Use PowerShell with C# to get any file ‘ContentType’

Here’s an example of how you can use a piece of C# code to create an Static method for getting a file ‘ContentType’.  It just took me a few minutes to look for the sample C# code in the internet that would give me the expected result.

I modify the C# code from this blog ( ) to create my own “”GetContentType” static method in my PowerShell script.

$CSharpCode = @"
using System;
using Microsoft.Win32;
public class Win32file
  public static string GetContentType(string getfileName)
    string contentType = "application/octetstream";
    string ext = System.IO.Path.GetExtension(getfileName).ToLower();

    RegistryKey registryKey = Registry.ClassesRoot.OpenSubKey(ext);

    if (registryKey != null && registryKey.GetValue("Content Type") != null)

    contentType = registryKey.GetValue("Content Type").ToString();

    return contentType;
Add-Type -TypeDefinition $CSharpCode

Usage: [Win32file]::GetContentType(“C:\Temp\GraphicImage.png“)

Result: image/png

Now, this piece of code serve a purpose, and I’m going to be shown it in my next blog post on “How to import a Document into a table BLOB field?”.  YES!! Using PowereShell and much easier than using SSIS.

Stay tuned!