切换按钮绑定视图模型

Question

嗨，我想将切换按钮与视图模型绑定。下面是视图代码

 <ToggleButton Content="Toggle" Width="80">
                                <i:Interaction.Triggers>
                                    <i:EventTrigger EventName="Checked">
                                        <i:InvokeCommandAction Command="{Binding Path=CheckedCommand}"/>
                                    </i:EventTrigger>
                                    <i:EventTrigger EventName="Unchecked">
                                        <i:InvokeCommandAction Command="{Binding Path=UncheckedCommand}"/>
                                    </i:EventTrigger>
                                </i:Interaction.Triggers>
                            </ToggleButton>

谁能帮我提供相应的视图模型代码？

Answer 1

你在使用棱镜吗？如果没有，您还需要在此类或 BaseViewModel 类中实现 DelegateCommand。

    public class YourViewModel
    {
        private DelegateCommand _checkedCommand;
        public DelegateCommand CheckedCommand
        {
            get
            {
                return _checkedCommand ?? (_checkedCommand = new DelegateCommand(OnCheckedCommand));
            }
        }
        private DelegateCommand _uncheckedCommand;
        public DelegateCommand UncheckedCommand
        {
            get
            {
                return _uncheckedCommand ?? (_uncheckedCommand = new DelegateCommand(OnUncheckedCommand));
            }
        }
        private void OnUncheckedCommand() { }
        private void OnCheckedCommand() { }
    }