WPF BooleanToVisibilityConverter要转换为隐藏，而不是折叠时假的？ [英] WPF BooleanToVisibilityConverter that converts to Hidden instead of Collapsed when false?

问题描述

有没有一种方法使用现有的WPF BooleanToVisibilityConverter转换器，但有假值转换为隐藏，而不是崩溃了默认值，或应我只是写我自己？我在一个项目中，这是巨大的开销，像这样简单的东西（共享的东西进入一个单独的解决方案，并重建/签/合并的过程是一个过程的一个杂草丛生的变异巨兽），所以我倒是preFER如果我能一个参数仅仅传递给现有的，而不是通过跳箍刚才提到的。

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，它只能转换为可见或折叠，所以你必须写自己的。下面是根据反射转换方法：

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.Hidden);
}

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