Creating a Class that can be a list?

[bbranded]

Hello, I'm a little lost as to how to write a class that will take in arguments from the .Add function of a List<>. With reference to this thread, I have written the following class.

 public class SnapShot
    {
        private DateTime m\_SnapShotDateTime;

        public DateTime SnapShotDateTime
        {
            get
            {
                return m\_SnapShotDateTime;
            }
            set
            {
                m\_SnapShotDateTime = value;
            }

        }

        private long m\_BPSAverage;

        public long BPSAverage
        {
            get
            {
                return m\_BPSAverage;
            }
            set
            {
                m\_BPSAverage = value;
            }
        }

        public SnapShot(DateTime snapshotdatetime, long bpsaverage)
        {
            m\_SnapShotDateTime = snapshotdatetime;
            m\_BPSAverage = bpsaverage;
        }

    }

I have created a List and would like to use the .Add function to add "entries" for .SnapShot(DateTime snapshotdatetime, long bpsaverage).

      SnapShot LiveSnapshot;
      List LiveSnapshotList = new List();

      //LiveSnapshotList.Add();

How do I properly write the class so that it handles the .Add function of the List? Or should I be calling .Add with some other overload value? Thanks, Matt

[Luc Pattyn]

Hi, 1. you don't need to create a special list class, a simple:

List<SnapShot> snapShots=new List<SnapShot>();
SnapShot snap=new SnapShot(...);
snapShots.Add(snap);
...
List<SnapShot> moreSnapShots=new List<SnapShot>();
moreSnapShots.Add(...);
snapShots.Add(moreSnapShots);

would work just fine. 2. And you could make that slightly more user-friendly with an almost empty class like this:

class SnapShotList : List<SnapShot> {}

SnapShotList snapShots=new SnapShotList();
SnapShot snap=new SnapShot(...);
snapShots.Add(snap);
...
SnapShotList moreSnapShots=new SnapShotList();
moreSnapShots.Add(...);
snapShots.Add(moreSnapShots);

:)

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]

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Merry Christmas and a Happy New Year to all.

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[Saksida Bojan]

bbranded wrote:

I'm a little lost as to how to write a class that will take in arguments from the .Add function of a List<>.

If you use List, then do not handle .Add, because it is implemented. As your example you incorrectly defined List.

List<SnapShot > LiveSnapshot = new List<SnapShot>();

[bbranded]

Thanks very much Luc. I will take a look into this. As for snap, this is of the type SnapShot as defined via the SnapShot class's SnapShot function? Thanks, Matt

[Luc Pattyn]

bbranded wrote:

as defined via the SnapShot class's SnapShot function?

yes. however functions are passé, you should call them methods now; unless they are constructors! :)

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]

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Merry Christmas and a Happy New Year to all.

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[realJSOP]

public class SnapShotList : List {}

Then you can do this:

SnapShotList snapshots = new SnapShotList();

As a result, you get all of the benefits of having a list (including all of the methods therein) in a conveniently named object, and you can add specific custom behavior to your class to handle circumstances ragarding the items in the list. I do it all the time.

.45 ACP - because shooting twice is just silly
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[DaveyM69]

:laugh: 5ed :thumbsup:

Dave
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Why are you using VB6? Do you hate yourself? (Christian Graus)

[Lost User]

Haha! What do you call a Lambda Then Luc?

[Luc Pattyn]

I'm afraid I can't answer that on a public forum. :-O

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]

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Merry Christmas and a Happy New Year to all.

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