PersistChildrenAttribute class and collections in design-time prob

[A.J. van der Burg]

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.TabControlDesigner)),
ParseChildren(true, "Tabs"),
PersistChildren(true)]

The collection has the following attributes:
[PersistenceMode(PersistenceMode.InnerDefaultProperty),
MergableProperty(false),
DesignerSerializationVisibility(DesignerSerializationVisibility.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

 

[Nicole Schenk]

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.TabControlDesigner)),
ParseChildren(true, "Tabs"),
PersistChildren(true)]

The collection has the following attributes:
[PersistenceMode(PersistenceMode.InnerDefaultProperty),
MergableProperty(false),
DesignerSerializationVisibility(DesignerSerializationVisibility.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.