Design-Time Error is Displayed when Setting the GuidItem Property in XAML

Environment

Product Version	2024.3.806
Product	RadNotifyIcon for WPF

Description

Setting the GuidItem property of the RadNotifyIcon control displays a design-time error.

Solution

The design-time error can come from setting a value to the GuidItem property, which is not of the type of Guid.

To prevent the error from being raised, you can define the value as a resource and use a converter to convert it to a new Guid instance.

The following example showcases this approach:

Defining the Guid value as a resource

XAML

    <Grid>
        <Grid.Resources>
            <local:StringToGuidConverter x:Key="StringToGuidConverter"/>
            <sys:String x:Key="MyGuidString">6e39f786-db66-42ad-987a-628e1bcb3376</sys:String>
        </Grid.Resources>
        <telerik:RadNotifyIcon GuidItem="{Binding Source={StaticResource MyGuidString}, Converter={StaticResource StringToGuidConverter}}"/>
    </Grid>

Implementing the converter

C#

    public class StringToGuidConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            return Guid.Parse(value.ToString());
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }