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Tuesday, April 24, 2012

Encrypt and Decrypt Data using Asp.net

Here In code base64 Encryption and Decryption in done.

Simple example I am showing you to make understand.

Example.

In .aspx page


<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<br />
<asp:Button ID="btnencrypt" runat="server" Text="Encrypt" /> <asp:Button ID="btndecrypt" runat="server" Text="Decrypt" />

<br />
<asp:Label ID="Lblencrypt" runat="server" ></asp:Label>
<br />
<asp:Label ID="Lbldecrypt" runat="server" ></asp:Label>

For Encryption.

.vb

Protected Sub btnencrypt_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnencrypt.Click

        Dim data As String = TextBox1.Text
        Dim encData_byte As Byte() = New Byte(data.Length - 1) {}
        encData_byte = System.Text.Encoding.UTF8.GetBytes(data)
        Dim encodedData As String =              Convert.ToBase64String(encData_byte)
        Lblencrypt.Text = encodedData.ToString()
    End Sub
.C#

protected void btnencrypt_Click(object sender,System.EventArgs e)
{
string data = TextBox1.Text;
byte[] encData_byte = new byte[data.Length];
encData_byte = System.Text.Encoding.UTF8.GetBytes(data);
string encodedData = Convert.ToBase64String(encData_byte);
Lblencrypt.Text = encodedData.ToString();
}


For Decryption.

.vb
Protected Sub btndecrypt_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btndecrypt.Click
        Dim encoder As New System.Text.UTF8Encoding()
        Dim utf8Decode As System.Text.Decoder = encoder.GetDecoder()

        Dim todecode_byte As Byte() = Convert.FromBase64String(Lblencrypt.Text)
        Dim charCount As Integer = utf8Decode.GetCharCount(todecode_byte, 0, todecode_byte.Length)
        Dim decoded_char As Char() = New Char(charCount - 1) {}
        utf8Decode.GetChars(todecode_byte, 0, todecode_byte.Length, decoded_char, 0)
        Dim result As String = New [String](decoded_char)
        Lbldecrypt.Text = result.ToString()
 End Sub


.C#

protected void btndecrypt_Click(object sender,System.EventArgs e)
{
System.Text.UTF8Encoding encoder = new System.Text.UTF8Encoding();
System.Text.Decoder utf8Decode = encoder.GetDecoder();


byte[] todecode_byte = Convert.FromBase64String(Lblencrypt.Text);
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);
Lbldecrypt.Text = result.ToString();
}


Result


1 comment:

  1. Thanks anish malik bhai ,, you are too good Please tell me ur id i wanna some more efficent help from you

    ReplyDelete