how to go to previous screen
<p>I am using two kinds of buttons, on button takes the user to the next screen. Here I am using a session variable to take the user to the next screen:</p>

<pre><code>protected void Buttondocumentdetails_Click(object sender, EventArgs e)
{
    Session["Narration"] = TextBox2.Text;
    Response.Redirect("~/TJFAQ0001.aspx", false);
}
</code></pre>

<p>This is working properly -- after clicking this button the user is sent to the next screen, which is is "TJFAQ0001.aspx".  On this page I am using button to take the user to the previous screen:</p>

<pre><code>protected void previous_Click(object sender, EventArgs e)
{
    Session["Narration"] =null;
    Response.Redirect("TJFAQOO1.aspx", false);
}
</code></pre>

<p>This is working, but all the data has been cleared.  I want the same data when I click previous button.  How can I do this?</p>
