Mega Code Archive
Bind two DataGrids with many to many mapping
<![CDATA[
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Data.SqlClient;
public class Form1 : System.Windows.Forms.Form{
private System.Windows.Forms.DataGrid dataGrid1;
private System.Data.DataSet dataSet1;
private System.ComponentModel.Container components = null;
public Form1() {
InitializeComponent();
}
private void InitializeComponent(){
this.dataGrid1 = new System.Windows.Forms.DataGrid();
this.dataSet1 = new System.Data.DataSet();
((System.ComponentModel.ISupportInitialize)(this.dataGrid1)).BeginInit();
((System.ComponentModel.ISupportInitialize)(this.dataSet1)).BeginInit();
this.SuspendLayout();
this.dataGrid1.DataMember = "";
this.dataGrid1.HeaderForeColor = System.Drawing.SystemColors.ControlText;
this.dataGrid1.Location = new System.Drawing.Point(0, 0);
this.dataGrid1.Name = "dataGrid1";
this.dataGrid1.Size = new System.Drawing.Size(400, 200);
this.dataGrid1.TabIndex = 0;
this.dataSet1.DataSetName = "NewDataSet";
this.dataSet1.Locale = new System.Globalization.CultureInfo("en-US");
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(400, 196);
this.Controls.Add(this.dataGrid1);
this.Name = "Form1";
this.Text = "Form1";
this.Load += new System.EventHandler(this.Form1_Load);
((System.ComponentModel.ISupportInitialize)(this.dataGrid1)).EndInit();
((System.ComponentModel.ISupportInitialize)(this.dataSet1)).EndInit();
this.ResumeLayout(false);
}
[STAThread]
static void Main() {
Application.Run(new Form1());
}
private void Form1_Load(object sender, System.EventArgs e) {
string connString = "server=(local)\\SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI";
string qry1 = @"select * from employee ";
string qry2 = @"select * from order";
string sql = qry1 + qry2;
SqlConnection conn = new SqlConnection(connString);
SqlDataAdapter da = new SqlDataAdapter(sql, conn);
da.TableMappings.Add("Table", "employee");
da.TableMappings.Add("Table1", "order");
da.Fill(dataSet1);
DataRelation dr = new DataRelation(
"employeeorders",
dataSet1.Tables[0].Columns["employeeid"],
dataSet1.Tables[1].Columns["employeeid"]
);
dataSet1.Relations.Add(dr);
dataGrid1.SetDataBinding(dataSet1, "employees");
}
}
]]>