Wpf refresh the image when the URI source is changed

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I want to update the image when the path is changed
With my test, The image is not updated when the path is changed when I call SetStatus.

What I have tried:

plugin.cs

C#

public enum StatusType
{
    Start, Pause, Stop
}

public class Plugin
{
    private StatusType status_;
    private String imageStatusPath_;

    public Plugin()
    {
        SetStatus(StatusType.Stop);
    }

    public void SetStatus(StatusType status)
    {
        status_ = status;
        if (status == StatusType.Stop)
            imageStatusPath_ = "Resources/Stop_24.png";

        if (status == StatusType.Pause)
            imageStatusPath_ = "Resources/Pause_24.png";

        if (status == StatusType.Start)
            imageStatusPath_ = "Resources/Play_24.png";
    }

    public String ImageStatusPath
    {
        get { return imageStatusPath_; }
    }

Mainview.xaml

C#

<Image Width="24" Height="24" HorizontalAlignment="Left" VerticalAlignment="Top">
 <Image.Source>
  <BitmapImage UriSource="{Binding ImageStatusPath}"/>
 </Image.Source>
</Image>

Posted 5-Apr-16 7:30am

Member 12330910

Updated 5-Apr-16 17:03pm

v3

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Comments

Sergey Alexandrovich Kryukov 5-Apr-16 13:47pm

You don't even try to refresh anything, merely modify a string member, which is not even a property, so what could you possibly expect? You can, say, modify the image source, it will trigger the invalidation.
—SA

2 solutions

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Beginner Luck · Answer 1 · 2016-04-05T17:03:00

Solution 1

You should use databinding which is part of WPF

Learn the basic first before you try the image one
Data Binding in WPF C# - YouTube[^]

WPF Data Binding - Part 1[^]

Posted 5-Apr-16 17:03pm

Beginner Luck

Updated 5-Apr-16 17:04pm

v2

Member 16091538 · Answer 2 · 2023-09-12T23:31:00

The UI doesn´t recognize the changes of the Imagestatuspath because of following reasons:

1 UI elements only can regcognize changes of properties in bindings when their class implement INotifyPropertyChanged

2 When you implement INotifyPropertyChanged you have to use a setter for the property following the INotifyPropertyChanged pattern to propagate a change

I know i am late but maybe my answer helps some people with the same issue.