Page Event handlers in ASP.net 2.0
In ASP.net 2.0, you can declaratively wire an event to a control by adding an attribute/value to your control. The attribute name is the event name and the attribute value is the method to call. VS 2005 will also create the handler for you as shown below.
<asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />
protected void Button1_Click(object sender, EventArgs e) {
Similarly, since we have a Page_Load event handler in the code behind, I expected to see some kind of declaration in the aspx code but found none.Thankfully, MSDN explains this.
To create a handler for page events
In the code editor, create a method with the name Page_event.
For example, to create a handler for the page's Load event, create a method named Page_Load.
Page event handlers are not required to take parameters the way that other controls event handlers are.
ASP.NET pages automatically bind page events to methods that have the name Page_event. This automatic binding is configured by the AutoEventWireup attribute in the @ Page directive, which is set to true by default. If you set AutoEventWireup to false, the page does not automatically search for methods that use the Page_event naming convention.
http://msdn.microsoft.com/en-us/library/6w2tb12s.aspx
So, if I wanted to handle the Page Init event, I just need to add this and the event gets bound automatically.
protected void Page_Init() {
Trace.Write("I am in init!");
}
Trace.Write("I am in init!");
}