C#

1. Create a UI that will allow you to display and edit the table data. You can choose an appropriate control based on technology you are using.
2. Handle the click event of the button and create a table object in it. Also, add 30 rows to it.
3. In case you want to retain all the tables, make sure they are stored in some class level list (for desktop applications) or in session or any other appropriate object/file (for web application).

• Burning and Erasing CD/DVD/Blu-ray Media with C# and IMAPI2[^]

public class LinqTester
{
  public void Test()
  {
    LinqCollection collection = new LinqCollection(
    List<LinqItem> values = collection.Where(x =>
    {
      string value = string.Empty;
      x.GetValue(6, ref value);
      return value == "6";
    }).ToList();

    // Should have one value here - you can do something with it now.
  }
}

public class LinqCollection : List<LinqItem>
{
  public LinqCollection()
  {
    for (int i = 0; i < 10; i++)
    {
      this.Add(new LinqItem { Id = i });
    }
  }
}

public class LinqItem
{
  public int Id { get; set; }
  public void GetValue(int item, ref string value)
  {
    value = Id.ToString();
  }
}

static class YourExtensions
{
    // NB: In this case, a specific type would be better, since it's not
    //     immediately obvious which tuple item represents which value.
    
    public static Tuple<string, string> GetValue(this YourType id, int theParameter)
    {
        string strValue = null;
        string result = id.GetValue(theParameter, ref strValue);
        return Tuple.Create(result, strValue);
    }
}
...
var objCol = from id in ids
             let value = id.GetValue(2)
             where value.Item1 == "6"
             select new { id, strValue = value.Item2 };

OriginalGriff wrote:

a commercial package such as WinZIP