DataRelation class

Question

Hi.... How can we use DataRelation class in ADO.NET and define properties ?

Satyapriya Nayak · Answer

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"; } } } Please refer Our recommended articles Thanks

DataRelation class

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