Hi Samuel,
From your description, you're going to develop a custom ListControl that
will contains collection of the ListItem like item objects, and also want
to customize the ListItem so as to add additional properties, correct?
Based on my research, you can consider the following approach for creating
such a custom list control:
**Since ListItem and ListItemCollection classes are sealed that can not be
override and customize, you may need to create two new classes which
duplicate these two classes' code and add your custom codelogic (such as
add additional attributes).
** For the custom ListItem and ListItemCollection type, you can use
reflector to inspect the built-in ListItem and ListItemCollection class.
You can find that the most important thing to do is inherit the
"IStateManager". here is the built-in ListItem class's signature:
==============
public sealed class ListItem : IStateManager, IParserAccessor,
IAttributeAccessor
{
==============
this interface is used for processing viewstate.
** After you've created your custom ListItem and ListItemCollecction types,
you can use them in your ListControl. Here is a custom list control sample
from code project site, you can have a look for reference:
#Custom ComboBox server control for ASP.NET
http://www.codeproject.com/aspnet/CustomComboBox.asp?df=100&forumid=171101&e
xp=0&select=1786106
If there is anything unclear or any other questions on this, please feel
free to post here.
Sincerely,
Steven Cheng
Microsoft MSDN Online Support Lead
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