WpfExtensions.Xaml 1.2.0

WpfExtensions.Xaml.Markup

0. *New CommandExtension

• View (XAML):

<Element Command={markup:Command Execute} />
<Element Command={markup:Command ExecuteWithArgumentAsync, CanExecute}
         CommandParameter={Binding Argument} />

• View Model (*.cs):

class ViewModel
{
    public void Execute() {}

    public void ExecuteWithArgument(string arg) {}

    // The `Execute` method supports async, and its default `Can Execute` method will disable the command when it is busy.

    public Task ExecuteAsync() => Task.Completed;

    public Task ExecuteWithArgumentAsync(string arg) => Task.Completed;

    // The `Can Execute` method does not support async.

    public bool CanExecute() => true;

    public bool CanExecuteWithArgument(string arg) => true;
}

1. ComposeExtension

Combine multiple Converters into one pipeline.

<TextBlock Visibility="{Binding DescriptionText, Converter={markup:Compose
                       {StaticResource IsNullOrEmptyOperator},
                       {StaticResource NotConverter},
                       {StaticResource BooleanToVisibilityConverter}}}"
           Text="{Binding DescriptionText}" />

2. IfExtension

Using the Conditional expression in XAML.

<Button Command="{markup:If {Binding BoolProperty},
                            {Binding OkCommand},
                            {Binding CancelCommand}}" />

<UserControl>
    <markup:If Condition="{Binding IsLoading}">
        <markup:If.True>
            <views:LoadingView />
        </markup:If.True>
        <markup:If.False>
            <views:LoadedView />
        </markup:If.False>
    </markup:If>
</UserControl>

3. SwitchExtension

Using the Switch expression in XAML.

<Image Source="{markup:Switch {Binding FileType},
                              {Case {x:Static res:FileType.Music}, {StaticResource MusicIcon}},
                              {Case {x:Static res:FileType.Video}, {StaticResource VideoIcon}},
                              {Case {x:Static res:FileType.Picture}, {StaticResource PictureIcon}},
                              ...
                              {Case {StaticResource UnknownFileIcon}}}" />

<UserControl>
    <Switch To="{Binding SelectedViewName}">
        <Case Label="View1">
            <views:View1 />
        </Case>
        <Case Label="{x:Static res:Views.View2}">
            <views:View2 />
        </Case>
        <Case>
            <views:View404 />
        </Case>
    </Switch>
</UserControl>

4. I18nExtension

Dynamically switch the culture resource without restarting the app.

<TextBlock Text="{markup:I18n {x:Static languages:UiStrings.MainWindow_Title}}" />
<TextBlock Text="{markup:I18nString {x:Static languages:UiStrings.SayHello}, {Binding Username}}" />
<TextBlock Text="{markup:I18nString {x:Static languages:UiStrings.StringFormat},
                                    {Binding Arg0},
                                    {Binding Arg1},
                                    ...,
                                    {Binding Arg15}}" />

5. StylesExtension (In Progress)

<Button Style="{markup:Styles {StaticResource FlatButtonStyle},
                              {StaticResource AnimationStyle},
                              ...}" />