private static string GetMimeTypeByExtension(string fileName)
{
string mimeType;
MimeTypeHelper.TryGetMimeTypeByExtension(fileName, out mimeType);
return(mimeType);
}
/// <summary>
/// Gets the MimeType for the specified file, based on it's extension if possible, otherwise on its content.
/// </summary>
/// <param name="fileName">The path to the file to investigate.</param>
/// <returns>The Mime Type for the file if successfull; otherwise return 'unknown/unknown'.</returns>
/// <exception cref="ArgumentNullException">thrown if the <paramref name="fileName"/> is <c>Null</c> or Empty.</exception>
/// <exception cref="FileNotFoundException">thrown if the file specified by the parameter <paramref name="fileName"/> does not exist.</exception>
public static string GetMimeType(string fileName)
{
if (fileName.IsNullEmptyOrWhiteSpace())
{
throw new ArgumentNullException("fileName");
}
if (!File.Exists(fileName))
{
throw new FileNotFoundException(string.Format("{0} not found", fileName));
}
string mimeType;
if (!MimeTypeHelper.TryGetMimeTypeByExtension(fileName, out mimeType))
{
MimeTypeHelper.TryGetMimeTypeByData(new System.IO.FileInfo(fileName).OpenRead().ToByteArray(), out mimeType);
}
return(mimeType);
}
