C# Converting List to 2d list and adding additional values

Question

Hello need some assistance with this issue. Hopefully i can describe it well.

I have a parser that goes though a document and find sessionID's, strips some tags from them and places them into a list.

  while ((line = sr.ReadLine()) != null)
            {
                Match sID = sessionId.Match(line);
                if (sID.Success)
                {
                    String sIDString;
                    String sid = sID.ToString();
                    sIDString = Regex.Replace(sid, "<[^>]+>", string.Empty);
                    sessionIDList.Add(sIDString);
                }
            }

Then I go thought list and get the distinctSessionID's.

    List<String> distinctSessionID = sessionIDList.Distinct().ToList();

Now I need to go thought he document again and add the lines that match the sessionID and add them to the list. This is the part that I am having issue with.

Do I need to create a 2d list so I can add the matching log lines to the corresponding sessionids.

I was looking at this but cannot seem to figure out a way that I could copy over my Distinct list then add the Lines I need into the new array.

From what I can test it looks like this would add the value into the masterlist

List<List<string>> masterLists = new List<List<string>>();
 Foreach (string value in distinctSessionID)
{
  masterLists[0].Add(value);
}

How do I add Lines I need to the corresponding Masterlist. Say masterList[0].Add value is 1, how do i add the lines to 1?

          masterList[0][0].add(myLInes);

Basically i want

    Sessionid1
        -------> related log line
        -------> Related log line 
   SessionID2 
        -------> related log line
        -------> related log line.

So on and so forth. I have the parsing all working, it's just getting the values into a 2nd string list is the issue.

Thanks,

Ovais Khatri · Accepted Answer · 2016-02-01 18:03:20Z

0

What you can do is, simple create a class with public properties, and make list of that custom class.

public class Session
{
  public int SessionId{get;set;}
  public List<string> SessionLog{get;set;}
}

List<Session> objList = new List<Session>();

var session1 = new Session();
session1.SessionId = 1;
session1.SessionLog.Add("description lline1");

objList.Add(session1);

answered Feb 1, 2016 at 18:03

Ovais Khatri

3,21118 silver badges15 bronze badges

Sign up to request clarification or add additional context in comments.

7 Comments

user1158745 Over a year ago

Session 1 can have multiple entries though. How would i incorporate that when I am adding?

user1158745 Over a year ago

Also the session ID can be a number or a number and string. So SessionID will need to be a string.

user1158745 Over a year ago

So i changed it to a string for the SessionID. Howerver, when I am testing session1.SessionLog.Add("description lline1"); I keep on getting a NullReferenceException. {"Object reference not set to an instance of an object."}

Raj Karri Over a year ago

Add session1.SessionLog = new List<string>(); after session1.SessionId = 1;

user1158745 Over a year ago

Last question. How would I add multiple to session1.SessionLog.add ? This is how i have it, but it always seems to be writing to index zero for The session log. It's the correct session DI but not log. objList[0].SessionLog.add("test1"); objList[0].SessionLog.add("test2");

|

Community · Accepted Answer · 2017-05-23 11:52:26Z

0

Here is one way to do it:

 public class MultiDimDictList: Dictionary<string, List<int>>  { }
 MultiDimDictList myDictList = new MultiDimDictList ();
 Foreach (string value in distinctSessionID)
{
     myDictList.Add(value, new List<int>()); 
     for(int j=0; j < lengthofLines; j++)
     {
         myDictList[value].Add(myLine);
     }
}

You would need to replace lengthofLines with a number to indicate how many iterations of lines you have.

See Charles Bretana's answer here

edited May 23, 2017 at 11:52

CommunityBot

11 silver badge

answered Feb 1, 2016 at 17:36

devlin carnate

8,6617 gold badges55 silver badges106 bronze badges

Collectives™ on Stack Overflow

C# Converting List to 2d list and adding additional values

2 Answers 2

7 Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

7 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related