How to share a C# Integer variable with JavaScript

Question

I want to share the currentTab variable which exists on the C# server side with JavaScript. Here is my code:

C#:

public         


        

Answer 1

You can write the index from your javascript function, to a hiddenfield, and then read that on postback.

In your code, you check the hiddenfield, if your page is postback. Like so:

protected void Page_Load(object sender, EventArgs e)
    {
        if (Page.IsPostBack)
        {
            currentTab = Int32.Parse(HiddenTabValue.Value);
        }

    }