C#, DataTable to ArrayList?

Question

I have a datatable with few rows each row has few columns.
I want to create an arraylist that countain all row as a string
so each array item look like this {1

Answer 1

Instead of using an ArrayList I would recommend you using a strongly typed collection because an ArrayList wouldn't bring much value compared to a non-strongly typed DataTable. So you could start by defining a model that will represent each row:

public class MyModel
{
    public int Id { get; set; }
    public string Prop1 { get; set; }
    public string Prop2 { get; set; }
}

then loop over your DataTable and fill the collection:

List models = new List();
foreach (DataRow row in dt.Rows)
{
    MyModel model = new MyModel 
    {
        Id = (int)row[0],
        Prop1 = (string)row[1],
        Prop2 = (string)row[2]
    };
    models.Add(model);
}

Or you could use LINQ if you prefer:

List models = dt.Rows
    .Cast()
    .Select(row => new MyModel { 
        Id = (int)row[0],
        Prop1 = (string)row[1],
        Prop2 = (string)row[2]
    })
    .ToList();