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combobox with treeview setting initially selected value

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ComboBox
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KevinMc
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KevinMc asked on 14 Jul 2008, 07:45 PM
I am trying to set the selected value of the combobox/treeview from a database value. The online example of a treeview in a combobox works great for insert and select operations but if i try to use it in an edit form i can't seem to properly find the treeview in the combobox and set the selected item to the database field. Any examples out there that explain how to do this?

<telerik:RadComboBox ID="comboParent" runat="server">  
                    <CollapseAnimation Type="OutQuint" Duration="200"></CollapseAnimation> 
                    <ItemTemplate> 
                        <div id="divParentProducts">  
                            <telerik:RadTreeView ID="treeParentProducts" runat="server" DataFieldID="ProductID" DataFieldParentID="ParentProductID" 
                                DataSourceID="sqlProducts" DataTextField="ProductName" DataValueField="ProductID" OnClientNodeClicking="productClicking" 
                                Skin="WebBlue">  
                                <CollapseAnimation Type="OutQuint" Duration="100"></CollapseAnimation> 
                                <ExpandAnimation Duration="100"></ExpandAnimation> 
                            </telerik:RadTreeView> 
                        </div> 
                    </ItemTemplate> 
                    <Items> 
                        <telerik:RadComboBoxItem Text="" Value="" /> 
                    </Items> 
                </telerik:RadComboBox> 
 


//Found this in another forum answer what would the "THE _ITEM_VALUE" Be in my scenario  
RadComboBoxItem comboBoxItem = comboParent.FindItemByValue("THE_ITEM_VALUE");  
RadTreeView treeView = (RadTreeView)comboBoxItem.FindControl("treeProductHierarchy");  
TreeNode nodetoSelect = parentProducts.FindNode(selected.ParentProductID.ToString());  
nodetoSelect.Selected = true

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Veselin Vasilev
Telerik team
answered on 15 Jul 2008, 09:18 AM
Hi KevinMc,

Have you tried this:

RadComboBoxItem comboBoxItem = comboParent.FindItemByValue("THE_ITEM_VALUE");     
RadTreeView treeView = (RadTreeView)comboBoxItem.FindControl("treeProductHierarchy");     
TreeNode nodetoSelect = treeView.FindNodeByValue(selected.ParentProductID.ToString());     
nodetoSelect.Selected = true;    
 

Make sure that comboBoxItem is not null (e.g. you need to have a combo item with Value = "The_ITEM_VALUE")

Let us know how it goes.

Sincerely yours,
Veskoni
the Telerik team

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Veselin Vasilev
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