Question

I checked SO for a solution but I didn’t come to anything useful, they were either unanswered like this orphan link or irrelevant. Now I ask it here:

Is it possible to make validators show their messages on first load of the page?

I have a couple of validators (required, custom, range …) on my page, and I have grouped them. I want the required validation group show their messages on first load (when !page.IsPostBack) so my customer can see what is mandotary and what is not at the first glance.

Answer 1

Following code should work for your requirement.

protected void Page_Load(object sender, EventArgs e)
{
    if (!Page.IsPostBack)
    {
        // for all validators to fire, first time
        Page.Validate();
        // Or Only validators under a specific group will fire
        Page.Validate("ValidationGroupName");
    }

}