public virtual extern void DetectOutboundCodePage([In] SMlCpf dwFlags, [In, MarshalAs(UnmanagedType.LPWStr)] string lpWideCharStr, [In] uint cchWideChar,
[In] IntPtr puiPreferredCodePages, [In] uint nPreferredCodePages, [In] IntPtr puiDetectedCodePages, [In, Out] ref uint pnDetectedCodePages, [In] ref ushort lpSpecialChar);
public static Encoding[] DetectOutgoingEncodings(string input, int[] preferedEncodings, bool preserveOrder)
{
if (input == null)
{
throw new ArgumentNullException("input");
}
if (input.Length == 0)
{
return new Encoding[] { Encoding.ASCII }
}
;
List <Encoding> result = new List <Encoding>();
IMultiLanguage3 multilang3 = new FMultiLanguageClass();
if (multilang3 == null)
{
throw new System.Runtime.InteropServices.COMException("Failed to get IMultilang3");
}
try {
int[] resultCodePages = new int[preferedEncodings.Length];
uint detectedCodepages = (uint)resultCodePages.Length;
ushort specialChar = (ushort)'?';
IntPtr pPrefEncs = Marshal.AllocCoTaskMem(sizeof(uint) * preferedEncodings.Length);
IntPtr pDetectedEncs = preferedEncodings == null ? IntPtr.Zero : Marshal.AllocCoTaskMem(sizeof(uint) * resultCodePages.Length);
try {
if (preferedEncodings != null)
{
Marshal.Copy(preferedEncodings, 0, pPrefEncs, preferedEncodings.Length);
}
Marshal.Copy(resultCodePages, 0, pDetectedEncs, resultCodePages.Length);
SMlCpf options = SMlCpf.MLDETECTF_VALID_NLS | SMlCpf.MLDETECTF_PREFERRED_ONLY;
if (preserveOrder)
{
options |= SMlCpf.MLDETECTF_PRESERVE_ORDER;
}
if (preferedEncodings != null)
{
options |= SMlCpf.MLDETECTF_PREFERRED_ONLY;
}
multilang3.DetectOutboundCodePage(options,
input, (uint)input.Length,
pPrefEncs, (uint)(preferedEncodings == null ? 0 : preferedEncodings.Length),
pDetectedEncs, ref detectedCodepages,
ref specialChar);
if (detectedCodepages > 0)
{
int[] theResult = new int[detectedCodepages];
Marshal.Copy(pDetectedEncs, theResult, 0, theResult.Length);
for (int i = 0; i < detectedCodepages; i++)
{
result.Add(Encoding.GetEncoding(theResult[i]));
}
}
} finally {
if (pPrefEncs != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(pPrefEncs);
}
Marshal.FreeCoTaskMem(pDetectedEncs);
}
} finally {
Marshal.FinalReleaseComObject(multilang3);
}
return(result.ToArray());
}
