Datatable to html Table

Question

I have question, that maybe someone here wouldn\'t mind to help me with. I have lets say 3 datatables, each one of them has the following columns:

size, quantity, amo

Answer 1

The first answer is correct, but if you have a large amount of data (in my project I had 8.000 rows * 8 columns) is tragically slow.... Having a string that becomes that large in c# is why that solution is forbiden

Instead using a large string I used a string array that I join at the end in order to return the string of the html table. Moreover, I used a linq expression ((from o in row.ItemArray select o.ToString()).ToArray()) in order to join each DataRow of the table, instead of looping again, in order to save as much time as possible.

This is my sample code:

private string MakeHtmlTable(DataTable data)
{
            string[] table = new string[data.Rows.Count] ;
            long counter = 1;
            foreach (DataRow row in data.Rows)
            {
                table[counter-1] = "" + String.Join("", (from o in row.ItemArray select o.ToString()).ToArray()) + "";

                counter+=1;
            }

            return "
" + String.Join("", table) + "";
}