Enable RadComboBox client-side

[Ciupaz]

Hello,

I have 2 RadComboBox with multi checkboxes. The first Is enabled and the second no.

How can I write a JavaScript function the enable the second RadComboBox when the user select at least one checkbox in the first combobox?

Thank you in advance.

Luis

[Ciupaz]

I have tried in this way: 

<telerik:RadComboBox ID="cmbFormat"
                EmptyMessage="Format"
                MarkFirstMatch="true" Width="100%" runat="server" CheckBoxes="true"
                DataTextField="Descrizione" AutoPostBack ="true" EnableCheckAllItemsCheckBox ="true"
                DataValueField="Codice"
                OnClientItemChecking="enable" >
</telerik:RadComboBox>

 

<script type="text/javascript">
    function enable() {
      document.getElementById("cmbPositions").enabled = true;
    }
</script>

 

where cmbPositions is another RadComboBox set disable in the Page_Load (in If Not IsPostBack).

But is does not work, and the RadComboBox remain disabled. 

Any idea?

 

[Peter Milchev]

Hello Luis,

I would recommend checking the Getting Started section of our documentation where the client-side events convention and client-side API of the controls is explained:

• https://docs.telerik.com/devtools/aspnet-ajax/getting-started/customize-control-behavior#client-side-event-handling

Here is also the ComboBox related documentation:

• https://docs.telerik.com/devtools/aspnet-ajax/controls/combobox/client-side-programming/objects/radcombobox-object
• https://docs.telerik.com/devtools/aspnet-ajax/controls/combobox/client-side-programming/events/onclientitemchecking

As for obtaining the client-side object of Telerik controls, I recommend reviewing the following article:

• https://docs.telerik.com/devtools/aspnet-ajax/general-information/get-client-side-reference
  

function enable(sender, args) {
    var positionsComboBox = $find("<%= cmbPositions.ClientID %>");
    positionsComboBox.set_enabled(true);
}

Regards,
Peter Milchev
Progress Telerik