Hi everyone,

We just released R1 2023 SP2 (version 2023.1.323) where the error is fixed. You should update your projects to apply the fix.

Regards,
Rumen
Progress Telerik

Hello Jochen,

The good news is that a fix is about to be released very soon. 

About the problem you have mentioned, we have made a couple of tests where the Workaround was placed on the MasterPage and we loaded up to 10 UserControls each containing a ComboBox with the Enabled="False" state. The workaround seemed to be working.

If that is not working for you, the cause could be something else. If you'd like, we can investigate that in Support Ticket. We just need the information that will help us replicate the problem and we will track down the cause.

Regards,
Attila Antal
Progress Telerik

Hello Stein,

If you share the details of that scenario, I can test it out and see if the fix is not working or if something else is at fault.

Regards,
Attila Antal
Progress Telerik

Hi Stein,

I have tested and I can confirm that the Fix is working in both cases. When the Combo with Enabled="False" is placed inside RadPanelBar Item, or when the RadPanelBar has the Enabled="False".

Regards,
Attila Antal
Progress Telerik

The Script has been tested and is working even if it's Placed on the MasterPage while the Combo is located elsewhere (Content Page or UserControl).

If it doesn't work for someone, look for JavaScript errors.

Regards,
Attila Antal
Progress Telerik

Hello Sze Huai,

I have updated the description to make the instructions clearer.

Regards,
Attila Antal
Progress Telerik

Hi Marco,

Thank you for reporting the problem.

Unfortunately, with our latest release (2023.1.314) we have introduced a regression for the ComboBox.

Workaround

Until the fix is released, we suggest using the following workaround.

Place this Script on the Page with the ComboBox and it will override the Combo's internal function.

<script>
    // Condition to ensure the Telerik.Web.UI.RadComboBox object is instantiated and is present on the page
    if (Telerik && Telerik.Web && Telerik.Web.UI && Telerik.Web.UI.RadComboBox) {
        // store the original function in a variable
        var originalFunction = Telerik.Web.UI.RadComboBox.prototype.set_enabled;
        // override the original function
        Telerik.Web.UI.RadComboBox.prototype.set_enabled = function (value) {
            // add the override
            if (!this._view) {
                this._view = new Telerik.Web.UI.RadComboBox.ViewFactory.GetView(this);
            }

            // call the original function after the override
            originalFunction.call(this, value);
        }
    }
</script>

Please excuse us for any inconvenience this may have caused!

Regards,
Attila Antal
Progress Telerik