How to make HtmlSelect Control with OnChange event to trigger C# code behind function

Question

How should I make \"Html Select Control\" with OnChange event to trigger C# code behind function
like ASP.NET SelectedIndexChanged of the DropDownList C

Answer 1

If I'm getting it right, you need to use another control to trigger the code behind. Just add the button and access the state of the select

    
        A
        B
        C
    
    

Code behind:

    protected void Button1_Click(object sender, EventArgs e)
    {
        int index = xx.SelectedIndex;
    }