Question

I have buttons which each of it holds session. User need to click one of the button, then in the next page user can view the data clicked by them. Here is my code behind:

public partial class Welcome_Proton : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{

}

protected void Button3_Click(object sender, EventArgs e)
{
    Session["carA"] = Label1.Text;
    Response.Redirect("~/Welcome/BookingForm.aspx");
}
protected void Button4_Click(object sender, EventArgs e)
{
    Session["carB"] = Label1.Text;
    Response.Redirect("~/Welcome/BookingForm.aspx");
}
protected void Button5_Click(object sender, EventArgs e)
{
    Session["carC"] = Label1.Text;
    Response.Redirect("~/Welcome/BookingForm.aspx");
}
protected void Button6_Click(object sender, EventArgs e)
{
    Session["carD"] = Label1.Text;
    Response.Redirect("~/Welcome/BookingForm.aspx");
}
protected void Button7_Click(object sender, EventArgs e)
{
    Session["carE"] = Label1.Text;
    Response.Redirect("~/Welcome/BookingForm.aspx");
}
protected void Button8_Click(object sender, EventArgs e)
{
    Session["carF"] = Label1.Text;
    Response.Redirect("~/Welcome/BookingForm.aspx");
}
protected void Button9_Click(object sender, EventArgs e)
{
    Session["carG"] = Label1.Text;
    Response.Redirect("~/Welcome/BookingForm.aspx");
}
protected void Button10_Click(object sender, EventArgs e)
{
    Session["carH"] = Label1.Text;
    Response.Redirect("~/Welcome/BookingForm.aspx");
}
}

To retrieve back the session, I use this code in “BookingForm.aspx” code behind: string car = Session["car"].ToString();
The problem now is, what code should I write in order to retrieve back the session only click by user? How to retrieve only a session click by user? You may ask me if you not clear with my question. Many thanks.

Answer 1

If I understood your question correctly, a quick and dirty solution would be to also save the key into the Session like this:

protected void Button9_Click(object sender, EventArgs e)
{
    Session["carG"] = Label1.Text;
    Session["buttonKey"] = "carG";
}

Once the BookingForm.aspx is loaded you can get the value from session using this code:

private string GetSessionValue()
{
    var key = Sesssion["buttonKey"] as string;
    return Session[key] as string;
}