WPF 将复选框绑定到布尔值？
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WPF Bind checkbox to bool?
提问by Jim
I have a WPF checkbox binded to ViewModel nullable boolean property. I am setting this property to false or true in Constructor, to avoid Interminent state but no matter what I do the Initial state of checkbox stays grayed. The binding working just fine since once I change the state by clicking the checkbox on UI I am getting controls values (true/false). Any Ideas?
我有一个绑定到 ViewModel 可为空的布尔属性的 WPF 复选框。我在构造函数中将此属性设置为 false 或 true，以避免出现 Interminent 状态，但无论我做什么，复选框的初始状态都保持灰色。绑定工作得很好，因为一旦我通过单击 UI 上的复选框更改状态，我就会获得控件值（真/假）。有任何想法吗？
XAML:
XAML：
<CheckBox Margin="0,4,0,3"
VerticalAlignment="Center"
Content="Mutual"
IsChecked="{Binding MutualChb}" />
ViewModel:
视图模型：
public ContstrutorViewModel()
{
MutualChb = true;
}
private bool? _mutualChb;
public bool? MutualChb
{
get { return _mutualChb; }
set
{
_mutualChb = value;
_mutualChb = ( _mutualChb != null ) ? value : false;
OnPropertyChanged("MutualChb");
}
}
采纳答案by eran otzap
The reason for that is because it's initially null.
原因是因为它最初是空的。
private bool? _mutualChb;
public bool? MutualChb
{
get { return (_mutualChb != null ) ? _mutualChb : false; }
set
{
_mutualChb = value;
OnPropertyChanged("MutualChb");
}
}
