DELETE Query

DELETE Query
The SQL DELETE Query is used to delete the existing records from a table.Delete Data in Table in Database.WHERE clause with a DELETE query to delete the selected rows, otherwise all the records would be deleted.

library -   using System.Data.SqlClient;

Syntax:
Delete from student(table) where rn = ' " + TextBox1.Text+ " ' ;

1. Design

2.Write code on Button_Click2

Code:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.SqlClient;

public partial class _Default : System.Web.UI.Page
{
    SqlConnection cn;
    SqlCommand cm;
    SqlDataReader dr;
    protected void Page_Load(object sender, EventArgs e)
    {


    }

    protected void Button2_Click(object sender, EventArgs e)

    {

        string cs = @"Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\Database.mdf;Integrated Security=True;User Instance=True";

        cn = new SqlConnection(cs);

        cn.Open();

        string k = "delete from stu where rn='"+TextBox1.Text+"' ";

        cm = new SqlCommand(k,cn);

        cm.ExecuteNonQuery();

    }

}

3. Output: