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Hi all,

I have a problem with maintaning the elements of a collection in design
time. I have a custom webcontrol, which in turn has a collection of child
controls. When I use the PersistChildenAttribute class, this collection is
not maintained when viewing the control in design time. In runtime,
everything is OK. Here are some designer settings of the classes involved:

[DefaultProperty("Tabs"),
DefaultEvent("SelectedIndexChanged"),
ToolboxData("<{0}:TabControl runat=server></{0}:TabControl>"),
ToolboxBitmap(typeof(TabControl), "Icons.TabControlIcon.bmp"),
Designer(typeof(TVW.Web.UI.Design.WebControls.TabC ontrolDesigner)),
ParseChildren(true, "Tabs"),
PersistChildren(true)]

The collection has the following attributes:
[PersistenceMode(PersistenceMode.InnerDefaultProper ty),
MergableProperty(false),
DesignerSerializationVisibility(DesignerSerializat ionVisibility.Content)]

If I remove the PersistChildrenAttribute everything works ok in design-time,
but I want to persist the controls created at a lower level (within the
collection), so basically I'm stuck. Does anyone have any ideas?

TIA,

Arnold Jan van der Burg

A.J. van der Burg wrote:

> Hi all,
>
> I have a problem with maintaning the elements of a collection in design
> time. I have a custom webcontrol, which in turn has a collection of child
> controls. When I use the PersistChildenAttribute class, this collection is
> not maintained when viewing the control in design time. In runtime,
> everything is OK. Here are some designer settings of the classes involved:
>
> [DefaultProperty("Tabs"),
> DefaultEvent("SelectedIndexChanged"),
> ToolboxData("<{0}:TabControl runat=server></{0}:TabControl>"),
> ToolboxBitmap(typeof(TabControl), "Icons.TabControlIcon.bmp"),
> Designer(typeof(TVW.Web.UI.Design.WebControls.TabC ontrolDesigner)),
> ParseChildren(true, "Tabs"),
> PersistChildren(true)]
>
> The collection has the following attributes:
> [PersistenceMode(PersistenceMode.InnerDefaultProper ty),
> MergableProperty(false),
> DesignerSerializationVisibility(DesignerSerializat ionVisibility.Content)]
>
> If I remove the PersistChildrenAttribute everything works ok in
> design-time, but I want to persist the controls created at a lower level
> (within the collection), so basically I'm stuck. Does anyone have any
> ideas?
>
> TIA,
>
> Arnold Jan van der Burg
Perhaps you need to write your own support for serialization.