Session State not saving value until third attempt

Question

I am currently trying to learn how to use session state but I have run into a problem that I can't figure out. What I am trying to do is have a button that when I click it, it will increase the value of my variable by 1, but my problem is that the first three times I click it my int does not increase but on the fourth click it works as intended and increases.

This is my code.

private static int Clicks = 1;

protected void Page_Load(object sender, EventArgs e)
{
    // First page load?
    if (!IsPostBack)
    {
        Session["Clicks"] = Clicks; //Clicks
    }

    Label1.Text = Convert.ToString(Session["Clicks"]);
}

protected void btnCounter_Click(object sender, EventArgs e)
{
    //UserClick.BtnClicks++;
    Session["Clicks"] = Clicks++;
}

Answer 1

You should look at the ASP.NET Page Lifecycle (see Postback Event Handling).

That btnCounter click event won't get fired until after the Page_Load event. You will probably have better results if you update the Label within your Click event.

protected void btnCounter_Click(object sender, EventArgs e)
{
    Session["Clicks"] = Clicks++;
    Label1.Text = Session["Clicks"].ToString();
}