Question

我正在使用一个类“BoolValue”，其中我声明一个bool值并将其转换为Dependency Property（希望我做的正确）现在在xaml中我有一个复选框想根据bool值检查/取消选中。我附上整个代码人员，请帮助。

<StackPanel Height="287" HorizontalAlignment="Left" Margin="78,65,0,0" Name="stackPanel1" VerticalAlignment="Top" Width="309" DataContext="xyz" >
  <CheckBox Content="" Height="71" Name="checkBox1" IsChecked="{Binding Path=IsCkecked, Mode=TwoWay}"/>
</StackPanel>

这是班级

public class BoolValue : INotifyPropertyChanged
    {        
        private bool _isCkecked;

        public bool IsCkecked
        {
            get { return _isCkecked; }
            set
            {
                if (value == _isCkecked)
                    return;

                _isCkecked = value;
                RaisePropertyChanged("IsCkecked");
            }
        }

        public event PropertyChangedEventHandler PropertyChanged;

        protected void RaisePropertyChanged(string property)
        {
            PropertyChangedEventArgs args = new PropertyChangedEventArgs(property);
            var handler = this.PropertyChanged;
            //handler(this, args);
            if (handler != null)
            {
                handler(this, args);
            }
        }       
    }

Answer 1

DataContext的实际StackPanel是多少？看起来你正在寻找属性变化但是在DataContext不同。

提供BoolValue是您的CheckBox的DataContext，下面应该有效：

public class BoolValue : INotifyPropertyChanged
{ 
    private bool isChecked;
        public bool IsChecked
        {
            get { return isChecked; }
            set
            {
                if (isChecked != value)
                {
                    isChecked = value;
                    NotifyPropertyChanged("IsChecked");
                }
            }
        }


    public event PropertyChangedEventHandler PropertyChanged;
        public void NotifyPropertyChanged(String propertyName)
        {
            // take a copy to prevent thread issues
            PropertyChangedEventHandler handler = PropertyChanged;
            if (handler != null)
            {
                handler(this, new PropertyChangedEventArgs(propertyName));
            }
        }
}

XAML：

<CheckBox IsChecked="{Binding IsChecked, Mode=TwoWay}"/>

将UIElement绑定到本地数据

1 个答案: