Tuesday, 3 January 2012

Dispalying Pasword as Encrypted and Decrypted Format in GridView

Source Code Design


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

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">



<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<table align="center">
<tr>
<td colspan="2">
<b>Encryption and Decryption of Password</b>
</td>
</tr>
<tr>
<td>
UserName
</td>
<td>
<asp:TextBox ID="txtname" runat="server"></asp:TextBox>
</td>
</tr>
<tr>
<td>
Password
</td>
<td>
<asp:TextBox ID="txtPassword" runat="server" TextMode="Password"></asp:TextBox>
</td>
</tr>
<tr>
<td>
FirstName
</td>
<td>
<asp:TextBox ID="txtfname" runat="server"></asp:TextBox>
</td>
</tr>
<tr>
<td>
LastName
</td>
<td>
<asp:TextBox ID="txtlname" runat="server"></asp:TextBox>
</td>
</tr>
<tr>
<td>
</td>
<td>
<asp:Button ID="btnSubmit" runat="server" Text="Submit"
onclick="btnSubmit_Click" />
</td>
</tr>
</table>
</div>
<div>
<table align="center">
<tr>
<td>
<b>Encryption of Password Details</b>
</td>
</tr>
<tr>
<td>
<asp:GridView ID="gvUsers" runat="server" CellPadding="4" BackColor="White"
BorderColor="#CC9966" BorderStyle="None" BorderWidth="1px">
<RowStyle BackColor="White" ForeColor="#330099" />
<FooterStyle BackColor="#FFFFCC" ForeColor="#330099" />
<PagerStyle BackColor="#FFFFCC" ForeColor="#330099" HorizontalAlign="Center" />
<SelectedRowStyle BackColor="#FFCC66" Font-Bold="True" ForeColor="#663399" />
<HeaderStyle BackColor="#990000" Font-Bold="True" ForeColor="#FFFFCC"
HorizontalAlign="Left"/>
</asp:GridView>
</td>
</tr>
</table>
</div>
<div>
<table align="center">
<tr>
<td>
<b>Decryption of Password Details</b>
</td>
</tr>
<tr>
<td>
<asp:GridView ID="gvdecryption" runat="server" BackColor="White"
BorderColor="#CC9966" BorderStyle="None" BorderWidth="1px" CellPadding="4"
onrowdatabound="gvdecryption_RowDataBound">
<RowStyle BackColor="White" ForeColor="#330099" />
<FooterStyle BackColor="#FFFFCC" ForeColor="#330099" />
<PagerStyle BackColor="#FFFFCC" ForeColor="#330099" HorizontalAlign="Center" />
<SelectedRowStyle BackColor="#FFCC66" Font-Bold="True" ForeColor="#663399" />
<HeaderStyle BackColor="#990000" Font-Bold="True" ForeColor="#FFFFCC" />
</asp:GridView>
</td>
</tr>
</table>
</div>
</form>
</body>
</html>

C# Coding

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

public partial class Encriptedformatpassword : System.Web.UI.Page
{
    private const string strconneciton = "data source=LiNKU1;Database=satyabrata;uid=sa;pwd=satyaabcd";
    SqlConnection con = new SqlConnection(strconneciton);
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            BindencryptedData();
            BindDecryptedData();
        }
    }
    protected void btnSubmit_Click(object sender, EventArgs e)
    {
        string strpassword = Encryptdata(txtPassword.Text);
        con.Open();
        SqlCommand cmd = new SqlCommand("insert into SampleUserdetails(UserName,Password,FirstName,LastName) values('" + txtname.Text + "','" + strpassword + "','" + txtfname.Text + "','" + txtlname.Text + "')", con);
        cmd.ExecuteNonQuery();
        con.Close();
        BindencryptedData();
        BindDecryptedData();
    }
    protected void BindencryptedData()
    {
        con.Open();
        SqlCommand cmd = new SqlCommand("select * from SampleUserdetails", con);
        SqlDataAdapter da = new SqlDataAdapter(cmd);
        DataSet ds = new DataSet();
        da.Fill(ds);
        gvUsers.DataSource = ds;
        gvUsers.DataBind();
        con.Close();
    }
   
    protected void BindDecryptedData()
    {
        con.Open();
        SqlCommand cmd = new SqlCommand("select * from SampleUserdetails", con);
        SqlDataAdapter da = new SqlDataAdapter(cmd);
        DataSet ds = new DataSet();
        da.Fill(ds);
        gvdecryption.DataSource = ds;
        gvdecryption.DataBind();
        con.Close();
    }
   
    private string Encryptdata(string password)
    {
        string strmsg = string.Empty;
        byte[] encode = new byte[password.Length];
        encode = Encoding.UTF8.GetBytes(password);
        strmsg = Convert.ToBase64String(encode);
        return strmsg;
    }
   
    private string Decryptdata(string encryptpwd)
    {
        string decryptpwd = string.Empty;
        UTF8Encoding encodepwd = new UTF8Encoding();
        Decoder Decode = encodepwd.GetDecoder();
        byte[] todecode_byte = Convert.FromBase64String(encryptpwd);
        int charCount = Decode.GetCharCount(todecode_byte, 0, todecode_byte.Length);
        char[] decoded_char = new char[charCount];
        Decode.GetChars(todecode_byte, 0, todecode_byte.Length, decoded_char, 0);
        decryptpwd = new String(decoded_char);
        return decryptpwd;
    }
   
    protected void gvdecryption_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            string decryptpassword = e.Row.Cells[1].Text;
            e.Row.Cells[1].Text = Decryptdata(decryptpassword);
        }
    }
}
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