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How To Compare Two Lists Using Regex?

I Have Two Lists,

1. List<string>IDList //DM-0016 (ID:225),LPG Test (ID:232), 18S1(ID:290)..
2List<string>Names // DM-0016,LPG Test, 18S1..

List<string>IDList //DM-0016 (ID:225),LPG Test (ID:232), 18S1(ID:290)..

List<string>Names // DM-0016,LPG Test, 18S1..

The Second List is basically the same as the First but it doesn't have the IDs.
I am Showing the Second List in a Multiple Choice Dialog, Where, user can select multiple items.

I have a Regular Expression (@"(?<=(ID:)[0-9]+"); This returns only the the number inside (ID:)
I want to compare these two Lists based on this RegEX, Where, I want only the ID's of the selected items.

(@"(?<=(ID:)[0-9]+");

For Ex: If DM-0061 is selected i'll get 225 like so.

1 Answer
1

If you use a regular expression such as:

(?<key>.*?)s(ID:(?<value>[0-9]+))


You can project your original list to a dictionary and easily use it as a lookup:

var list = new List<string>(){
"DM-0016 (ID:225)","LPG Test (ID:232)", "18S1 (ID:290)"
};
var regex = new Regex(@"(?<key>.*?)s(ID:(?<value>[0-9]+))");
var dict = list.Select(i => regex.Match(i)).ToDictionary(k => k.Groups["key"].Value, v => v.Groups["value"].Value);
Console.WriteLine(dict["DM-0016"]); // writes 225


Live example: http://rextester.com/PMTUFW14656

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