Custom Control Development 2-control development

First, read the code section.

[Persistencemode (persistencemode. encodedinnerdefaultproperty ),
Policyparentproperty (true)]
Public String text
{
Get {return _ text ;}
Set {_ text = value ;}
}
[Policyparentproperty (true)]
Public String Value
{
Get {return _ value ;}
Set {_ value = value ;}
}

You will find that the value attribute does not mark the persistencemode attribute, so its default attribute is persistencemode. attribute. because we set text as the default attribute, when we set value to innerdefaultproperty, the value is not displayed. The reason is:

 

[Parsechildren (true, "text")]
Public class myitem

The myitem class is marked as the default property.

 

[Parsechildren (true, "items")]
[Controlbuilder (typeof (scriptitembuilder)]
Public class myitemscontrol: webcontrol, inamingcontainer
{
Private myitems _ items;
[Persistencemode (persistencemode. innerdefaultproperty ),
Designerserializationvisibility (designerserializationvisibility. Content)
]
Public myitems items
{
Get
{
If (_ items = NULL)
{
_ Items = new myitems ();
} Return _ items;
}
}

Here I have customized controlbuilder to edit the items set. It can parse and return any type, and the addparsedsubobject mentioned above can only parse controls marked with runat = 'server.

Controlbuilder can parse any tag.

Public class myitemerbuilder: controlbuilder
{
Public override type getchildcontroltype (string tagname, idictionary attribs)
{
If (string. Compare (tagname. tolower (), "myitem", false, cultureinfo. installeduiculture) = 0)
{
Return typeof (myitem );
}
Return NULL;
}
}

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