Merge Case 4: Common Column, with Primary Key

Merge Case 4: Common Column, with Primary Key

In the strongly typed DataSet, Table1 can be used as a sample table that has primary keys

defined on it.

2) create the column with primary key
DataTable ftb = new DataTable();
DataTable stb = new DataTable();
ftb.Columns.Add("Sno", typeof(Int32));
ftb.Columns.Add("Sname", typeof(String));

ftb.PrimaryKey = new DataColumn[] { ftb.Columns["Sno"] };
stb.Columns.Add("Sno", typeof(Int32));
stb.Columns.Add("Smark", typeof(String));

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("Sno", typeof(Int32)); ftb.Columns.Add("Sname", typeof(String)); ftb.PrimaryKey = new DataColumn[] { ftb.Columns["Sno"] }; ftb.LoadDataRow(new object[] { "1", "Ashish" }, true); ftb.LoadDataRow(new object[] { "2", "KAMAL" }, true); stb.Columns.Add("Sno", typeof(Int32)); stb.Columns.Add("Smark", typeof(Int32)); stb.LoadDataRow(new object[] { "1", "480" }, true); stb.LoadDataRow(new object[] { "2", "495" }, 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)Run the program

5)click the merge button