How to show + in TreeView

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Harshad - 16 Dec 2004 04:39 GMT

For efficiency reason, I do not want to populate all the nodes with children
of each in a treeview. I will just bring root nodes. How do I show a + sign
without adding children nodes?

The reason I want to do this is that I want to show a + sign so that users
get an indication that there are children under that. When a user expands a
node, it will turn that + to a - sign and show children if there are any.

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Thanks for your help.

Harshad Rathod

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Herfried K. Wagner [MVP] - 16 Dec 2004 07:08 GMT

"Harshad" <Harshad@discussions.microsoft.com> schrieb:

> For efficiency reason, I do not want to populate all the nodes with
> children
[quoted text clipped - 6 lines]
> a
> node, it will turn that + to a - sign and show children if there are any.

Add a dummy child node to each node that has children. When expanding the
node, replace the node with the actual children.

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M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://dotnet.mvps.org/dotnet/faqs/

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Harshad - 16 Dec 2004 13:39 GMT

Thank you.
I guess there is no method/property that will help.

> "Harshad" <Harshad@discussions.microsoft.com> schrieb:
> > For efficiency reason, I do not want to populate all the nodes with
[quoted text clipped - 10 lines]
> Add a dummy child node to each node that has children. When expanding the
> node, replace the node with the actual children.

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Herfried K. Wagner [MVP] - 16 Dec 2004 18:23 GMT

"Harshad" <Harshad@discussions.microsoft.com> schrieb:

> Thank you.
> I guess there is no method/property that will help.

You are right.

Signature

M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://dotnet.mvps.org/dotnet/faqs/

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Roy Soltoff - 21 Dec 2004 21:19 GMT

The Infragistics UltraTreeview control has a Node property to do just that
without going through the mechanics of adding dummy nodes to each node that
could have children. In that control the proprty is:

Node.Override.ShowExpansionIndicator = ShowExpansionIndicator.Always

> Thank you.
> I guess there is no method/property that will help.
[quoted text clipped - 13 lines]
> > Add a dummy child node to each node that has children. When expanding the
> > node, replace the node with the actual children.

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How to show + in TreeView

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