回答編集履歴
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見直しキャンペーン中
answer
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@@ -1,79 +1,79 @@
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結構悩ましいですね（`double`なとこも地味にいじわる^^;
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takapi_csさんの回答が真っ当という気がしますが、手抜きならこんなのもあるかなと。
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コンバータは適当です^^; お好きな実装をどうぞ。
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`KeepTextBoxDisplaySynchronizedWithTextProperty`の影響範囲はよくわかりません（使ったことないので^^;
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```
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<Window
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x:Class="Questions295331.MainWindow"
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xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
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xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
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xmlns:local="clr-namespace:Questions295331"
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Width="800"
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Height="450">
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<StackPanel>
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<TextBox
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x:Name="textBox"
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Width="100"
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Margin="10"
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Text="{Binding ValidateParameter.Value, UpdateSourceTrigger=PropertyChanged}" />
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<Button
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Width="100"
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Command="{Binding ValidCommand}"
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Content="Valid"
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IsEnabled="{Binding (Validation.HasError), Converter={local:InverseBooleanConverter}, ElementName=textBox}" />
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</StackPanel>
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</Window>
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```
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```
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using System;
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using System.ComponentModel.DataAnnotations;
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using System.Diagnostics;
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using System.Globalization;
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using System.Windows;
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using System.Windows.Data;
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using System.Windows.Markup;
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using Reactive.Bindings;
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namespace Questions295331
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{
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public class InverseBooleanConverter : MarkupExtension, IValueConverter
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{
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public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
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=> !(bool)value;
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public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
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=> throw new NotImplementedException();
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public override object ProvideValue(IServiceProvider serviceProvider) => this;
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}
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class MainWindowsViewModel
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{
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[Range(0, 100d)]
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public ReactiveProperty<double> ValidateParameter { get; }
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public ReactiveCommand ValidCommand { get; }
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public MainWindowsViewModel()
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{
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ValidateParameter = new ReactiveProperty<double>()
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.SetValidateAttribute(() => ValidateParameter);
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ValidCommand = new ReactiveCommand()
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.WithSubscribe(() => Debug.WriteLine(ValidateParameter.Value));
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}
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}
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public partial class MainWindow : Window
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{
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public MainWindow()
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{
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FrameworkCompatibilityPreferences.KeepTextBoxDisplaySynchronizedWithTextProperty = false;
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InitializeComponent();
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DataContext = new MainWindowsViewModel();
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}
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}
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}
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1
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+
結構悩ましいですね（`double`なとこも地味にいじわる^^;
|
|
2
|
+
takapi_csさんの回答が真っ当という気がしますが、手抜きならこんなのもあるかなと。
|
|
3
|
+
|
|
4
|
+
コンバータは適当です^^; お好きな実装をどうぞ。
|
|
5
|
+
`KeepTextBoxDisplaySynchronizedWithTextProperty`の影響範囲はよくわかりません（使ったことないので^^;
|
|
6
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+
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7
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+
```xml
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8
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+
<Window
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9
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+
x:Class="Questions295331.MainWindow"
|
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10
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+
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
|
|
11
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+
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
|
|
12
|
+
xmlns:local="clr-namespace:Questions295331"
|
|
13
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+
Width="800"
|
|
14
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+
Height="450">
|
|
15
|
+
<StackPanel>
|
|
16
|
+
<TextBox
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|
17
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+
x:Name="textBox"
|
|
18
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+
Width="100"
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|
19
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+
Margin="10"
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20
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+
Text="{Binding ValidateParameter.Value, UpdateSourceTrigger=PropertyChanged}" />
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21
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+
<Button
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22
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Width="100"
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23
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Command="{Binding ValidCommand}"
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24
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Content="Valid"
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25
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IsEnabled="{Binding (Validation.HasError), Converter={local:InverseBooleanConverter}, ElementName=textBox}" />
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26
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</StackPanel>
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27
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+
</Window>
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28
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+
```
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29
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30
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```cs
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31
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+
using System;
|
|
32
|
+
using System.ComponentModel.DataAnnotations;
|
|
33
|
+
using System.Diagnostics;
|
|
34
|
+
using System.Globalization;
|
|
35
|
+
using System.Windows;
|
|
36
|
+
using System.Windows.Data;
|
|
37
|
+
using System.Windows.Markup;
|
|
38
|
+
using Reactive.Bindings;
|
|
39
|
+
|
|
40
|
+
namespace Questions295331
|
|
41
|
+
{
|
|
42
|
+
public class InverseBooleanConverter : MarkupExtension, IValueConverter
|
|
43
|
+
{
|
|
44
|
+
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
|
|
45
|
+
=> !(bool)value;
|
|
46
|
+
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
|
|
47
|
+
=> throw new NotImplementedException();
|
|
48
|
+
public override object ProvideValue(IServiceProvider serviceProvider) => this;
|
|
49
|
+
}
|
|
50
|
+
|
|
51
|
+
class MainWindowsViewModel
|
|
52
|
+
{
|
|
53
|
+
[Range(0, 100d)]
|
|
54
|
+
public ReactiveProperty<double> ValidateParameter { get; }
|
|
55
|
+
|
|
56
|
+
public ReactiveCommand ValidCommand { get; }
|
|
57
|
+
|
|
58
|
+
public MainWindowsViewModel()
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|
59
|
+
{
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60
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ValidateParameter = new ReactiveProperty<double>()
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61
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.SetValidateAttribute(() => ValidateParameter);
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62
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+
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63
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ValidCommand = new ReactiveCommand()
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64
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.WithSubscribe(() => Debug.WriteLine(ValidateParameter.Value));
|
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65
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+
}
|
|
66
|
+
}
|
|
67
|
+
|
|
68
|
+
public partial class MainWindow : Window
|
|
69
|
+
{
|
|
70
|
+
public MainWindow()
|
|
71
|
+
{
|
|
72
|
+
FrameworkCompatibilityPreferences.KeepTextBoxDisplaySynchronizedWithTextProperty = false;
|
|
73
|
+
|
|
74
|
+
InitializeComponent();
|
|
75
|
+
DataContext = new MainWindowsViewModel();
|
|
76
|
+
}
|
|
77
|
+
}
|
|
78
|
+
}
|
|
79
79
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```
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