CODEWITHSUNDEEP
c#.netarrayscollections
chris
chris

Reputation: 3911

A Good C# Collection

What's a good collection in C# to store the data below:

I have check boxes that bring in a subjectId, varnumber, varname, and title associated with each checkbox.

I need a collection that can be any size, something like ArrayList maybe with maybe:

      list[i][subjectid] = x;
      list[i][varnumber] = x;
      list[i][varname] = x;
      list[i][title] = x;

Any good ideas?

Upvotes: 7

Views: 339

Answers (8)

Kev
Kev

Reputation: 119806

If there's an outside chance that the order of [i] is not in a predictable order, or possibly has gaps, but you need to use it as a key:

public class Thing
{
    int SubjectID { get; set; }        
    int VarNumber { get; set; }
    string VarName { get; set; }
    string Title { get; set; }
}

Dictionary<int, Thing> things = new Dictionary<int, Thing>();
dict.Add(i, thing);

Then to find a Thing:

var myThing = things[i];

Upvotes: 0

Colin Mackay
Colin Mackay

Reputation: 19175

As others have said, it looks like you'd be better creating a class to hold the values so that your list returns an object that contains all the data you need. While two-dimensional arrays can be useful, this doesn't look like one of those situations.

For more information about a better solution and why a two-dimensional array/list in this instance isn't a good idea you might want to read: Create a list of objects instead of many lists of values

Upvotes: 0

Frazell Thomas
Frazell Thomas

Reputation: 6111

Since this is a Key, Value pair I would recommend you use a generic IDictionary based collection.

// Create a new dictionary of strings, with string keys, 
// and access it through the IDictionary generic interface.
IDictionary<string, string> openWith = 
    new Dictionary<string, string>();

// Add some elements to the dictionary. There are no 
// duplicate keys, but some of the values are duplicates.
openWith.Add("txt", "notepad.exe");
openWith.Add("bmp", "paint.exe");
openWith.Add("dib", "paint.exe");
openWith.Add("rtf", "wordpad.exe");

Upvotes: 0

Alan
Alan

Reputation: 46813

Determining what collection, typically begins with what do you want to do with it?

If your only criteria is it can be anysize, then I would consider List<>

Upvotes: 0

Will A
Will A

Reputation: 24988

A generic list, List<YourClass> would be great - where YourClass has properties of subjectid, varnumber etc.

Upvotes: 1

Robert Harvey
Robert Harvey

Reputation: 180787

public Class MyFields
{
    public int SubjectID { get; set; }        
    public int VarNumber { get; set; }
    public string VarName { get; set; }
    public string Title { get; set; }
}

var myList = new List<MyFields>();

To access a member:

var myVarName = myList[i].VarName;

Upvotes: 7

Hans Passant
Hans Passant

Reputation: 941227

A List<Mumble> where Mumble is a little helper class that stores the properties.

List<Mumble> list = new List<Mumble>();
...
var foo = new Mumble(subjectid);
foo.varnumber = bar;
...
list.Add(foo);
,..
list[i].varname = "something else";

Upvotes: 14

Elliot Bonneville
Elliot Bonneville

Reputation: 53291

You'd likely want to use a two-dimensional array for this, and allocate positions in the second dimension of the array for each of your values. For instance, list[i][0] would be the subjectid, list[i][1] would be varnumber, and so on.

Upvotes: 0

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