Two dimensional c# array list?

[agam]

Hello guys,
I have a rather simple question.
I have two Arraylist's and I need to add them both at the same time into a DataGridView.
Here is the basic code I used:

protected ArrayList fPath = new ArrayList();
        protected ArrayList md5File = new ArrayList();
...
 
foreach (string fp in fPath)
                            {
                        foreach (string md5 in md5File)
                        {
 
                            int rw1 = dataGrid.Rows.Add();
                            int rw2 = dataGrid.Rows.Add() - 1;
 
                            //Array file path
                            dataGrid.Rows[rw1].Cells[0].Value = fp;
 
                            //Array md5
                            dataGrid.Rows[rw2].Cells[1].Value = md5;
                       }
 

This is the only solution for inserting data to the datagridview in the same row...
And I think that this function is quite a ram eater.
So I deiced to make this better.
I wanted to create a two dimensional arraylist - so it could size up dynamically.

protected ArrayList[,] both = new ArrayList();
both[0,x] = fpath values
both[2,0] = md5File values;
 

How can I do that/ or do you have any better suggestions.

[Rohit Garg]

You can add an ArrayList as a single item in another ArrayList which makes the 2nd ArrayList a Multidimentional ArrayList

ArrayList both = new ArrayList();
        for (int i = 0; i < fPath.Count; i++)
        {
            ArrayList temp = new ArrayList();
            temp.Add(fPath[i]);
            temp.Add(md5File[i]);
            both.Add(temp);
        }
 

[Curtis Rutland]

Yes, I have better suggestions. First, don't use ArrayList. There's absolutely no need anymore. It was necessary in .NET 1.1, when there were no generics, but it's 2011 now. Use List<T>.

And second, if I understand you correctly, you really don't want multidimensional arrays, you want one array of elements that consist of two pieces of data tied together. Create a class.

public class MyData
{
  public string FilePath { get; set; }
  public string MD5Hash { get; set; }
}
...
...
List<MyData> list = new List<MyData>();
...

Also, you should look into using the DataSource property of the DataGridView. You don't have to manually add each entry, you can just bind a list of content directly to the grid.