Question

I understand the ASP.net Page Life Cycle, I get that when I click a button, it first reloads the page then it executes the code behind for my button. My question is how do I get it so that I can set something before this process happens. I am trying to pass a variable that the button has been clicked, but because of the page life cycle it never receives this. What can I do so that I can determine that this button has been clicked maybe I am over-thinking this, or even under-thinking.

Page Load:

        ImageButton btn = (ImageButton)(Page.FindControl("displayYImgBtn"));
        if (btn != null)
        {
            string state = btn.CommandArgument;
            if (state == "true")
            {
                search();
                btn.CommandArgument = "false";
            }
        }

Button:

    ImageButton btn = (ImageButton)(sender);
    btn.CommandArgument = "true";

Answer 1

You could always inspect the post variables directly. If your submit button was clicked, it will have a value in the Request.Form collection, if it’s not postback or some other control caused postback, it shouldn’t appear.