MVVM-Samples/samples/MvvmSampleUwp/Views/ObservableValidatorPage.xaml at d3c2877b5ede66e2a32ae57adab23765a868070e · CommunityToolkit/MVVM-Samples · GitHub

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<Page
    x:Class="MvvmSampleUwp.Views.ObservableValidatorPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:controls="using:MvvmSampleUwp.Controls"
    xmlns:core="using:Microsoft.Xaml.Interactions.Core"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:interactivity="using:Microsoft.Xaml.Interactivity"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:widgets="using:MvvmSampleUwp.Views.Widgets"
    xmlns:mvvmSampleUwp="using:MvvmSampleUwp"
    NavigationCacheMode="Enabled"
    mc:Ignorable="d"
    mvvmSampleUwp:ViewModelLocator.InitViewModel="True">
    <interactivity:Interaction.Behaviors>
        <core:EventTriggerBehavior EventName="Loaded">
            <core:InvokeCommandAction Command="{x:Bind ViewModel.LoadDocsCommand}" CommandParameter="ObservableValidator" />
        </core:EventTriggerBehavior>
    </interactivity:Interaction.Behaviors>

    <ScrollViewer Padding="{StaticResource DocumentationPageContentPadding}" CanContentRenderOutsideBounds="True">
        <StackPanel Spacing="16">
            <controls:DocumentationBlock Text="{x:Bind ViewModel.GetParagraph('ObservableValidator'), Mode=OneWay}" />
            <controls:DocumentationBlock Text="{x:Bind ViewModel.GetParagraph('How it works'), Mode=OneWay}" />
            <controls:DocumentationBlock Text="{x:Bind ViewModel.GetParagraph('Simple property'), Mode=OneWay}" />
            <controls:InteractiveSample xml:space="preserve">
                <controls:InteractiveSample.Content>
                    <widgets:ValidationFormWidget />
                </controls:InteractiveSample.Content>
                <controls:InteractiveSample.XamlCode>
&lt;StackPanel Spacing=&quot;16&quot;&gt;

    &lt;!--  Text forms  --&gt;
    &lt;controls:ValidationTextBox
        HeaderText=&quot;Enter your first:&quot;
        PlaceholderText=&quot;First name&quot;
        PropertyName=&quot;FirstName&quot;
        Text=&quot;{x:Bind ViewModel.FirstName, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}&quot; /&gt;
    &lt;controls:ValidationTextBox
        HeaderText=&quot;Enter your last name:&quot;
        PlaceholderText=&quot;Last name&quot;
        PropertyName=&quot;LastName&quot;
        Text=&quot;{x:Bind ViewModel.LastName, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}&quot; /&gt;
    &lt;controls:ValidationTextBox
        HeaderText=&quot;Enter your email address:&quot;
        PlaceholderText=&quot;Email&quot;
        PropertyName=&quot;Email&quot;
        Text=&quot;{x:Bind ViewModel.Email, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}&quot; /&gt;
    &lt;controls:ValidationTextBox
        HeaderText=&quot;Enter your phone number:&quot;
        PlaceholderText=&quot;Phone number&quot;
        PropertyName=&quot;PhoneNumber&quot;
        Text=&quot;{x:Bind ViewModel.PhoneNumber, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}&quot; /&gt;

    &lt;!--  Submit command  --&gt;
    &lt;Button Command=&quot;{x:Bind ViewModel.SubmitCommand}&quot; Content=&quot;Submit&quot; /&gt;

    &lt;!--  Popups  --&gt;
    &lt;Grid&gt;
        &lt;muxc:InfoBar
            x:Name=&quot;SuccessInfoBar&quot;
            Title=&quot;Success&quot;
            Message=&quot;The form was filled in correctly.&quot;
            Severity=&quot;Success&quot;&gt;
            &lt;interactivity:Interaction.Behaviors&gt;
                &lt;interactions:EventTriggerBehavior EventName=&quot;FormSubmissionCompleted&quot; SourceObject=&quot;{x:Bind ViewModel}&quot;&gt;
                    &lt;interactions:ChangePropertyAction
                        PropertyName=&quot;IsOpen&quot;
                        TargetObject=&quot;{x:Bind SuccessInfoBar}&quot;
                        Value=&quot;True&quot; /&gt;
                    &lt;interactions:ChangePropertyAction
                        PropertyName=&quot;IsOpen&quot;
                        TargetObject=&quot;{x:Bind FailureInfoBar}&quot;
                        Value=&quot;False&quot; /&gt;
                &lt;/interactions:EventTriggerBehavior&gt;
            &lt;/interactivity:Interaction.Behaviors&gt;
        &lt;/muxc:InfoBar&gt;
        &lt;muxc:InfoBar
            x:Name=&quot;FailureInfoBar&quot;
            Title=&quot;Error&quot;
            Message=&quot;The form was filled in with some errors.&quot;
            Severity=&quot;Error&quot;&gt;
            &lt;muxc:InfoBar.ActionButton&gt;
                &lt;Button Command=&quot;{x:Bind ViewModel.ShowErrorsCommand}&quot; Content=&quot;Show errors&quot; /&gt;
            &lt;/muxc:InfoBar.ActionButton&gt;
            &lt;interactivity:Interaction.Behaviors&gt;
                &lt;interactions:EventTriggerBehavior EventName=&quot;FormSubmissionFailed&quot; SourceObject=&quot;{x:Bind ViewModel}&quot;&gt;
                    &lt;interactions:ChangePropertyAction
                        PropertyName=&quot;IsOpen&quot;
                        TargetObject=&quot;{x:Bind SuccessInfoBar}&quot;
                        Value=&quot;False&quot; /&gt;
                    &lt;interactions:ChangePropertyAction
                        PropertyName=&quot;IsOpen&quot;
                        TargetObject=&quot;{x:Bind FailureInfoBar}&quot;
                        Value=&quot;True&quot; /&gt;
                &lt;/interactions:EventTriggerBehavior&gt;
            &lt;/interactivity:Interaction.Behaviors&gt;
        &lt;/muxc:InfoBar&gt;
    &lt;/Grid&gt;
&lt;/StackPanel&gt;
                </controls:InteractiveSample.XamlCode>
                <controls:InteractiveSample.CSharpCode>
public partial class ValidationFormWidgetViewModel : ObservableValidator
{
    private readonly IDialogService DialogService;

    public ValidationFormWidgetViewModel(IDialogService dialogService)
    {
        DialogService = dialogService;
    }

    public event EventHandler? FormSubmissionCompleted;
    public event EventHandler? FormSubmissionFailed;

    [ObservableProperty]
    [Required]
    [MinLength(2)]
    [MaxLength(100)]
    private string? firstName;

    [ObservableProperty]
    [Required]
    [MinLength(2)]
    [MaxLength(100)]
    private string? lastName;

    [ObservableProperty]
    [Required]
    [EmailAddress]
    private string? email;

    [ObservableProperty]
    [Required]
    [Phone]
    private string? phoneNumber;

    [ICommand]
    private void Submit()
    {
        ValidateAllProperties();

        if (HasErrors)
        {
            FormSubmissionFailed?.Invoke(this, EventArgs.Empty);
        }
        else
        {
            FormSubmissionCompleted?.Invoke(this, EventArgs.Empty);
        }
    }

    [ICommand]
    private void ShowErrors()
    {
        string message = string.Join(Environment.NewLine, GetErrors().Select(e =&gt; e.ErrorMessage));

        _ = DialogService.ShowMessageDialogAsync(&quot;Validation errors&quot;, message);
    }
}
                </controls:InteractiveSample.CSharpCode>
            </controls:InteractiveSample>
            <controls:DocumentationBlock Text="{x:Bind ViewModel.GetParagraph('Custom validation methods'), Mode=OneWay}" />
            <controls:DocumentationBlock Text="{x:Bind ViewModel.GetParagraph('Custom validation attributes'), Mode=OneWay}" />
        </StackPanel>
    </ScrollViewer>
</Page>