Image inside datagrid column

If you want to use a string then you need to use pack notation like that code in my post above.

For example:

"pack://application:,,,/Subfolder/ResourceFile.png"

<Image Source="pack://application:,,,/AssemblyName;component/Images/image_to_use.png">

http://stackoverflow.com/questions/21788855/binding-an-image-in-wpf-mvvm

https://msdn.microsoft.com/en-us/library/vstudio/aa970069%28v=vs.100%29.aspx?f=255&MSPPError=-2147217396

I recommend writing some code which loads the file and using that to ensure your pack notation is correct, since it's easy to mess it up.

Once you're confident you have that uri working you can ditch your code and just set the string.