VB.NET Technology

For understanding data controls design form like shown in below picture and take datagrid view control from toolbox. And add new database from solution explorer by choosing new item.

Add namespace

Imports System.Data.SqlClient

Dim con As New SqlConnection("Data Source=.\SQLEXPRESS;AttachDbFilename= 
D:\Documents and Settings\R4R\My Documents\Visual Studio 2008\Projects\
WindowsFormsApplication14\WindowsFormsApplication14\r4r.mdf;Integrated 
Security=True;User Instance=True")

Code for inserting Data in Database

Private Sub Button1_Click(ByVal sender As System.Object, 
ByVal e As System.EventArgs) Handles Button1.Click
        Dim com As New SqlCommand((((("insert into emp_detail values('" 
	+ textBox1.Text & "','") + textBox2.Text & "','") + textBox3.Text & "','")
	 + textBox4.Text & "','") + textBox5.Text & "')", con)
        con.Open()
        com.ExecuteNonQuery()
        con.Close()
    End Sub

Code for viewing the total record in DataGridview by clicking the view button

Private Sub Button4_Click(ByVal sender As System.Object, 
	ByVal e As System.EventArgs) Handles Button4.Click
        Dim com2 As New SqlCommand("select * from emp_detail", con)
        Dim da As New SqlDataAdapter(com2)
        Dim ds As New DataSet()
        con.Open()
        da.Fill(ds, "emp_detail")
        con.Close()
        dataGridView1.DataSource = ds.Tables(0)
    End Sub

Code for Updating the record from dataGrid View.

Private Sub Button2_Click(ByVal sender As System.Object,
 ByVal e As System.EventArgs) Handles Button2.Click
        For Each row As DataGridViewRow In dataGridView1.SelectedRows
            If row.Index <> dataGridView1.Rows.Count Then
                id = dataGridView1.SelectedRows(0).Cells(0).Value.ToString()
                Name = dataGridView1.SelectedRows(0).Cells(1).Value.ToString()
                address = dataGridView1.SelectedRows(0).Cells(2).Value.ToString()
                sal = dataGridView1.SelectedRows(0).Cells(3).Value.ToString()
                cont = dataGridView1.SelectedRows(0).Cells(4).Value.ToString()
                dataGridView1.Rows.RemoveAt(row.Index)
            End If
        Next
        Dim com3 As New SqlCommand("update emp_detail set emp_name='"
	& Name & "',emp_address='" & address & "',emp_sal='" & sal &
	 "',emp_cont='" & cont & "'  where emp_id ='" & id & "'", con)
        con.Open()
        com3.ExecuteNonQuery()
        con.Close()
    End Sub

Code for Deleting the recording from Datagridview control

Private Sub Button3_Click(ByVal sender As System.Object, 
	ByVal e As System.EventArgs) Handles Button3.Click
        For Each row As DataGridViewRow In dataGridView1.SelectedRows
            If row.Index <> dataGridView1.Rows.Count Then
                id = dataGridView1.SelectedRows(0).Cells(0).Value.ToString()
                dataGridView1.Rows.RemoveAt(row.Index)
            End If
        Next
        Dim com3 As New SqlCommand("delete from emp_detail where emp_id ='" & id & "'", con)
        con.Open()
        com3.ExecuteNonQuery()
        con.Close()
    End Sub