How to show a message box in an ASP.NET page?

Question

As I was a Windows programmer it was so easy to show a message box on a form.

But on an ASP.NET page I don\'t know how can I show it?

Actually I have some co

Answer 1

The only way to show a Yes No dialog, is to design a custom one (Javascript confirm can only produce OK and Cancel).

Luckily, ASP.NET Ajax controls (Ajaxcontroltoolkit) makes this job easy, as you can have a panel as your messagebox with the buttons you want, and have a ModalPopupExtender to imitate a dialog.

EDIT:

For what you ask with javascript, you can do it (and it is a much simpler solution than any seen so far), but prepared to only have OK and Cancel as the two possible answers. UI Designer Nightmare ! :(

Basically, have the following two properties in your aspx page for that button or whatever:

onClientClick = "javascript:confirm('you sure you wanna do this?');" onClick="myButton_Click"

onClick will only run if OK is pressed on the msg dialog.