WPF TabControl Page 新增、关闭、传参、刷新

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;
}
});
}