how to encrypt the EMPID

Question

Hi

 

I want when user opens the registration form automatically he should get some value in EmpId field

 

for eg when he opens the registration form on portal to fill that he should get the following

page

 

http://localhost:50605/empid=1122000

 

I want empid in encrypted form in Url and lso want firstle all the feilds should be disabled once the user click edit button then only the user can enter or add the data

 

What changes should be done to the following code ?

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.Sql;
using System.Data.SqlClient;
using System.Data;
using System.Configuration;
public partial class _Default : System.Web.UI.Page
{
SqlCommand cmd = new SqlCommand();
SqlConnection con = new SqlConnection();
protected void Page_Load(object sender, EventArgs e)
{
con.ConnectionString = @"Data Source=SAKSHIKAUL-LT\SQLEXORESS1;Initial Catalog=registrationForm;Integrated Security=True";
con.Open();
{
if (!this.IsPostBack)
Label1.Text = "";
}
}
protected void Button1_Click(object sender, EventArgs e)
{ SqlCommand cmd = new SqlCommand("insert into RegistrationTable" + "(EmpId,Nationality,Religion,Gender,Address,EmailId,Hobbies,MaritalStatus) values (@EmpId,@Nationality,@Religion,@Gender,@Address,@EmailId,@Hobbies,@MaritalStatus)", con);
//string insertQuery = "insert into RegistrationTable(EmpId,Nationality,Religion,Gender,Address,EmailId,Hobbies,Maritalstatus)values (@EmpId,@Nationality,@Religion,@Gender,@Address,@EmailId,@MHobbies,@Maritalstatus)";
cmd.Parameters.AddWithValue("@EmpId", TextBox1.Text);
cmd.Parameters.AddWithValue("@Nationality", TextBox2.Text);
cmd.Parameters.AddWithValue("@Religion", TextBox3.Text);
cmd.Parameters.AddWithValue("@Gender", TextBox4.Text);
cmd.Parameters.AddWithValue("@Address", TextBox5.Text);
cmd.Parameters.AddWithValue("@EmailId", TextBox6.Text);
cmd.Parameters.AddWithValue("@Hobbies", TextBox7.Text);
cmd.Parameters.AddWithValue("@Maritalstatus", TextBox8.Text);
cmd.ExecuteNonQuery();
Label1.Text = "Registered Successfuly";
}
protected void Button2_Click(object sender, EventArgs e)
{
cmd.CommandText = "update RegistrationTable set Nationality =' " + TextBox2.Text + "' where EmpId='" + TextBox1.Text + "' ";
cmd.CommandText = "update RegistrationTable set Religion =' " + TextBox3.Text + "' where EmpId='" + TextBox1.Text + "' ";
cmd.CommandText = "update RegistrationTable set Gender =' " + TextBox4.Text + "' where EmpId='" + TextBox1.Text + "' ";
cmd.CommandText = "update RegistrationTable set Address =' " + TextBox5.Text + "' where EmpId='" + TextBox1.Text + "' ";
cmd.CommandText = "update RegistrationTable set EmailId =' " + TextBox6.Text + "' where EmpId='" + TextBox1.Text + "' ";
cmd.CommandText = "update RegistrationTable set Hobbies =' " + TextBox7.Text + "' where EmpId='" + TextBox1.Text + "' ";
cmd.CommandText = "update RegistrationTable set MaritalStatus =' " + TextBox8.Text + "' where EmpId='" + TextBox1.Text + "' ";
cmd.Connection = con;
cmd.ExecuteNonQuery();
Label1.Text = "Updated Successfuly";
}
protected void Button3_Click(object sender, EventArgs e)
{
TextBox1.Text = "";
TextBox2.Text = ""; //set equal to empty string to all fields
TextBox3.Text = ""; //set equal to empty string to all fields
TextBox4.Text = ""; //set equal to empty string to all fields
TextBox5.Text = ""; //set equal to empty string to all fields
TextBox6.Text = ""; //set equal to empty string to all fields
TextBox7.Text = ""; //set equal to empty string to all fields
TextBox8.Text = ""; //set equal to empty string to all fields
Label1.Text = "Clear All";
}
}