实现对所有WPF TextBoxes的验证

// 定义自定义验证规则
public class NumericValidationRule : ValidationRule
{
    public override ValidationResult Validate(object value, CultureInfo cultureInfo)
    {
        if (value == null || !Regex.IsMatch(value.ToString(), "^[0-9]+$"))
        {
            return new ValidationResult(false, "请输入数字！");
        }
        return ValidationResult.ValidResult;
    }
}

// 创建ViewModel类
public class MyViewModel : INotifyPropertyChanged
{
    private string _text;
    
    public string Text
    {
        get { return _text; }
        set
        {
            _text = value;
            OnPropertyChanged(nameof(Text));
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;

    protected virtual void OnPropertyChanged(string propertyName)
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }
}

// 在XAML中使用绑定和验证器
<Window.DataContext>
    <local:MyViewModel/>
</Window.DataContext>

<Grid>
    <Grid.Resources>
        <local:NumericValidationRule x:Key="NumericValidationRule"/>
        <Style TargetType="TextBox">
            <Setter Property="Validation.ErrorTemplate">
                <Setter.Value>
                    <ControlTemplate>
                        <DockPanel>
                            <Border BorderBrush="Red" BorderThickness="1">
                                <AdornedElementPlaceholder/>
                            </Border>
                            <TextBlock Text="{Binding [0].ErrorContent}" Foreground="Red"/>
                        </DockPanel>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </Grid.Resources>
    <StackPanel>
        <TextBox Text="{Binding Text, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True, NotifyOnValidationError=True, ValidatesOnExceptions=True, ValidatesOnNotifyDataErrors=True, NotifyOnSourceUpdated=True, NotifyOnTargetUpdated=True}" 
                 Validation.ErrorTemplate="{StaticResource ValidationTemplate}"
                 ValidationRules="{StaticResource NumericValidationRule}"/>
        <!-- 其他TextBox -->
    </StackPanel>
</Grid>