/// <summary>
/// Gets the language string of the path specified using the format that the installer
/// expects to find them in in the database.
/// </summary>
/// <param name="path">Path to the file</param>
/// <returns>Language string in the form of a decimal language ID, or an empty string if the file
/// does not contain a language ID</returns>
/// <exception cref="FileNotFoundException">the file does not exist or could not be read</exception>
/// <remarks><p>
/// Win32 MSI API:
/// <a href="http://msdn.microsoft.com/library/en-us/msi/setup/msigetfileversion.asp">MsiGetFileVersion</a>
/// </p></remarks>
public static string GetFileLanguage(string path)
{
StringBuilder language = new StringBuilder("", 10);
uint verBufSize = 0, langBufSize = 0;
uint ret = NativeMethods.MsiGetFileVersion(path, null, ref verBufSize, language, ref langBufSize);
if (ret == (uint)NativeMethods.Error.MORE_DATA)
{
language.Capacity = (int)++langBufSize;
ret = NativeMethods.MsiGetFileVersion(path, null, ref verBufSize, language, ref langBufSize);
}
if (ret != 0 && ret != (uint)NativeMethods.Error.FILE_INVALID)
{
if (ret == (uint)NativeMethods.Error.FILE_NOT_FOUND ||
ret == (uint)NativeMethods.Error.ACCESS_DENIED)
{
throw new FileNotFoundException(null, path);
}
else
{
throw InstallerException.ExceptionFromReturnCode(ret);
}
}
return(language.ToString());
}