CODEWITHSUNDEEP
c#asp.net.net
user9623401
user9623401

Reputation:

PreLoad and Load event in asp.net

I'm a beginner in ASP.NET, just a question on page life cycle:

The MSDN doc says: "Raised after the page loads view state for itself and all controls, and after it processes postback data that is included with the Request instance", which means, I can also put the programming logic here

protected void Page_PreLoad(object sender, EventArgs e)
{
   Label1.Text = "Hello World; the time is now " + DateTime.Now.ToString();
}

so why we always do like

protected void Page_Load(object sender, EventArgs e)
{
   Label1.Text = "Hello World; the time is now " + DateTime.Now.ToString();
}

?

Upvotes: 1

Views: 3198

Answers (1)

CoolBots
CoolBots

Reputation: 4869

The Page_Load event handler will properly handle creation of all page controls. Per documentation:

The Page object calls the OnLoad method on the Page object, and then recursively does the same for each child control until the page and all controls are loaded. The Load event of individual controls occurs after the Load event of the page.

Use the OnLoad event method to set properties in controls and to establish database connections.

...which means, based on your example, the Label1.Text may get reset by that control's OnLoad event (depending on the individual control's implementation; I do not know if this is true for Label control, but it would be in compliance with the documentation if that did happen).

Upvotes: 5

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