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combobox with treeview setting initially selected value

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ComboBox

This is a migrated thread and some comments may be shown as answers.

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;

1 Answer, 1 is accepted

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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