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Last Updated: 24 Jun 2025 14:09 by ADMIN
Martin Ivanov
Created on: 23 May 2025 10:31
Category: UI for WPF
Type: Bug Report
2
Licensing: The missing or invalid license dialog and watermark are shown even when a valid license key is installed in an addin project

The dialog and the watermark stating that no license is found are displayed, even when the license key is installed properly. This happens in addin projects, like Excel VSTO Add-in.

To workaround this use the  TelerikLicensing.Register method to install your license script key.

public MyWpfUserControl()
{
    TelerikLicensing.Register("your-script-key");
    InitializeComponent();
}

3 comments
ADMIN
Vladimir Stoyanov
Posted on: 24 Jun 2025 13:55

We will proceed with closing this item as our official recommedation is to invoke the TelerikLicensing.Register method in such scenarios. Since the 1.6.7 version of the Telerik.Licensing NuGet we recommend invoking the Register method without a parameter like so:

public MyWPFUserControl()
    {
        TelerikLicensing.Register();
        InitializeComponent();
    }

You can also find more information in the following article: Telerik License Not Found Dialog Shown When UI for WPF Used in Addin Project.

Regards,
Vladimir Stoyanov
Progress Telerik

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ADMIN
Martin Ivanov
Posted on: 28 May 2025 11:55

Hello Axel,

You can do it once per run of the corresponding addin.

Regards,
Martin Ivanov
Progress Telerik

Love the Telerik and Kendo UI products and believe more people should try them? Invite a fellow developer to become a Progress customer and each of you can get a $50 Amazon gift voucher.

Axel
Posted on: 28 May 2025 11:27
Is it possible to do this License Rgister Call once (per runtime), or is it mandatory to do it in every single User Control/Window which make use of a Telerik WPF Control?
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