Link two DataTable in a DataGrid : DataGrid « ADO.Net « C# / CSharp Tutorial

1. C# / CSharp Tutorial
2. ADO.Net
3. DataGrid

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Data.Common;

public class DataTableLinkinDataGrid : System.Windows.Forms.Form
{
  private System.Windows.Forms.DataGrid dataGrid1;

  private System.Data.DataSet dtSet;

  public DataTableLinkinDataGrid()
  {
    this.dataGrid1 = new System.Windows.Forms.DataGrid();
    ((System.ComponentModel.ISupportInitialize)(this.dataGrid1)).BeginInit();
    this.SuspendLayout();
    // 
    this.dataGrid1.DataMember = "";
    this.dataGrid1.HeaderForeColor = System.Drawing.SystemColors.ControlText;
    this.dataGrid1.Location = new System.Drawing.Point(16, 8);
    this.dataGrid1.Size = new System.Drawing.Size(384, 240);
    // 
    // DataTableLinkinDataGrid
    // 
    this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
    this.ClientSize = new System.Drawing.Size(416, 273);
    this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                    this.dataGrid1});
    ((System.ComponentModel.ISupportInitialize)(this.dataGrid1)).EndInit();
    this.ResumeLayout(false);
    
    CreateCustomersTable();
        CreateOrdersTable();
        BindData();
  }

  [STAThread]
  static void Main() 
  {
    Application.Run(new DataTableLinkinDataGrid());
  }

  private void CreateCustomersTable()
  {
    System.Data.DataTable custTable = new DataTable("Customers");
    DataColumn dtColumn;
    DataRow myDataRow;

    dtColumn = new DataColumn();
    dtColumn.DataType = System.Type.GetType("System.Int32");
    dtColumn.ColumnName = "id";
    dtColumn.Caption = "Cust ID";
    dtColumn.ReadOnly = true;
    dtColumn.Unique = true;
    custTable.Columns.Add(dtColumn);

    dtColumn = new DataColumn();
    dtColumn.DataType = System.Type.GetType("System.String");
    dtColumn.ColumnName = "Name";
    dtColumn.Caption = "Cust Name";
    dtColumn.AutoIncrement = false;
    dtColumn.ReadOnly = false;
    dtColumn.Unique = false;
    custTable.Columns.Add(dtColumn);


    dtColumn = new DataColumn();
    dtColumn.DataType = System.Type.GetType("System.String");
    dtColumn.ColumnName = "Address";
    dtColumn.Caption = "Address";
    dtColumn.ReadOnly = false;
    dtColumn.Unique = false;
    custTable.Columns.Add(dtColumn);

    DataColumn[] PrimaryKeyColumns = new DataColumn[1];
    PrimaryKeyColumns[0] = custTable.Columns["id"];
    custTable.PrimaryKey = PrimaryKeyColumns;

    dtSet = new DataSet("Customers");
    dtSet.Tables.Add(custTable);

    myDataRow = custTable.NewRow();
    myDataRow["id"] = 1001;
    myDataRow["Address"] = "address 1";
    myDataRow["Name"] = "G";
    custTable.Rows.Add(myDataRow);

    myDataRow = custTable.NewRow();
    myDataRow["id"] = 1002;
    myDataRow["Name"] = "R";
    myDataRow["Address"] = "address 2";
    custTable.Rows.Add(myDataRow);

    myDataRow = custTable.NewRow();
    myDataRow["id"] = 1003;
    myDataRow["Name"] = "M";
    myDataRow["Address"] = "address 3";
    custTable.Rows.Add(myDataRow);
    
  }

  private void CreateOrdersTable()
  {
    DataTable ordersTable = new DataTable("Orders");
    DataColumn dtColumn;
    DataRow dtRow;

    dtColumn = new DataColumn();
    dtColumn.DataType= System.Type.GetType("System.Int32");
    dtColumn.ColumnName = "OrderId";
    dtColumn.AutoIncrement = true;
    dtColumn.Caption = "Order ID";
    dtColumn.ReadOnly = true;
    dtColumn.Unique = true;
    ordersTable.Columns.Add(dtColumn);

    dtColumn = new DataColumn();
    dtColumn.DataType= System.Type.GetType("System.String");
    dtColumn.ColumnName = "Name";
    dtColumn.Caption = "Item Name";
    ordersTable.Columns.Add(dtColumn);

    // Create CustId column which reprence CustId from 
    // the custTable
    dtColumn = new DataColumn();
    dtColumn.DataType= System.Type.GetType("System.Int32");
    dtColumn.ColumnName = "CustId";
    dtColumn.AutoIncrement = false;
    dtColumn.Caption = "CustId";
    dtColumn.ReadOnly = false;
    dtColumn.Unique = false;
    ordersTable.Columns.Add(dtColumn);

    dtColumn = new DataColumn();
    dtColumn.DataType= System.Type.GetType("System.String");
    dtColumn.ColumnName = "Description";
    dtColumn.Caption = "Description Name";
    ordersTable.Columns.Add(dtColumn);

    dtSet.Tables.Add(ordersTable);

    dtRow = ordersTable.NewRow();
    dtRow["OrderId"] = 0;
    dtRow["Name"] = "Book";
    dtRow["CustId"] = 1001 ;
    dtRow["Description"] = "desc 1" ;
    ordersTable.Rows.Add(dtRow);
    
    dtRow = ordersTable.NewRow();
    dtRow["OrderId"] = 1;
    dtRow["Name"] = "Book";
    dtRow["CustId"] = 1001 ;
    dtRow["Description"] = "desc 2" ;
    ordersTable.Rows.Add(dtRow);

  }

    private void BindData()
    {
        DataRelation dtRelation;
        DataColumn CustCol = dtSet.Tables["Customers"].Columns["id"];
        DataColumn orderCol = dtSet.Tables["Orders"].Columns["CustId"];
        
        dtRelation = new DataRelation("CustOrderRelation", CustCol, orderCol);
        dtSet.Tables["Orders"].ParentRelations.Add(dtRelation);

        dataGrid1.SetDataBinding(dtSet,"Customers");
    }       


}

32.52.DataGrid
	32.52.1.	Load data in DataTable to DataGrid
	32.52.2.	Link two DataTable in a DataGrid
	32.52.3.	Load Data to DataGrid
	32.52.4.	DataGrid View: on data error
	32.52.5.	Data binding for Multiple Controls
	32.52.6.	Binding DataSet to DataGrid
	32.52.7.	Programmatic Data Display