具有无效源值的WPF绑定

应用一 Converter 比如下面的绑定就应该做到这一点:

public class TextConverter : IValueConverter
{
    public object Convert(object value, Type targetType,
        object parameter, CultureInfo culture)
    {
        int actual = (int)value;

        return actual.ToString();
    }

    public object ConvertBack(object value, Type targetType,
        object parameter, CultureInfo culture)
    {
        string actual = (string)value;

        int theValue = 0;
        int.TryParse(actual, out theValue);

        return theValue;
    }
}

你的 TextBox 绑定如下所示:

<TextBox Text="{Binding ... Converter={StaticResource convert}}"></TextBox>

将转换器定义为窗口/控件的资源。