Get file type in .NET

Question

How can i get type of file using c#. for example if a file name id \"abc.png\" and type of file will \"PNG Image\" same as third column \"Type\" in window explorer.

Answer 1

If you do not want to use P/Invoke and rather would like to look at the registry yourself:

private Dictionary GetRegistryFileTypes()
{
  Dictionary results = new Dictionary();

  using (RegistryKey rootKey = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\KindMap"))
    if (rootKey != null)
      foreach (string currSubKey in rootKey.GetValueNames())
        results.Add(currSubKey, rootKey.GetValue(currSubKey).ToString());

  return results;
}

Then you can use the extension as a key to get the Registry data for the extension:

string fileType = GetRegistryFileTypes()[Path.GetExtension(filePath)];

if (fileType != null && fileType.Length > 0)
  // do whatever here