MARS-feature-on-the-Employees-table-of-the-Northwind-database

ADO Net Database ASP.Net Tutorial


            <%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" 
    Inherits="Default"%>



    MARS




File: Default.aspx.cs
using System;
using System.Data;
using System.Data.Sql;
using System.Data.SqlClient;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class Default : System.Web.UI.Page
{
    protected void Button1_Click(object sender, EventArgs e)
    {
        string connString = "MultipleActiveResultSets=true;SERVER=(local)\\SQLEXPRESS;ATTACHDBFILENAME=|DataDirectory|northwind.mdf;INTEGRATED SECURITY=sspi;USER INSTANCE=false;";
        using (SqlConnection conn = new SqlConnection(connString))
        {
            SqlCommand cmd1 = new SqlCommand("SELECT employeeid, firstname, lastname FROM employees", conn);
            cmd1.Connection.Open();
            SqlDataReader reader = cmd1.ExecuteReader();
      while (reader.Read())
      {
        string firstNameReverted = reader["firstname"].ToString();
        char[] buf = firstNameReverted.ToCharArray();
        Array.Reverse(buf);
        firstNameReverted = new string(buf);
        int id = (int)reader["employeeid"];
        SqlCommand cmd2 = new SqlCommand("UPDATE employees SET firstname=@newFirstName WHERE employeeid=@empID", conn);
        cmd2.Parameters.AddWithValue("@newFirstName", firstNameReverted);
        cmd2.Parameters.AddWithValue("empID", id);
        cmd2.ExecuteNonQuery();
      }
      reader.Close();
      grid.DataSource = cmd1.ExecuteReader(); 
            grid.DataBind();
            cmd1.Connection.Close();
        }
    }
}