Custom Control Development-set controls (similar to dropdownlist and ListBox)

I have defined multiple default attributes (myitem, myanotheritem), and want to run normally during the design period, we have to do two things.

1. inherit myitem and myanotheritem from control.

2. Override the addparsedsubobject Method

Protected override void addparsedsubobject (Object OBJ)
{
If (obj is myitem)
{
If (this. _ items = NULL)
{
This. _ items = new myitems ();
} This. _ items. Add (myitem) OBJ );
} If (obj is myanotheritem)
{
If (this. _ anotheritem = NULL)
{
This. _ anotheritem = new myanotheritems ();
} This. _ anotheritem. Add (myanotheritem) OBJ );
}
}

3. Mark the current controlWidgetMethod to parse attributes.

[Parsechildren (false)]
Public class myitemscontrol: webcontrol, inamingcontainer

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