RadTreeview in RadComboBox

[Wicus]

Hi All...can any1 help...im using a radtreeview in a radcombobox...im bind data from sql to the treeview...my code:

       RadTreeView treeview = ((RadTreeView)Combobox2.FindControl("RadTreeView"));

        foreach (DataRow dr in dtData.Rows)
        {

            RadTreeNode ParentLocationNode = new RadTreeNode();
            ParentLocationNode.Text = (string)dr["Column"];
            ParentLocationNode.Value = Convert.ToString(dr["Column"]);
            treeview.Nodes.Add(ParentLocationNode);
        }

each time i get error: Object reference not set to an instance of an object.

plz help!

[Veselin Vasilev]

Hello Wicus,

You are not getting RadTreeView correctly. Please check this article:
http://www.telerik.com/help/aspnet-ajax/combobox-find-item-in-template.html

I hope this helps.

Kind regards,
Veskoni
the Telerik team

Check out Telerik Trainer, the state of the art learning tool for Telerik products.

[Wicus]

Hi...thnkx for the reply im using this code now:

RadTreeView tree = (RadTreeView)cboLocation.Items[0].FindControl("trvLocations");

but i get this error now:

Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index

Wat am i doing wrong now?

[Veselin Vasilev]

Hello Wicus,

Can you please isolate the problem in a small project and send it to us so we can find easily where the problem is?

Thanks

Sincerely yours,
Veskoni
the Telerik team

Check out Telerik Trainer, the state of the art learning tool for Telerik products.

[Wicus]

Hi unfortunatly i am not able to provide to much code....company descretion...here is were i use the code:

HTML:

                               <telerik:radcombobox id="cboLocation" runat="server" skin="Telerik" Height="17px">
                                        <CollapseAnimation Type="OutQuint" Duration="200"></CollapseAnimation>
                                    <ItemTemplate>
                                        <telerik:RadTreeView ID="trvLocations" runat="server" EnableEmbeddedSkins="False" Height="100%" Width="50%">
                                            <CollapseAnimation Duration="100" Type="OutQuint" />
                                            <ExpandAnimation Duration="100" />
                                        </telerik:RadTreeView>
                                    </ItemTemplate>
                                </telerik:radcombobox>

C#:

        RadTreeView tree = (RadTreeView)cboLocation.Items[0].FindControl("trvLocations");


        foreach (DataRow dr in dtData.Rows)
        {
            RadTreeNode ParentLocationNode = new RadTreeNode();
            ParentLocationNode.Text = (string)dr["Location"];
            ParentLocationNode.Value = Convert.ToString(dr["LocationID"]);
        }

[Veselin Vasilev]

Hello Wicus,

Do you have at least one item in the combobox?
If not, please add one with empty text.

All the best,
Veskoni
the Telerik team

Check out Telerik Trainer, the state of the art learning tool for Telerik products.

[Wicus]

hey...thnx for your help...rlly appretiated....got it now...it works...thnx again!