Help with overriding 1

[bjd4jc]

I am having a hard time with understanding something.

I have a base class that is derived from System.Web.UI.Page.
This is an example. It mirros what I am doing but it is not what I am doing.

public class SLBase : System.Web.UI.Page
{
    private string _test;

    protected virtual void Page_Load(object sender, System.EventArgs e)
    {
        _test = "A string";
    }
}

public class MyPage : SLBase
{
    protected override void Page_Load(object sender, System.EventArgs e)
    {
        base.Page_Load(sender, e); //set _test the same way for every page
        //some more page load code here
    }
}

The problem is when it does this it goes through both Page_Load methods two times and I don't understand why. Maybe there is a better way to accomplish what I want to do which is:

Have a base class inherited from System.Web.UI.Page. Declare a few objects here.
Always set these objects (in the Page_Load to the same thing).
Have a multiple pages that inherit the base that will have these objects and have them set from the base class.

Can someone help me understand?

Thanks

Brian

 

[chiph]

Try removing the line of code inside your parent class' method and see what happens.

Chip H.


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[bjd4jc]

If I remove the line

base.Page_Load(sender, e);

from my parent class _test is never set.

 

[bjd4jc]

Okay, I think I've figured it out in a way that it works. I am not sure that it is the "right" way but it works.

I have removed the line that chiph suggested I remove and then I added this to my init routine

this.Page_Load += new System.EventHandler(base.Page_Load);
this.Page_Load += new System.EventHandler(this.Page_Load);

 

[cappmgr]

This is another way you might want to consider.

public class MyBasePage : System.Web.UI.Page
{
	protected string _test;
	public MyBasePage()
	{
	}

	protected override void OnLoad(EventArgs e)
	{
		_test = "A test";    
	// Be sure to call the base class's OnLoad method!
		base.OnLoad(e);
	}
}

public class TestMybasePage : MyBasePage
{
	private void Page_Load(object sender, System.EventArgs e)
	{
		Response.Write(_test);
	}
}

overriding the OnXXX methods does not require adding a delegate and I believe is the preferred way.
Marty

 

[bjd4jc]

Thanks! That's what I was missing. I was overriding the wrong method! It makes a ton more sense now!