DataRelation in ADO .Net

Question

hi Can anybody describe about DataRealtion in ASP .Net

SIVA · Answer

Hi, You can go for following links to know more about DataRelation Which are C-sharpcorner articles http://www.c-sharpcorner.com/uploadfile/mahesh/datarelation-in-ado-net/ http://www.c-sharpcorner.com/UploadFile/718fc8/working-with-datarelation-class-in-ado-net/

Satyapriya Nayak · Answer

Hi Siva, A DataRelation is used to relate two DataTable objects to each other through DataColumn objects. For example, in a Customer/Orders relationship, the Customers table is the parent and the Orders table is the child of the relationship. Refer http://msdn.microsoft.com/en-us/library/dz0az7c7%28vs.71%29.aspx 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"; } } } Thanks

DataRelation in ADO .Net

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