Change button image source WPF

Question

I have a button with a template.

I would like to dynamically change the image source from the code behind.

Here is my code:

<Button Height="48" HorizontalAlignment="Left" Name="playSequence" VerticalAlignment="Top" Width="49" Click="PlaySequenceButton_Click" Grid.Column="1" Margin="10,0,0,0">
    <Button.Template>
        <ControlTemplate>
            <Border HorizontalAlignment="Center" VerticalAlignment="Center" >
                <Image Name="PlayImage" Source="Play.png" Width="45" Height="41" Stretch="Fill"/>
            </Border>
        </ControlTemplate>
   </Button.Template>
</Button>

When I type this code:

PlayImage.Source = new BitmapImage(new Uri(@"Pause.png", UriKind.Relative));

PlayImage is not recognized.

Is there any way to change the button's image source that way?

King King · Accepted Answer · 2014-07-21 13:47:11Z

1

You can try using the FindName method of a FrameworkTemplate:

playSequence.Template.FindName("PlayImage", playSequence)
            .SetValue(Image.SourceProperty, 
                      new BitmapImage(new Uri(@"Pause.png", UriKind.Relative)));

edited Jul 21, 2014 at 13:47

answered Jul 21, 2014 at 13:42

King King

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Clemens · Accepted Answer · 2014-07-21 13:57:16Z

0

You might prefer to set the image by means of the Button's Content property in a Style like this:

<Button ...>
    <Button.Style>
        <Style TargetType="Button">
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="Button">
                        <Border ...>
                            <Image Source="{TemplateBinding Content}"
                                   Width="45" Height="41" Stretch="Fill"/>
                        </Border>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
            <Setter Property="Content">
                <Setter.Value>
                    <BitmapImage UriSource="Play.png"/>
                </Setter.Value>
            </Setter>
        </Style>
    </Button.Style>
</Button>

Now you could simply change the image by setting the Content property:

playSequence.Content = new BitmapImage(new Uri(@"Pause.png", UriKind.Relative));

answered Jul 21, 2014 at 13:57

Clemens

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4 Comments

Idanis Over a year ago

Thanks. That helped. By the way, is there any way to give the button back its click effect?

Clemens Over a year ago

Not sure what you mean by click effect.

Idanis Over a year ago

Before I added the image to the button, the button had a 3D visual behavior when it was clicked. Now the button is static, I can see only the image, even if I click it. There is no indication that the button was clicked. Is there any way to 'restore' that visual effect when I click the button?

Clemens Over a year ago

That is because the default Button Style is a lot more complex than what we have here. See Button Styles and Templates to get an overview and pay special attention to the different Visual States.

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