ASP.NET - Events

Event Handlers ensures that code is executed at the right time.

ASP.NET - Event Handlers

This code was explained in the previous chapter:

<%
TimeStamp.Text=now()
%>
<html>
<body bgcolor="yellow">
<center>
<h2>Hello W3Schools!</h2>
<asp:label id="TimeStamp" runat="server" />
</center>
</body>
</html>

How can you know when the code (the render block in red) will be executed?

The answer to that question is: "You don't know"

To make the code more understandable, and to ensure that code will be executed at the right time we have added an Event Handler:

<script runat="server">
  Sub Page_Load(Sender As Object,E As EventArgs)
    TimeStamp.Text=now()
  End Sub
</script>
<html>
<body bgcolor="yellow">
<center>
<h2>Hello W3Schools!</h2>
<asp:label id="TimeStamp" runat="server" />
</center>
</body>
</html>

An Event Handler is a subroutine that executes code for a given event.

The event Page_Load is one of many events that ASP.NET understands. When a page loads, ASP.NET calls the subroutine Page_Load, and executes the code inside it.

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