一、方案

利用viewmodel之间消息传递方式

二、子页面

1、view.xaml

<Button Content="接谈" Command="{Binding DataContext.JtCommand, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=DataGrid}}" 



                                            Style="{StaticResource ButtonSuccess}" CommandParameter="{Binding Param}" Cursor="Hand"/>

2、viewmodel

        public RelayCommand<string> JtCommand =>



            new Lazy<RelayCommand<string>>(() =>



                new RelayCommand<string>(Jt)).Value;







        private void Jt(string param)




        {



            SendInfo = param;



            //消息传递给PindexModel接收，打开新的页面,第二个参数为消息key，控制接收对象




            Messenger.Default.Send<String>(SendInfo, "AddTab");







        }

三、主窗体页面

1、viewmodel

public PIndexViewModel()



        {



            MenuList = GetMenuList();



            MenuSelectedIndex = 0;



            DataList = GetTabControlDataList();







            //接收其他页面传递的消息,第二个参数为消息key，控制接收对象




            Messenger.Default.Register<String>(this, "AddTab", ReceiveInfo);







            DateShow();



            timer = new DispatcherTimer();



            timer.Interval = TimeSpan.FromSeconds(1);



            timer.Tick += new EventHandler(TimerTick);



            timer.Start();



        }

/// <summary>



        /// 消息处理




        /// </summary>




        /// <param name="msg"></param>




        private void ReceiveInfo(string msg)




        {



            AddTabItem(msg);



        }

2、xaml.cs

public PIndex()



        {



            InitializeComponent();



            //卸载当前(this)对象注册的所有MVVMLight消息




            this.Unloaded += (sender, e) => Messenger.Default.Unregister(this);



        }

WPF MVVM 子页面控制主窗体新增tab页面