WPF MVVC模式实现窗口关闭

最新推荐文章于 2024-08-02 07:57:43 发布

banjiu00

最新推荐文章于 2024-08-02 07:57:43 发布

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文章标签： wpf

本文链接：https://blog.youkuaiyun.com/houhaopi8740/article/details/129623227

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1.添加引用

右键添加引用
在这里插入图片描述

2.在.xml中加上

xmlns:i=“http://schemas.microsoft.com/xaml/behaviors”

<i:Interaction.Triggers>
    <i:EventTrigger EventName="Closing" >
        <i:InvokeCommandAction Command="{Binding CloseCommand}" PassEventArgsToCommand="True"/>
    </i:EventTrigger>
</i:Interaction.Triggers>

3.ViewModel.cs

public RelayCommand<CancelEventArgs> CloseCommand { get; set; }
    public MainWindowViewModel()
    {
     CloseCommand = new RelayCommand<CancelEventArgs>(OnCloseCommand);
    }

    public void OnCloseCommand(CancelEventArgs obj)
    {
        if (obj != null) { obj.Cancel = true; }

        if (CONST_STOP.Equals(StartOrStop))
        {
            System.Windows.MessageBox.Show("服务正在运行中,请停止后再退出!");
            return;
        }

        SampleDialog view = new SampleDialog(true) { Tag = "ProgramExit" };
        view.SetDialogText("是否确定关闭程序？");
        var result = DialogHost.Show(view, "MainDialog", ClosingEventHandler);
    }

    private void ClosingEventHandler(object sender, DialogClosingEventArgs eventArgs)
    {
        DialogHost host = sender as DialogHost;
        SampleDialog control = host.DialogContent as SampleDialog;
        if (control.Tag.ToString().Equals("ProgramExit"))
        {
            if (Convert.ToBoolean(eventArgs.Parameter))
            {
                // 记录当前时间
                IniFileHelper.IniWrite("TimeStamp", "LastClosedTime", DateTime.Now.ToLocalTime().ToString());
                System.Windows.Application.Current.Shutdown();
            }
        }
    }