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ADO.NET

ADO.NET Projects

ADO.NET Project 1

ADO.NET Examples

Examples

Merge Case 2: Same Table Structures,No Primary Key
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  1. In the strongly typed DataSet, Table0 can be used as a sample table that has no primary keys defined on it.
  2. Binding the student datasource in table1 and table2
  3. write the code
    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 WindowsFormsApplication15
    {
    public partial class Form1 : Form
    {
    public Form1()
    {
    InitializeComponent();
    }
    DataTable ftb = new DataTable();
    DataTable stb = new DataTable();
    private void Form1_Load(object sender, EventArgs e)
    {
    ftb.Columns.Add("Eno", typeof(Int32));
    ftb.Columns.Add("Ename", typeof(String));
    ftb.PrimaryKey = new DataColumn[] { ftb.Columns["Eno"] };
    ftb.LoadDataRow(new object[] { "1", "Ashish" }, true);
    ftb.LoadDataRow(new object[] { "2", "KAMAL" }, true);
    stb.Columns.Add("Eno", typeof(Int32));
    stb.Columns.Add("Ename", typeof(String));
    stb.LoadDataRow(new object[] { "2", "Aditya" }, true);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 WindowsFormsApplication14
    {
    public partial class Form1 : Form
    {
    public Form1()
    {
    InitializeComponent();
    }
    private void Form1_Load(object sender, EventArgs e)
    {
    // TODO: This line of code loads data into the 
    //'studentDataSet.student2' table.
     You can move, or remove it, as needed.
    this.student2TableAdapter.Fill(this.studentDataSet.student2);
    // TODO: This line of code loads data into the 
    //'studentDataSet.std1' table. 
    You can move, or remove it, as needed.
    this.std1TableAdapter.Fill(this.studentDataSet.std1);
    }
    private void button1_Click(object sender, EventArgs e)
    {
    OleDbConnection con = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.
    4.0;Data Source=F:\\student.mdb");
    OleDbDataAdapter ad = new OleDbDataAdapter("select * from std1", con);
    DataTable tb1 = new DataTable();
    ad.Fill(tb1);
    //dataGridView4.Visible = true;
    //dataGridView4.DataSource = tb1;
    OleDbDataAdapter ad1 = new OleDbDataAdapter("select * from student2", con);
    DataTable tb2 = new DataTable();
    ad1.Fill(tb2);
    tb2.Merge(tb1);
    dataGridView3.DataSource = tb2;
    dataGridView3.Visible = true;
    dataGridView1.Visible = false;
    dataGridView2.Visible = false;
    label1.Visible = false;
    label2.Visible = false;
    }
    }
    }
    stb.LoadDataRow(new object[] { "3", "Anil" }, true);
    dataGridView1.DataSource = ftb;
    dataGridView2.DataSource = stb;  
    }
    private void button1_Click(object sender, EventArgs e)
    {
    ftb.Merge(stb);
    dataGridView1.DataSource=ftb;
    dataGridView2.Visible = false;  
    label1.Text = "After Merging";
    label2.Visible = false;
    }
    }
    }
    
  4.  

  5. Run thr program
  6. click the merge button
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