example | C# .NET | Isolating a directory that DOES or DOES NOT contain a particular substring

Intent: This is useful in instances when you have a highly organized archive with different, similarly-named directories in them, e.g. FolderNameRAW and FolderNameTIF

Overview:   Declare a string array using the Directory.GetDirectories() method. Iterate over each string in the array. Use the string.IndexOf method to  isolate the substring of interest. Execute a comparison, with a result of >= 1 meaning that the substring is found, and a comparison of == -1 indicating that the substring was not found. 

 

   string[] dirs = Directory.GetDirectories(sourceImageDirBase);

            foreach (string dir in dirs)
            {
                if (dir.IndexOf("RAW") >= 1)
                {

                    // Do something here to images that DO have the string RAW as part of their name
                }

                {
                    if (dir.IndexOf("RAW") == -1)
                    {

                    // Do something here to images that DO NOT have the string RAW as part of their name

                    }

                }

            }