WPF TabControl Page 新增关闭传参刷新

Posted 2021-03-15 lonelyxmas

原文:WPF TabControl Page 新增、关闭、传参、刷新

一、tabcontrol

<TabControl Grid.Row="0" x:Name="tbc_main" ItemsSource="{Binding DataList,Mode=OneWay}" SelectedIndex="{Binding TabSelectedIndex}">
                <TabControl.ItemTemplate>
                    <DataTemplate>
                        <StackPanel Orientation="Horizontal" Margin="0" Height="28">
                            <TextBlock Text="{Binding Header}" Margin="10,7,0,0"/>
                            <Button x:Name="btn_close" Content="×" BorderBrush="Transparent" Width="16" Cursor="Hand" Margin="10,0,0,0"
                                    Background="{x:Null}" Command="{Binding DataContext.CloseTabCommand,ElementName=tbc_main}" CommandParameter="{Binding ElementName=btn_close}"
                                    
                                    Padding="0"  >
                            </Button>
                        </StackPanel>
                    </DataTemplate>
                </TabControl.ItemTemplate>
                <TabControl.ContentTemplate>
                    <DataTemplate>
                        <ContentControl Content="{Binding Content}"></ContentControl>
                    </DataTemplate>
                </TabControl.ContentTemplate>
            </TabControl>

一、新增

/// <summary>
        /// 新增页面命令：传递参数
        /// </summary>
        public RelayCommand<string> AddTabItemCommand =>
            new Lazy<RelayCommand<string>>(() =>
                new RelayCommand<string>(AddTabItem)).Value;
 
        /// <summary>
        /// 添加新页面
        /// </summary>
        /// <param name="param">菜单关联新页面参数</param>
        private void AddTabItem(string param)
        {
            JObject obj = (JObject)JsonConvert.DeserializeObject(param);
            string header = obj["header"].ToString();
            string url = obj["url"].ToString();
            Boolean isNew = true;
            int i = 0;
            for (i = 0; i < DataList.Count; i++)
            {
                if (string.Equals(DataList[i].Header, header))
                {
                    isNew = false;
                    break;
                }
            }
            if (isNew)
            {
                Frame fm = new Frame();
                fm.Source = new Uri(url, UriKind.Relative);
                DataList.Add(new TabControlModel
                {
                    Header = header,
                    Content = fm
                });
                TabSelectedIndex = DataList.ToArray().Length - 1;
            }
            else
            {
                
                TabSelectedIndex = i;
                return;
            }
        }

二、关闭tab

/// <summary>
        /// 关闭tab
        /// </summary>
        public RelayCommand<Button> CloseTabCommand =>
            new Lazy<RelayCommand<Button>>(() =>
                new RelayCommand<Button>(CloseTab)).Value;
 
        public void CloseTab(Button btn)
        {
            TabItem tbc = FindParentTabControl(btn);
            foreach (TabControlModel item in DataList)
            {
                if (item.Equals(tbc.Content))
                {
                    DataList.Remove(item);
                    break;
                }
            }
        }
 
        /// <summary>
        /// 递归找父级TabControl
        /// </summary>
        /// <param name="reference">依赖对象</param>
        /// <returns>TabControl</returns>
        private TabItem FindParentTabControl(DependencyObject reference)
        {
            DependencyObject dObj = VisualTreeHelper.GetParent(reference);
            if (dObj == null)
                return null;
            if (dObj.GetType() == typeof(TabItem))
                return dObj as TabItem;
            else
                return FindParentTabControl(dObj);
        }

三、刷新

viewmodel和ViewModelLocator增加时间参数传递

public PIndexViewModel(string dateTime)
        {
            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();
        }

SimpleIoc.Default.Register(() => new PIndexViewModel(DateTime.Now.ToString("HH:mm:ss")));
 
public PIndexViewModel PIView
        {
            get
            {
                return ServiceLocator.Current.GetInstance<PIndexViewModel>(DateTime.Now.ToString("HH:mm:ss"));
            }
        }

四、传参

WPF程序是客户端程序，也就是说每个用户在自己的机器上启动的WPF程序，这些程序是互相独立的，因此不会出现多个用户同时访问的问题。

表单传值和querystring[]传值的方法是因为ASP.NET背后的HTTP协议是无状态协议，因此需要在不同的页面之间（因为Web服务器不会记住各页面的状态）传递信息。 而WPF程序里面的各个page都是运行在同一个进程空间内，共享同一块内存，所以用Application.Current.Properties就可以了。

private void Jt(string param)
        {
            //给接谈传递页面参数
            Application.Current.Properties["pjt"] = param;
            SendInfo = "{ "header":"测试" , "url":"/Pages/PJt.xaml" }";
            //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");
 
        }

public PJtViewModel(string dateTime)
        {
            string param=(string)Application.Current.Properties["pjt"];
            Model = GetXfInfo(param);
            GetXfjPcCount(Model);
 
            //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, "Xfpc_xtxfsx", ReceiveXfpcXtxfsx);
            Messenger.Default.Register<String>(this, "Xfpc_sqyy", ReceiveXfpcSqyy);
            Messenger.Default.Register<String>(this, "Xfpc_ccxf", ReceiveXfpcCcxf);
 
 
 
            Messenger.Default.Register<string[]>(this, MsgTypes.列表信息控制_Callback, res =>
            {
                switch (res[0])
                { 
                    case "GKXX":
                        Model.Zysshtml = res[1];
                        break;
                }
            });
        }