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見直しキャンペーン中

2023/07/17 13:20

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スコア9855

test CHANGED Viewed

@@ -1,425 +1,212 @@
-MVVMにこだわらないのであれば、
+MVVMにこだわらないのであれば、こんな感じでどうでしょうか。
-```xaml
+```xml
 <Window
   x:Class="WpfApp1.SubWindow"
   xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
   xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
   xmlns:local="clr-namespace:WpfApp1"
   Title="SubWindow"
   Width="800"
   Height="450">
   <Window.DataContext>
     <local:SubViewModel />
   </Window.DataContext>
   <Grid>
     <Grid.RowDefinitions>
       <RowDefinition />
       <RowDefinition />
     </Grid.RowDefinitions>
     <TextBox Text="{Binding Text}" />
     <Grid Grid.Row="1">
       <Grid.ColumnDefinitions>
         <ColumnDefinition />
         <ColumnDefinition />
       </Grid.ColumnDefinitions>
       <Button Content="Cancel" IsCancel="True" />
       <Button
         Grid.Column="1"
         Command="{Binding DoSomethingCommand}"
         CommandParameter="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type Window}}}"
         Content="OK"
         IsDefault="True" />
     </Grid>
   </Grid>
 </Window>
-```
+```
-```C#
+```cs
 using System.Windows;
 using Prism.Commands;
 namespace WpfApp1
 {
     public class SubViewModel
     {
         public string Text { get; set; }
         public DelegateCommand<Window> DoSomethingCommand { get; }
         public SubViewModel()
         {
             DoSomethingCommand = new DelegateCommand<Window>((w) =>
             {
                 System.Diagnostics.Debug.WriteLine("DoSomethigCommand");
                 if(string.IsNullOrEmpty(Text))
                 {
                     MessageBox.Show("何か入力してください。");
                 }
                 else
                 {
                     w.DialogResult = true;
                 }
             });
         }
     }
 }
-```
+```
-こんな感じでどうでしょうか。
 ---
-実際には入力値はもっとあってそれぞれ検証したいのであれば`INotifyDataErrorInfo`等を実装し、エラーがあればボタンを押せなくするのがきれいかもしれません。
+実際には入力値はもっとあってそれぞれ検証したいのであれば、`INotifyDataErrorInfo`等を実装しエラーがあればボタンを押せなくするのがきれいかもしれません。
-```xaml
+```xml
 <Window
   x:Class="WpfApp1.SubWindow"
   xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
   xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
   xmlns:ei="http://schemas.microsoft.com/expression/2010/interactions"
   xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"
   xmlns:local="clr-namespace:WpfApp1"
   Name="SubWnd"
   Title="SubWindow"
   Width="800"
   Height="450">
   <Window.Resources>
     <ControlTemplate x:Key="ValidationTemplate">
       <StackPanel>
         <ItemsControl HorizontalAlignment="Right" ItemsSource="{Binding AdornedElement.(Validation.Errors), ElementName=validationTarget}">
           <ItemsControl.ItemTemplate>
             <DataTemplate>
               <TextBlock Foreground="Red" Text="{Binding ErrorContent}" />
             </DataTemplate>
           </ItemsControl.ItemTemplate>
         </ItemsControl>
         <AdornedElementPlaceholder x:Name="validationTarget" />
       </StackPanel>
     </ControlTemplate>
   </Window.Resources>
   <Window.DataContext>
     <local:SubViewModel />
   </Window.DataContext>
   <DockPanel>
     <StackPanel
       HorizontalAlignment="Right"
       DockPanel.Dock="Bottom"
       Orientation="Horizontal">
       <Button
         MinWidth="80"
         Margin="5"
         Command="{Binding DoSomethingCommand}"
         Content="OK">
         <i:Interaction.Triggers>
           <i:EventTrigger EventName="Click">
             <ei:ChangePropertyAction
               PropertyName="DialogResult"
               TargetObject="{Binding ElementName=SubWnd}"
               Value="True" />
           </i:EventTrigger>
         </i:Interaction.Triggers>
       </Button>
       <Button
         MinWidth="80"
         Margin="5"
         Content="Cancel"
         IsCancel="True" />
     </StackPanel>
     <StackPanel>
       <HeaderedContentControl Margin="5" Header="Text1">
         <TextBox Text="{Binding Text1, UpdateSourceTrigger=PropertyChanged}" Validation.ErrorTemplate="{StaticResource ValidationTemplate}" />
       </HeaderedContentControl>
       <HeaderedContentControl Margin="5" Header="Text2">
         <TextBox Text="{Binding Text2, UpdateSourceTrigger=PropertyChanged}" Validation.ErrorTemplate="{StaticResource ValidationTemplate}" />
       </HeaderedContentControl>
       <HeaderedContentControl Margin="5" Header="Text3">
         <TextBox Text="{Binding Text3, UpdateSourceTrigger=PropertyChanged}" Validation.ErrorTemplate="{StaticResource ValidationTemplate}" />
       </HeaderedContentControl>
     </StackPanel>
   </DockPanel>
 </Window>
-```
+```
-```C#
+```cs
 using System;
 using System.Collections;
 using System.Collections.Generic;
 using System.ComponentModel;
 using System.ComponentModel.DataAnnotations;
 using System.Linq;
 using System.Runtime.CompilerServices;
 using Prism.Commands;
 using Prism.Mvvm;
 namespace WpfApp1
 {
     public class SubViewModel : BindableBase, INotifyDataErrorInfo
     {
         [Required(ErrorMessage = "何か入力してください。")]
         public string Text1 { get => _Text1; set => SetProperty(ref _Text1, value); }
         private string _Text1;
         [MinLength(10, ErrorMessage = "10文字以上入力してください。")]
         public string Text2 { get => _Text2; set => SetProperty(ref _Text2, value); }
         private string _Text2;
         [RegularExpression("[a-z]+", ErrorMessage = "a-zの文字列を入力してください。")]
         public string Text3 { get => _Text3; set => SetProperty(ref _Text3, value); }
         private string _Text3;
         public DelegateCommand DoSomethingCommand { get; }
         public SubViewModel()
         {
             errorsContainer = new ErrorsContainer<string>(x => ErrorsChanged?.Invoke(this, new DataErrorsChangedEventArgs(x)));
             Text1 = ""; // ""に深い意味はない。初期値nullから動かしてValidatorを通してるだけ
             Text2 = "";
             Text3 = "A";
             DoSomethingCommand = new DelegateCommand(
                 () => System.Diagnostics.Debug.WriteLine("DoSomethigCommand"),
                 () => !HasErrors)
                 .ObservesProperty(() => HasErrors);
         }
         #region INotifyDataErrorInfo
         private readonly ErrorsContainer<string> errorsContainer;
         public bool HasErrors => errorsContainer.HasErrors;
         public event EventHandler<DataErrorsChangedEventArgs> ErrorsChanged;
         protected override bool SetProperty<T>(ref T storage, T value, [CallerMemberName] string propertyName = null)
         {
             if(!base.SetProperty(ref storage, value, propertyName)) return false;
             var context = new ValidationContext(this) { MemberName = propertyName };
             var errors = new List<ValidationResult>();
             if(!Validator.TryValidateProperty(value, context, errors))
             {
                 errorsContainer.SetErrors(propertyName, errors.Select(x => x.ErrorMessage));
             }
             else
             {
                 errorsContainer.ClearErrors(propertyName);
             }
             RaisePropertyChanged(nameof(HasErrors));
             return true;
         }
         public IEnumerable GetErrors(string propertyName) => errorsContainer.GetErrors(propertyName);
         #endregion
     }
 }
-```
+```