WPF BooleanToVisibilityConverter 在 false 时转换为隐藏而不是折叠? [英] WPF BooleanToVisibilityConverter that converts to Hidden instead of Collapsed when false?

问题描述

有没有办法使用现有的 WPF BooleanToVisibilityConverter 转换器，但将 False 值转换为 Hidden 而不是默认的 Collapsed，还是我应该自己编写?我在一个项目中，做这样简单的事情会产生巨大的开销(共享的东西进入一个单独的解决方案，重建/签入/合并过程是一个过度生长的变异过程的庞然大物)，所以我更喜欢如果我可以只将一个参数传递给现有的参数，而不是跳过刚才提到的圈套.

Is there a way to use the existing WPF BooleanToVisibilityConverter converter but have False values convert to Hidden instead of the default Collapsed, or should I just write my own? I'm on a project where it's tremendous overhead to do something simple like this (shared stuff goes into a separate solution, and the rebuild/checkin/merge process is an overgrown mutated behemoth of a process), so I'd prefer if I could just pass a parameter to the existing one than to jump through the hoops just mentioned.

推荐答案

不幸的是，它只能转换为 Visible 或 Collapsed，因此您必须自己编写.这是根据Reflector的Convert方法:

Unfortunately, it only converts to Visible or Collapsed, so you'll have to write your own. Here is the Convert method according to Reflector:

public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
    bool flag = false;
    if (value is bool)
    {
        flag = (bool)value;
    }
    else if (value is bool?)
    {
        bool? nullable = (bool?)value;
        flag = nullable.HasValue ? nullable.Value : false;
    }
    return (flag ? Visibility.Visible : Visibility.Collapsed);
}

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