads
/// directly from the <paramref name="stream"/> and advances reading when the chunks are returned.
/// Default set to <c>false</c></param>
public FilterReader(Stream stream,
string extension,
bool disableEmbeddedContent = false,
bool includeProperties = false,
bool readIntoMemory = false)
{
if (string.IsNullOrWhiteSpace(extension))
throw new ArgumentException("The extension cannot be empty", "extension");
_filter = FilterLoader.LoadAndInitIFilter(stream, extension, disableEmbeddedContent, string.Empty, readIntoMemory);
if (_filter == null)
throw new IFFilterNotFound("There is no " + (Environment.Is64BitProcess ? "64" : "32") +
" bits IFilter installed for the stream with the extension '" + extension + "'");
_includeProperties = includeProperties;
}
