What's Page __EVENTARGUMENT?

Question

I saw code like this:

if (this.Request["__EVENTARGUMENT"] == "Flag")
   //DoSomthing...

What does __EVENTARGUMENT mean and are there some parameters like it to access?

Kilkenny

Answer 1

It can be set by calls to __doPostBack in the JavaScript on the page.

This article explains it in a bit more detail.

Crowder

In case of dynamic LinkButton Request["__EVENTARGUMENT"] is coming as empty string. #14487233 – Deepen

The second link is broke and redirects to a unrelated website. – Obeded

@user2389345436357: Thanks, removed. (Would remove the answer, given that it's almost link-only now, but I can't as it's accepted.) – Crowder