[C#/WINUI3/COMMUNITY TOOLKIT/.NET8] RegexStateTrigger 엘리먼트 : Expression/Options/Value 속성을 사용해 정규식 상태에 따라 처리하기

■ RegexStateTrigger 엘리먼트의 Expression/Options/Value 속성을 사용해 정규식 상태에 따라 처리하는 방법을 보여준다.

※ 비주얼 스튜디오에서 TestProject(Unpackaged) 모드로 빌드한다.
※ TestProject.csproj 프로젝트 파일에서 WindowsPackageType 태그를 None으로 추가했다.

▶ MainPage.xaml


<?xml version="1.0" encoding="utf-8"?>
<Page x:Class="TestProject.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:ctw="using:CommunityToolkit.WinUI"
    Background="{ThemeResource ApplicationPageBackgroundThemeBrush}"
    FontFamily="나눔고딕코딩"
    FontSize="16">
    <Grid>
        <VisualStateManager.VisualStateGroups>
            <VisualStateGroup>
                <VisualState x:Name="validEmail">
                    <VisualState.StateTriggers>
                        <ctw:RegexStateTrigger
                            Expression="^[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$"
                            Options="IgnoreCase"
                            Value="{Binding Text, ElementName=emailTextBox, Mode=OneWay}" />
                    </VisualState.StateTriggers>
                    <VisualState.Setters>
                        <Setter Target="emailStatusTextBlock.Text"       Value="This is a valid email"                       />
                        <Setter Target="emailStatusTextBlock.Foreground" Value="{ThemeResource SystemFillColorSuccessBrush}" />
                        <Setter Target="submitButton.IsEnabled"          Value="true"                                        />
                    </VisualState.Setters>
                </VisualState>
            </VisualStateGroup>
        </VisualStateManager.VisualStateGroups>
        <StackPanel
            HorizontalAlignment="Center"
            VerticalAlignment="Center"
            Width="400">
            <TextBox Name="emailTextBox"
                HorizontalAlignment="Stretch"
                Header="Enter an email" />
            <TextBlock Name="emailStatusTextBlock"
                Style="{StaticResource CaptionTextBlockStyle}"
                Margin="0 10 0 20"
                Foreground="{ThemeResource SystemFillColorCriticalBrush}"
                Text="Not a valid email" />
            <Button Name="submitButton"
                Content="Submit"
                IsEnabled="False" />
        </StackPanel>
    </Grid>
</Page>

<?xml version="1.0" encoding="utf-8"?>

<Page x:Class="TestProject.MainPage"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

xmlns:ctw="using:CommunityToolkit.WinUI"

Background="{ThemeResource ApplicationPageBackgroundThemeBrush}"

FontFamily="나눔고딕코딩"

FontSize="16">

<Grid>

<VisualStateManager.VisualStateGroups>

<VisualState.StateTriggers>

<ctw:RegexStateTrigger

Expression="^[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$"

Options="IgnoreCase"

Value="{Binding Text, ElementName=emailTextBox, Mode=OneWay}" />

</VisualState.StateTriggers>

<VisualState.Setters>

</VisualState.Setters>

</VisualState>

</VisualStateGroup>

</VisualStateManager.VisualStateGroups>

<StackPanel

HorizontalAlignment="Center"

VerticalAlignment="Center"

Width="400">

<TextBox Name="emailTextBox"

HorizontalAlignment="Stretch"

Header="Enter an email" />

<TextBlock Name="emailStatusTextBlock"

Style="{StaticResource CaptionTextBlockStyle}"

Margin="0 10 0 20"

Foreground="{ThemeResource SystemFillColorCriticalBrush}"

Text="Not a valid email" />

<Button Name="submitButton"

Content="Submit"

IsEnabled="False" />

</StackPanel>

</Grid>

</Page>

TestProject.zip