session to exchange data from one page to another - asp.net

Question

protected void Page_Load(object sender, EventArgs e)
{
if (Session["namereturn"] != null)
{
MVOH.Text = Session["namereturn"].ToString();
}
protected void NextPage_Click(object sender, EventArgs e1)
{
Session["name"] = Convert.ToInt32(MVOH.Text);
Response.Redirect("~/Solution.aspx");
}
I am having the above code in first page and trying to pass value from textbox (MVOH) to next page. In the next page I have the code below. It works for the first value but it does not work if i want to change the value in first page and pass it to the next page second time..So I think I have to use count for the nextPage Button but I don't know how to use that and I want to display this value to the text box till i close the browser..Its like the checkout system in Ecommerce where you can go back and change your details..
protected void Page_Load(object sender, EventArgs e)
{
if (Session["name"] != null)
{
TextBox1.Text = Session["name"].ToString();
Session["namereturn"] = TextBox1.Text;
}
}
protected void Button_Click(object sender, EventArgs e1)
{
TextBox1.Text = Session["namereturn"].ToString();
Response.Redirect("~/Details.aspx");
}

Answer 1

What you should techinically do:
You should be submitting the information from textbox1 to a postback action related to page1.cshtml then redirect to the action that will render page2.cshtml and pass the textbox1 information
General Example below:
Public ActionResult Page1()
{
return View();
}
[HttpPost]
Public ActionResult Page1(ViewModel model)
{
return RedirectToAction("Page2",new{ textbox1 = model.textbox1});
}
Public ActionResult Page2(string textbox1)
{
var model = new ViewModel;
model.Textbox2 = textbox1;
return View(model);
}
Based on your question this is what you want:
If do not want to carry it back to the server, you could use the sessionStorage or localStorage from html5 to hold said information from page1.cshtml to page2.cshtml
Reference:
http://www.w3schools.com/Html/html5_webstorage.asp