Encreyption and Decryption of data in ASP.NET.

Q.) How to Encrypt And Decrypt the data in ASP.NET ?

Answer:-

---------------------------------------------------------------------------------------------------------​----------

Write Below Code In Code view of Page (Default.aspx.cs)

------------------------------------------------------------------------

In Design view Take-- 

1. One Label
2. Two Buttons
3. Three TextBoxs

I mensioned the image of the Desging page also in the post..........design ur page like that.....

---------------------------------------------------------------------------------------------------------​-------

---------------------------------------------------------------------------------------------------------​---------

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

public class EncryptionTest

{

    public static string base64Encode(string sData)

    {

        try

        {

            byte[] encData_byte = new byte[sData.Length];

            encData_byte = System.Text.Encoding.UTF8.GetBytes(sData);

            string encodedData = Convert.ToBase64String(encData_byte);

            return encodedData;

        }

        catch (Exception ex)

        {

            throw new Exception("Error in base64Encode" + ex.Message);

        }

    }

    public static string base64Decode(string sData)

    {

        try

        {

            System.Text.UTF8Encoding encoder = new System.Text.UTF8Encoding();

            System.Text.Decoder utf8Decode = encoder.GetDecoder();

            byte[] todecode_byte = Convert.FromBase64String(sData);

            int charCount = utf8Decode.GetCharCount(todecode_byte, 0, todecode_byte.Length);

            char[] decoded_char = new char[charCount];

            utf8Decode.GetChars(todecode_byte, 0, todecode_byte.Length, decoded_char, 0);

            string result = new String(decoded_char);

            return result;

        }

        catch (Exception ex)

        {

            throw new Exception("Error in base64Decode" + ex.Message);

        }

    }

}

public partial class _Default : System.Web.UI.Page

{

    protected void Page_Load(object sender, EventArgs e)

    {

    }

    protected void Button1_Click1(object sender, EventArgs e)

    {

        string val = TextBox1.Text;

        string pass = EncryptionTest.base64Encode(val);

        TextBox2.Text = pass;

        //you can pass this value to database for storing

    }

    protected void Button2_Click(object sender, EventArgs e)

    {

        //from database you can decrypt the value like this

        string str = EncryptionTest.base64Decode(TextBox2.Text);

        TextBox3.Text = str;

    }

}

 --------------------------------------------------------------------------------------------------------​------------

---------------------------------------------------------------------------------------------------------​------------

Thank you.

By:-Rajesh Kumar Sahu