When are declared values bound to properties of a user control in WebForms?

When are declared values bound to properties of a user control in WebForms?

I have a user control which has a public property which is an enum type. In my aspx page I'm setting it's value declaratively. In the ascx I'm outputting the value to the page using <%= %> syntax. The value that is output by the echo syntax is always zero 0. The enum does nopt have a zero value.

My question therefore is, is echo <%= %> syntax evaluated before the declared value is bound to the property?

Example:

public enum Foo
{
    Bar = 1,
    Bahh = 2,
    BlackSheep = 3
}

// MyUserControl.cs
public class MyUserControl : UserControl
{
   public Foo Fizz { get; set; }
}

// MyUserControl.ascx
<a href="foo.aspx?foo=<%= this.Fizz %>">Foo</a>

// MyPage.aspx
<foo:MyUserControl runat="server" ID="foo:MyUserControl1" Fizz="Bar" />
<foo:MyUserControl runat="server" ID="foo:MyUserControl2" Fizz="Bahh" />
<foo:MyUserControl runat="server" ID="foo:MyUserControl3" Fizz="BlackSheep" />

The output is :

<a href="foo.aspx?foo=0">Foo</a>
<a href="foo.aspx?foo=0">Foo</a>
<a href="foo.aspx?foo=0开发者_Go百科">Foo</a>

I'm going to assume that zero is the "unset" value for any enum member and therefore assume that <%= is executed before the value is bound to the property.

Zero is the default value and yes the markup on your usercontrol is evaluated before the declarative setting. You should set the value on the page_init event