c# - 在 C# 中设置 MimeType

Question

在 C# 中设置 mimetypes 是否有比我尝试做的更好的方法提前致谢。

static String MimeType(string filePath)
{
  String ret = null;
  FileInfo file = new FileInfo(filePath);

  if (file.Extension.ToUpper() == ".PDF")
  {
    ret = "application/pdf";
  }
  else if (file.Extension.ToUpper() == ".JPG" || file.Extension.ToUpper() == ".JPEG")
  {
    ret = "image/jpeg";
  }
  else if (file.Extension.ToUpper() == ".PNG")
  {
    ret = "image/png";
  }
  else if (file.Extension.ToUpper() == ".GIF")
  {
    ret = "image/gif";
  }
  else if (file.Extension.ToUpper() == ".TIFF" || file.Extension.ToUpper() == ".TIF")
  {
    ret = "image/tiff";
  }
  else
  {
    ret = "image/" + file.Extension.Replace(".", "");
  }

  return ret;
}

Answer 1

我从 this 得到这个博文:

private string GetMimeType (string fileName)
{
    string mimeType = "application/unknown";
    string ext = System.IO.Path.GetExtension(fileName).ToLower();
    Microsoft.Win32.RegistryKey regKey = Microsoft.Win32.Registry.ClassesRoot.OpenSubKey(ext);
    if (regKey != null && regKey.GetValue("Content Type") != null)
    mimeType = regKey.GetValue("Content Type").ToString();
    return mimeType;
}