How to set 'Default Selected Value' for RadComboBox with RadTreeView inside

[Tan]

Hi, Telerik,
I'd used code at this link: http://demos.telerik.com/aspnet-ajax/treeview/examples/functionality/treeviewcombobox/defaultcs.aspx to create a ComboBox with TreeView inside. (Load Category Table from Database)
But I don't know how to set the default selected value for this RadComboBox when page was loaded.

Ex: Something like this:
Dim myRadComboBox As RadComboBox
myRadComboBox.Selectedvalue = "My Node ID"

Thanks for your support.

[Veronica]

Hi Tan Le,

You can select a RadComboBox on client pageLoad function with this code:

function pageLoad() {
            var comboBox = $find("<%= RadComboBox1.ClientID %>");
            var tree = comboBox.get_items().getItem(0).findControl("RadTreeView1");
            var node = tree.findNodeByText("South Africa");
            node.set_selected(true);
            var selectedNode = tree.get_selectedNode();
            if (selectedNode) {
                comboBox.set_text(selectedNode.get_text());
            }
        }

Find the full code in the attached .zip file.

Please let me know if this was helful.

Greetings,
Veronica Milcheva
the Telerik team

[Tan]

Hi., Veronica Milcheva.
Thanks for your support. This code is all my need. But I am using controls dynamic generation form in my code (DotNetNuke Framework), I didn't use drag and drop method instead I generate RadComboBox TreeView in my code behind ,so I couldn't knows the exactly what the name of the RadControl.ClientID and the name of TreeView which inside it.
May be I used this code for Page.ClientScript.RegisterStartupScript to solve my problem.
Is there another ways to do this ?
And I'm waiting your solution.
Thanks again.

P/s: My English is not good, pay compassion to me.

[Veronica]

Hi Tan Le,

Thanks for contacting us again.

You can use the OnClientLoad event of the RadComboBox instead of pageLoad. That way you can get the combo client-side object via the sender parameter. Here's the code:

function clientLoad(sender, args) {
           var comboBox = sender;
           var tree = comboBox.get_items().getItem(0).findControl("RadTreeView1");
           var node = tree.findNodeByText("South Africa");
           node.set_selected(true);
           var selectedNode = tree.get_selectedNode();
           if (selectedNode) {
               comboBox.set_text(selectedNode.get_text());
           }
       }

Please let me know if this was helpful.

Greetings,
Veronica Milcheva
the Telerik team

[Tan]

Ok, thanks you. It work for me.

[ARUN RAJA]

Hello friend,
         i need this function in server side(c#).i can able to set the selected node of tree view in code behind but not able to set the selected node as default dropdown value.

By
arun

[Veronica]

Hi ARUN,

You can set default item of the ComboBox server-side by this code for example:

protected void Page_Load(object sender, EventArgs e)
    {
        RadTreeView tree = (RadTreeView)RadComboBox1.Items[0].FindControl("RadTreeView1");
        var node = tree.FindNodeByText("Canada");
        node.Selected = true;
    }

In my case I have a node in the RadTreeView with text "Canada".

Please let me know if this was helpful.

Greetings,
Veronica Milcheva
the Telerik team

[Karthik Kantharaj]

Hi Veronica Milcheva

I am following your post, i got the selected node in tree but  am not able to place my tree node to combobox
Below is my code on server side

ComboBox cbx = (ComboBox)control.FindControl("RadComboBox1");
            RadTreeView objTree1 = (RadTreeView)cbx.Items[0].FindControl("RadTreeView1");
            RadTreeNode nodeValue = objTree1.FindNodeByValue(id.ToString());
            nodeValue.Selected = true;

What i need to do after this
/*
            bool selectedNode = nodeValue.Selected;
            if(selectedNode)
            {
                cbx.SelectedValue = nodeValue.Value;
            }

*/

Please guide me

Karthik.K

[Veronica]

Hi Karthik Kantharaj

Please note that by selecting the RadTreeNode in the Page_Load event (the same code as in my previous post) - this will be enough to view this selected node in the input of the comobobox.

Please let me know if I am missing something in your requirement?

Kind regards,
Veronica Milcheva
the Telerik team

[Karthik Kantharaj]

Hi Veronica Milcheva

Thank you

ComboBox cbx = (ComboBox)ouSelectors.FindControl("RadComboBox1");
            RadTreeView objTree1 = (RadTreeView)cbx.Items[0].FindControl("RadTreeView1");          
            RadTreeNode nodeText = objTree1.FindNodeByText(org.Name);
            nodeText.Selected = true;
            cbx.Text = nodeText.Text;
is what i added and tested and worked fine

The only difference is that i did no do in page_load i did in button click
This is what i added can you please test because i did on server side

Karthik.K

[Veronica]

Hi Karthik Kantharaj,

Yes, you are absolutely right that on server-side you need to set the Text of the RadComboBox in order to display the selected node in the input field of the RadComboBox. Thank you for this remark and please accept my apologies for misleading you.

Greetings,
Veronica Milcheva
the Telerik team

[Karthik Kantharaj]

Hi Veronica Milcheva

Sorry for delay

Thank you for your support

Karthik.K

[Mehrdad]

hi 

node.Selected = true;

 Node is null 
Plz Help :(