DataRelation class

Hi Aaron,

DataRelation class represents a parent/child relationship between two DataTable objects.

Here is an example


using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.OleDb;
namespace Data_relation
{
    public partial class Form1 : Form
    {
        string ConnectionString = System.Configuration.ConfigurationSettings.AppSettings["dsn"];
        OleDbCommand com;
        OleDbDataAdapter oda;
        DataSet ds;
        DataRelation dr;
        string str;
        public Form1()
        {
            InitializeComponent();
        }

        private void btndisplay_Click(object sender, EventArgs e)
        {
            OleDbConnection con = new OleDbConnection(ConnectionString);
            con.Open();
            str = "select * from product";
            com = new OleDbCommand(str, con);
            oda = new OleDbDataAdapter(com);
            ds = new DataSet();
            oda.Fill(ds, "product");

            str = "select * from customer";
            com = new OleDbCommand(str, con);
            oda = new OleDbDataAdapter(com);
            oda.Fill(ds, "customer");
            con.Close();

            DataColumn dc1 = new DataColumn();
            DataColumn dc2 = new DataColumn();
            dc1 = ds.Tables["product"].Columns["prodid"];
            dc2 = ds.Tables["customer"].Columns["prodid"];
            dr = new DataRelation("Customers taking this product are", dc1, dc2);
            ds.Relations.Add(dr);
            dataGrid1.DataSource = ds;
            dataGrid1.DataMember = "product";

        }

      
    }
}


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Thanks