Adding another New Row for the same ID

I have a simple application for taking Customer orders and their Products. I am using Visual Studio 2008 Express Edition and MS Access 2007.

My application uses multiple forms. One of the forms is an Add form from where a New Customer along with his/her details like address, phone, city, state etc can be added. Another form is for the Product Details to be added.

I want to know how to add Multiple Rows for the same CustomerID record, as a Customer can order multiple products. I am using the following code for the Add button:

 Private Sub cmdAdd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdAdd.Click          MyBindingSource.EndEdit()         DialogResult = Windows.Forms.DialogResult.OK      End Sub

This adds a new Customer into the Database. I have another code for Auto Incrementing the CustomerID.

Now I need to know how to add 2 or more rows for this same CustomerID record.

How can I do this ?

Can anyone help please ?

Hi Maneesh,

Try this...

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";

        }


    }
}

Thanks

1 Reply

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Satyapriya Nayak14y ago
Hi Maneesh,

Try this...

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";

        }


    }
}

Thanks