Find guids between strings - regex

Question

Problem:
Trying to get all matches where guid = guid. I'm expecting to receive a collection of matches where one match looks like:
{9659BAE5-632F-4195-BD5D-414C1F2C1066} = {6E298F2A-129A-4491-B053-F12D67561572}
I'm trying to match all of the guid = guid between GlobalSection(NestedProjects) = preSolution and EndGlobalSection specifically. There are other places in the file where guid = guid exists.
Here is a data snippet:
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Client", "Applications\", "{297BE1A3-A6A3-4835-BB87-63B4B4E2AE0D}"
ProjectSection(ProjectDependencies) = postProject
{A459406A-94FF-4CA9-8183-C7472419CC7D} = {A459406A-94FF-4CA9-8183-C7472419CC7D}
EndProjectSection
EndProject
GlobalSection(NestedProjects) = preSolution
{3D84A2B1-536D-4953-B331-D86E421905E7} = {AF46FD2E-710D-49CD-A203-CB0F8B7EF415}
{02CB05EC-6902-417E-AD50-B3910B245B22} = {2F54A6F1-5D32-4673-8AEE-B845CC622D64}
{DE303EF0-E3B1-4BA9-8CB3-544D37D29576} = {2F54A6F1-5D32-4673-8AEE-B845CC622D64}
{5A095236-0EE1-4480-B7A6-833ECCFE4257} = {AF070137-227F-42F7-9487-00CB26C46E04}
{6CCA189C-0D45-4E80-8486-38AB3E625E69} = {AF070137-227F-42F7-9487-00CB26C46E04}
{EAE3152A-C003-4E39-BFB7-B4F7CACE1606} = {AF070137-227F-42F7-9487-00CB26C46E04}
{9659BAE5-632F-4195-BD5D-414C1F2C1066} = {6E298F2A-129A-4491-B053-F12D67561572}
EndGlobalSection
EndGlobal
What I've Tried:
Here's what I'm using to match guid = guid
{[A-Za-z0-9]{8}-[A-Za-z0-9]{4}-[A-Za-z0-9]{4}-[A-Za-z0-9]{4}-[A-Za-z0-9]{12}} = {[A-Za-z0-9]{8}-[A-Za-z0-9]{4}-[A-Za-z0-9]{4}-[A-Za-z0-9]{4}-[A-Za-z0-9]{12}}
This works fine except it doesn't discriminate against the location of the match, obviously. So I receive other matches from other parts of the file.
I've been trying to use a positive look behind like so (with many variations):
(?<=GlobalSection\(NestedProjects\) = preSolution(\r\n|.)+?)
Am I misusing the lookbehind or something else?

Answer 1

I tried the following regex and got correct results using your example.
(?<= GlobalSection\(NestedProjects\) = preSolution(\r\n|.)+?){[A-Za-z0-9]{8}-[A-Za-z0-9]{4}-[A-Za-z0-9]{4}-[A-Za-z0-9]{4}-[A-Za-z0-9]{12}} = {[A-Za-z0-9]{8}-[A-Za-z0-9]{4}-[A-Za-z0-9]{4}-[A-Za-z0-9]{4}-[A-Za-z0-9]{12}}
You may need to use RegexOptions.Multiline as an option in your regex since it is C# (if you're not already).
EDIT
I wrote a little test program with your data snippet. I doubled it to make sure it did not just match the first group after GlobalSection(NestedProjects) = preSolution
matches only returned the GUIDs between GlobalSection(NestedProjects) = preSolution and EndGlobalSection for both sections.
The line {A459406A-94FF-4CA9-8183-C7472419CC7D} = {A459406A-94FF-4CA9-8183-C7472419CC7D} was not in the matched results as I would expect. I hope something in this code helps you out.
static void Main(string[] args)
{
string input = System.IO.File.ReadAllText(#"c:\test\directory\test.txt");
string pattern =
#"(?<=GlobalSection\(NestedProjects\) = preSolution(\r\n|.)+?){[A-Za-z0-9]{8}-[A-Za-z0-9]{4}-[A-Za-z0-9]{4}-[A-Za-z0-9]{4}-[A-Za-z0-9]{12}} = {[A-Za-z0-9]{8}-[A-Za-z0-9]{4}-[A-Za-z0-9]{4}-[A-Za-z0-9]{4}-[A-Za-z0-9]{12}}";
Regex re = new Regex(pattern, RegexOptions.Multiline);
MatchCollection matches = re.Matches(input);
foreach (var match in matches)
{
Console.Write(match);
}
}