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<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs"
Inherits="Default"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>MARS</title>
</head>
<body>
<div id="pageContent">
<form id="form1" runat="server">
<asp:Button ID="Button1" runat="server" Text="Go" OnClick="Button1_Click" />
<hr />
<asp:DataGrid ID="grid" runat="server" CellPadding="4" ForeColor="#333333" GridLines="None" >
<FooterStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
<EditItemStyle BackColor="#2461BF" />
<SelectedItemStyle BackColor="#D1DDF1" Font-Bold="True" ForeColor="#333333" />
<PagerStyle BackColor="#2461BF" ForeColor="White" HorizontalAlign="Center" />
<AlternatingItemStyle BackColor="White" />
<ItemStyle BackColor="#EFF3FB" />
<HeaderStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
</asp:DataGrid>
</form>
</div>
</body>
</html>
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();
}
}
}
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