WPF Core Hyperlkink Custom Control

[Kevin Marois]

I'm trying to create what I thought would be a simple custom control to implement a hyperlink. This all works in WPF .Net Framework, but in .Net Core I have 2 problems. First, here's the code: XAML

    <Setter Property="Template">

        <Setter.Value>

            <ControlTemplate>

                <Border Background="{TemplateBinding Background}"
                        BorderBrush="{TemplateBinding BorderBrush}"
                        BorderThickness="{TemplateBinding BorderThickness}">

                    <TextBlock>
                        
                        <Hyperlink>
                            
                             <TextBlock Text="{Binding LinkText}"/>
                                
                            <i:Interaction.Triggers>
                                <i:EventTrigger EventName="Click">
                                    <i:InvokeCommandAction Command="{Binding LinkClickedCommand}"/>
                                </i:EventTrigger>
                            </i:Interaction.Triggers>
                            
                        </Hyperlink>
                        
                    </TextBlock>

                </Border>

            </ControlTemplate>

        </Setter.Value>

    </Setter>

Code Behind

using Marois.Framework.Core.Utilities;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;

namespace MaroisHyperlink
{
public class MaroisHyperlink : Control
{
#region Commands
private ICommand? _LinkClickedCommand;
public ICommand LinkClickedCommand
{
get
{
if (_LinkClickedCommand == null)
_LinkClickedCommand = new RelayCommand(LinkClickedExecuted, LinkClickedCanExecute);
return _LinkClickedCommand;
}
}
#endregion

    #region DP LinkText
    public static readonly DependencyProper

[Richard Deeming]

You're binding to a property defined in the code-behind of the control. But the DataContext isn't set anywhere, so it will be inherited from the parent. You'll need to use a TemplateBinding to bind to the control's properties:

<Setter Property="Template">
    <Setter.Value>
        <ControlTemplate>
            <Border Background="{TemplateBinding Background}"
                    BorderBrush="{TemplateBinding BorderBrush}"
                    BorderThickness="{TemplateBinding BorderThickness}">
                <TextBlock>
                    <Hyperlink>
                         <TextBlock Text="{TemplateBinding LinkText}"/>
                         <i:Interaction.Triggers>
                             <i:EventTrigger EventName="Click">
                                 <i:InvokeCommandAction Command="{TemplateBinding LinkClickedCommand}"/>
                             </i:EventTrigger>
                         </i:Interaction.Triggers>
                    </Hyperlink>
                </TextBlock>
            </Border>
        </ControlTemplate>
    </Setter.Value>
</Setter>

The Interaction markup looks correct to me. I can't see any reason for that not to compile, unless the NuGet package reference isn't loading correctly. It may be worth raising an issue on the GitHub project for that library[^].

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"These people looked deep within my soul and assigned me a number based on the order in which I joined." - Homer

[Kevin Marois]

Richard Deeming wrote:

<TextBlock Text="{TemplateBinding LinkText}"/>

This doesn't compile with the error "The member "LinkText" is not recognized or is not accessible." LinkText is a DP I created in the class file.

If it's not broken, fix it until it is. Everything makes sense in someone's mind. Ya can't fix stupid.

[Kevin Marois]

Had to add the RelativeSource:

However that doesn't seem to work in the command (For some reason the command code now compiles):

with

The property 'RelativeSource' was not found in type 'TemplateBindingExtension'.

If it's not broken, fix it until it is. Everything makes sense in someone's mind. Ya can't fix stupid.

[Richard Deeming]

{TemplateBinding x} should be equivalent to {Binding x, RelativeSource={RelativeSource TemplatedParent}}. The error is telling you that you can't set a RelativeSource on a TemplateBinding.

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"These people looked deep within my soul and assigned me a number based on the order in which I joined." - Homer