ChangePropertyAction doesn't work with Image and Source property

[sharpordie]

I doesn't update the image source.

<Image Name="image" Source="../Assets/Loading.ico" MaxWidth="24" MaxHeight="24" Margin="4">
    <Interaction.Behaviors>
        <DataTriggerBehavior Binding="{Binding Updated^}" ComparisonCondition="Equal" Value="true">
            <ChangePropertyAction TargetObject="{Binding #image}" PropertyName="Source" Value="../Assets/True.ico" />
        </DataTriggerBehavior>
        <DataTriggerBehavior Binding="{Binding Updated^}" ComparisonCondition="Equal" Value="false">
            <ChangePropertyAction TargetObject="{Binding #image}" PropertyName="Source" Value="../Assets/False.ico" />
        </DataTriggerBehavior>
    </Interaction.Behaviors>
</Image>

But it works when I use text (emoji here).

<Label Name="label" Content="💤" HorizontalContentAlignment="Center" VerticalContentAlignment="Center">
    <Interaction.Behaviors>
        <DataTriggerBehavior Binding="{Binding Updated^}" ComparisonCondition="Equal" Value="true">
            <ChangePropertyAction TargetObject="{Binding #label}" PropertyName="Content" Value="✅" />
        </DataTriggerBehavior>
        <DataTriggerBehavior Binding="{Binding Updated^}" ComparisonCondition="Equal" Value="false">
            <ChangePropertyAction TargetObject="{Binding #label}" PropertyName="Content" Value="🛑" />
        </DataTriggerBehavior>
    </Interaction.Behaviors>
</Label>

[BaculisBirota]

As a temporary solution, i use control inherited from Image:

using Avalonia;
using Avalonia.Controls;
using Avalonia.Media;
using Avalonia.Media.Imaging;
using Avalonia.Platform;
using System;
using System.Reflection;

namespace ProjectNamespace.Controls
{
    public partial class SmartImage : Image
    {
        public static readonly StyledProperty<string> ImagePathProperty = AvaloniaProperty.Register<SmartImage, string>(nameof(ImagePath));
        public string ImagePath
        {
            get { return GetValue(ImagePathProperty); }
            set { SetValue(ImagePathProperty, value); }
        }

        public SmartImage()
        {
            ImagePathProperty.Changed.Subscribe(ImagePathObserver);
        }

        private void ImagePathObserver(AvaloniaPropertyChangedEventArgs args)
        {
            string imagePath = args?.NewValue?.ToString() ?? string.Empty;
            if(imagePath != string.Empty)
                Source = LoadImageFromAssets(imagePath);
            else
                throw new NotSupportedException();
        }

        private static IImage LoadImageFromAssets(string rawUri)
        {
            Uri uri;
            if (rawUri.StartsWith("avares://"))
                uri = new Uri(rawUri);
            else
            {
                string? assemblyName = Assembly.GetExecutingAssembly().GetName().Name;
                if(assemblyName != null)
                    uri = new Uri($"avares://{assemblyName}{rawUri}");
                else
                    throw new NotSupportedException();
            }
            var assets = AvaloniaLocator.Current.GetService<IAssetLoader>();
            var asset = assets.Open(uri);
            long a = asset.Length;
            return new Bitmap(asset);
        }
    }
}

then i write in XAML:

<uc:SmartImage Name="ImgConnStatus" ImagePath="/Assets/disconnected.png">
    <i:Interaction.Behaviors>
        <ia:DataTriggerBehavior Binding="{Binding IsConnect}" ComparisonCondition="Equal" Value="true">
            <ia:ChangePropertyAction TargetObject="{Binding #ImgConnStatus}" PropertyName="ImagePath" Value="/Assets/connected.png"/>
        </ia:DataTriggerBehavior>
        <ia:DataTriggerBehavior Binding="{Binding IsConnect}" ComparisonCondition="Equal" Value="false>
            <ia:ChangePropertyAction TargetObject="{Binding #ImgConnStatus}" PropertyName="ImagePath" Value="/Assets/disconnected.png"/>
	</ia:DataTriggerBehavior>
    </i:Interaction.Behaviors>
</uc:SmartImage>

[maxkatz6]

It's just because Image doesn't work with string, but works with IBitmap

[BaculisBirota]

It's just because Image doesn't work with string, but works with IBitmap

Yes, this is true, but Avalonia uses a converter (BitmapTypeConverter), which allows you to write
<Image Source="/Assets/myImage.png"> in XAML.
The same behavior is expected when using ChangePropertyAction, but it is different, most likely because the converter is not used.

[BaculisBirota]

In file https://github.com/wieslawsoltes/AvaloniaBehaviors/blob/5e800a7f4c6ecdf49952873e04a57f813ce27d6d/src/Avalonia.Xaml.Interactions/Core/TypeConverterHelper.cs#L69-L70 for the type Avalonia.Media.IImage returns a ReferenceConverter and the ConvertFromInvariantString method returns null.