WPF MVVM 子页面控制主窗体新增tab页面

原文: WPF MVVM 子页面控制主窗体新增tab页面

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);
}