Question

how to display something one time every hour in asp.net ?

example for show messeage in Begining hour one time only?

i use for asp.net ajax timer control?

---

protected void Timer1_Tick(object sender, EventArgs e)
{
    MessageBoxShow(Session["playsound"].ToString());
    Session["playsound"] = 1;
}

but alway null?

---------------------------
Message from webpage
---------------------------
Object reference not set to an instance of an object.
---------------------------
OK   
---------------------------

Answer 1

You can use the

window.setInterval

method

It calls a function repeatedly, with a fixed time delay between each call to that function.

intervalID = window.setInterval(func, delay[, param1, param2, ...]);

Read more info

window.setInterval