这看起来像一个有趣的问题 -
为什么是复选框控件的 IsChecked WPF的类型 bool？（或 Nullable< bool> ），我的意思是如何一个复选框控件的值'null'？ /library/system.windows.controls.primitives.togglebutton.ischecked.aspxrel =nofollow noreferrer>文档， IsChecked 属性有三种不同的可能状态：
因此，当 IsChecked 设置为 null 时，将显示不确定状态。这通常表示为阴影或灰色的控件。
This seems to me like a funny question -
Why is the IsChecked property of a checkbox control in WPF of type bool? (or Nullable<bool>), I mean how can a checkbox control have the value of 'null' ?
解决方案According to the documentation, the IsChecked property has three different possible states:
So, when IsChecked is set to null, the check box will show an "indeterminate" state. This is commonly represented as a shaded, or greyed-out, control.
更多推荐
为什么CheckBox.IsChecked属性为Nullable< bool> ;?
发布评论