Question

此代码运行良好，但按钮可见性在设计中已折叠。

如何将其设置为可见？

<!--Resources-->
<BooleanToVisibilityConverter x:Key="BoolToVis" />


<Button Visibility="{Binding Converter={StaticResource BoolToVis}, Source={x:Static local:ConfigUser.Prc}}"  Grid.Row="1"/>

Answer 1

如果我做对了你想要的。您需要的是在设计模式下出现的按钮，并且在运行时将布尔值设置为true时也会出现。

您可以创建转换器，测试它是否处于设计模式以及布尔值：

using System;
using System.ComponentModel;
using System.Globalization;
using System.Windows;
using System.Windows.Data;
public class DesignVisibilityConverter : IValueConverter {
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture) {
        if (value is bool) {
            return ((bool) value) || DesignerProperties.GetIsInDesignMode(Application.Current.MainWindow)
                ? Visibility.Visible
                : Visibility.Collapsed;
        }
        return Visibility.Collapsed;
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) {
        throw new NotImplementedException();
    }
}

Answer 2

这个默认为可见。这是我的反向BoolToVis

[ValueConversion(typeof(bool), typeof(Visibility))]
public class InverseBooleanToVisibilityConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        return (value != null && (bool)value) ? 
            Visibility.Collapsed : Visibility.Visible;
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        return (value != null) && ((Visibility)value == Visibility.Collapsed);
    }
}

如何使用BooleanToVisibilityConverter作为默认值可见？

2 个答案: