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Asp.net 2.0 Treeview Control-How to use expand collapse without images

Posted on 2008-10-01
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Last Modified: 2013-11-19
I have a treeview control with one root, 2 parents and several nodes.  The expand collapse is working fine for the menu structure but can I use the control without the +- image or use an empty image?? The html code is below.   Any help would be appreciated, thank-you very much.
<asp:TreeView ID="TreeView2" runat="server" DataSourceID="XmlDataSource3" style="font-size: 10pt; font-family: Arial; position: absolute; left: 455px; top: 118px; width: 280px" NodeIndent="0" Height="81px" Width="197px" EnableViewState="False" MaxDataBindDepth="2" ExpandDepth="2" >
            <DataBindings>
                <asp:TreeNodeBinding DataMember="UWDocs" TextField="text" SelectAction="None"/>
                <asp:TreeNodeBinding DataMember="CertificateOfFacReHeading" TextField="text" ValueField="text" selectAction="Expand"/>
                <asp:TreeNodeBinding DataMember="CertificateofFacReDocList" NavigateUrlField="url"
                    TextField="text" ValueField="text" ImageUrlField="#Value" />
                <asp:TreeNodeBinding DataMember="LapsedCancelledBusMemoHeading" TextField="text"
                    ValueField="text"  SelectAction="Expand"/>
                <asp:TreeNodeBinding DataMember="LapsedCancelledBusinessMemoDocList" NavigateUrlField="url"
                    TextField="text" ValueField="text" />
 </DataBindings>
            <ParentNodeStyle Font-Names="Arial" Font-Size="10pt" Width="280px" />
            <SelectedNodeStyle Font-Names="Arial" Font-Size="10pt" />
            <RootNodeStyle Font-Names="Arial" Font-Size="10pt" ForeColor="Black" cssClass="GeneralRoot"  BackColor="Transparent" Width="300px"/>
            <NodeStyle Font-Names="Arial" Font-Size="10pt"  VerticalPadding="2px" Width="280px" HorizontalPadding="1px" ForeColor="SlateBlue" CssClass="mynode"/>
            <LeafNodeStyle Font-Names="Arial" Font-Size="10pt" /> 
            <HoverNodeStyle BackColor="#EAEAF5"  />
        </asp:TreeView>
        <asp:XmlDataSource ID="XmlDataSource3" runat="server" DataFile="~/Canadian/CanadianXMLTesting/CanadianHomePageUWDocumentsMLFile.xml">
        </asp:XmlDataSource>
       </div>

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Question by:lnshop
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Accepted Solution

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scrathcyboy earned 750 total points
ID: 22620792
For TreeNodes without images, specify the NOIMAGE value for both the ImageIndex and SelectedImageIndex properties. Don't set their ImageKey, SelectedImageKey properties. For the normal nodes, you are free to use indices or keys.

See this link for other caveats in this module --

http://www.codeproject.com/KB/tree/UsingTreenodes.aspx
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by:lnshop
ID: 22635095
Does you solution apply to windows.forms or web forms?  For webforms, I think only way to do this is to either find another image or script the functionality of the treeview.  I will keep looking for an resolution and thank you very much for your help with this.
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Expert Comment

by:scrathcyboy
ID: 22635600
good question -- I think that applies to the web forms more than the windows forms, want me to check further?
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Author Comment

by:lnshop
ID: 22635839
No, but thank you.  I think I will try to find another image.  The xml and treeview navigation works so well without a single line of coding, I want to use it and workaround the image problem.
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