Cannot Find Source for Data Binding with ElementName Reference

Environment

Product Version	2019.3.917
Product	RadWizard for WPF

Description

Cannot find the source of data binding with ElementName reference when the elements are in the RadWizardPage's Content.

The following code snippet shows the setup that reproduces the issue.

<telerik:WizardPage.Content> 
    <DataTemplate> 
        <StackPanel> 
            <Label Target="{Binding ElementName=txt_Code2}" Content="_code." /> 
            <TextBox Name="txt_Code2" /> 
        </StackPanel> 
    </DataTemplate> 
</telerik:WizardPage.Content> 

Solution

This behavior comes from an optimization in the RadWizard control. To resolve it, you can use ContentTemplate, instead of Content.

<telerik:WizardPage.ContentTemplate> 
    <DataTemplate> 
        <StackPanel> 
            <Label Target="{Binding ElementName=txt_Code2}" Content="code." /> 
            <TextBox Name="txt_Code2" /> 
        </StackPanel> 
    </DataTemplate> 
</telerik:WizardPage.ContentTemplate> 

Or you can use the __x:Reference_ keyword.

<telerik:WizardPage.Content> 
    <StackPanel> 
        <Label Target="{Binding Source={x:Reference txt_Code2}}" Content="_code." /> 
        <TextBox Name="txt_Code2" /> 
    </StackPanel> 
</telerik:WizardPage.Content>