创建子窗体，子窗体向父窗体传值，父窗体向子窗体传值

先解决父窗体向子窗体传值 ，呵呵，父窗体中创建子窗体时通过构造函数传值。

解决剩余的：

此处我们将使用Silverlight3来创建一个子窗口，我们要达到的目标包括:
   1、子窗口从父窗口中获取信息并显示在子窗口的标题栏
   2、设置当进入子窗口时取得焦点的控件
   3、父窗口获取子窗口的相关信息包括按钮信息和文本输入框信息
实现过程如下：
首先新建项目SLChildWindow，在此项目中加入Silverligth的SLChildWindow控件，加入方式如下图

项目如下图

 

然后建立我们的界面代码和后台代码如下:
一、MainPage.xaml与MainPage.xaml.cs代码如下

MainPage.xaml代码

 

< UserControl x:Class = " SLChildWindow.MainPage "
    xmlns = " http://schemas.microsoft.com/winfx/2006/xaml/presentation "
    xmlns:x = " http://schemas.microsoft.com/winfx/2006/xaml "
    xmlns:d = " http://schemas.microsoft.com/expression/blend/2008 "
    xmlns:mc = " http://schemas.openxmlformats.org/markup-compatibility/2006 "
    mc:Ignorable = " d "
    d:DesignHeight = " 188 "  d:DesignWidth = " 323 "  xmlns:dataInput = " clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Data.Input "  FontSize = " 12 "  FontWeight = " Bold " >
     < Grid x:Name = " LayoutRoot "  Background = " White "  HorizontalAlignment = " Left "  Height = " 300 "  Width = " 400 " >
         < StackPanel HorizontalAlignment = " Left "  VerticalAlignment = " Top "  Margin = " 10 " >
             < Button Content = " 按钮一 "  Click = " Button_Click1 "  Margin = " 10 "  HorizontalAlignment = " Left " />
             < Button Content = " 按钮二 "  Click = " Button_Click2 "  Margin = " 10 "  HorizontalAlignment = " Left " />
             < TextBlock x:Name = " dialogResult "  Text = " 子窗口按下的按钮信息显示 "  Margin = " 10 "  Foreground = " #FF4420E8 "   />
         </ StackPanel >
         < dataInput:Label Height = " 22 "  Margin = " 150,150,96,0 "  Name = " lblReturnTxt "  VerticalAlignment = " Top "  Foreground = " #FFFF2D3E "  Background = " #FFF8F8F8 "   />
         < dataInput:Label Height = " 22 "  HorizontalAlignment = " Left "  Margin = " 20,150,0,0 "  Name = " label1 "  VerticalAlignment = " Top "  Width = " 116 "  Content = " 从子窗口取回的数据: "   />
     </ Grid >
</ UserControl >

 

 

MainPage.xaml.cs代码 

代码

using  System;
using  System.Collections.Generic;
using  System.Linq;
using  System.Net;
using  System.Windows;
using  System.Windows.Controls;
using  System.Windows.Documents;
using  System.Windows.Input;
using  System.Windows.Media;
using  System.Windows.Media.Animation;
using  System.Windows.Shapes;

namespace  SLChildWindow
{
     public   partial   class  MainPage : UserControl
    {
         private  PopupWindow popupWindow;

         public  MainPage()
        {
            InitializeComponent();
            popupWindow  =   new  PopupWindow();
            popupWindow.Closed  +=   new  EventHandler(PopupWindow_Closed);
        }


         private   void  PopupWindow_Closed( object  sender, EventArgs e)
        {
             if  (( bool )popupWindow.DialogResult)
            {
                dialogResult.Text  =   " 用户在子窗口按下的是确定按钮. " ;
                lblReturnTxt.Content  =  popupWindow.txtInput.Text.ToString();
            }
             else
            {
                dialogResult.Text  =   " 用户在子窗口按下的是取消按钮 " ;
            }
        }

         private   void  Button_Click1( object  sender, RoutedEventArgs e)
        {
            popupWindow.Title  =   " 按下按钮一 " ;
            popupWindow.SetMessage( " 你按下的是按钮一. " );
            popupWindow.txtInput.Text  =   "" ;
            popupWindow.Show();
        }

         private   void  Button_Click2( object  sender, RoutedEventArgs e)
        {
            popupWindow.Title  =   " 按下按钮二 " ;
            popupWindow.SetMessage( " 你按下的是按钮二. " );
            popupWindow.txtInput.Text  =   "" ;
            popupWindow.Show();
        }
    }

    }

 

二、PopupWindow.xaml与PopupWindow.xaml.cs代码如下

PopupWindow.xaml代码

 

代码

< controls:ChildWindow x:Class = " SLChildWindow.PopupWindow "
           xmlns = " http://schemas.microsoft.com/winfx/2006/xaml/presentation "
           xmlns:x = " http://schemas.microsoft.com/winfx/2006/xaml "
           xmlns:controls = " clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls "
           Width = " 400 "  Height = " 300 "
           Title = " PopupWindow "  xmlns:dataInput = " clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Data.Input " >
     < Grid x:Name = " LayoutRoot "  Margin = " 2 " >
         < Grid.RowDefinitions >
             < RowDefinition  />
             < RowDefinition Height = " Auto "   />
         </ Grid.RowDefinitions >
         < TextBlock x:Name = " Message "  Text = ""  TextWrapping = " Wrap " />
        
         < Button x:Name = " CancelButton "  Content = " 取消 "  Click = " CancelButton_Click "  Width = " 75 "  Height = " 23 "  HorizontalAlignment = " Right "  Margin = " 0,12,0,0 "  Grid.Row = " 1 "   />
         < Button x:Name = " OKButton "  Content = " 确定 "  Click = " OKButton_Click "  Width = " 75 "  Height = " 23 "  HorizontalAlignment = " Right "  Margin = " 0,12,79,0 "  Grid.Row = " 1 "   />
       
         < dataInput:Label Height = " 20 "  HorizontalAlignment = " Left "  Margin = " 46,48,0,0 "  Name = " label1 "  VerticalAlignment = " Top "  Width = " 100 "  Content = " 请输入文本 "   />
         < TextBox  x:Name = " txtInput "   Height = " 60 "  HorizontalAlignment = " Left "  Margin = " 46,82,0,0 "   VerticalAlignment = " Top "  Width = " 280 "   />
     </ Grid >
</ controls:ChildWindow >

 

 

PopupWindow.xaml.cs代码

 

代码

using  System;
using  System.Collections.Generic;
using  System.Linq;
using  System.Net;
using  System.Windows;
using  System.Windows.Controls;
using  System.Windows.Documents;
using  System.Windows.Input;
using  System.Windows.Media;
using  System.Windows.Media.Animation;
using  System.Windows.Shapes;

namespace  SLChildWindow
{
     public   partial   class  PopupWindow : ChildWindow
    {
         public  PopupWindow()
        {
                  
            InitializeComponent();
             this .Loaded  +=   new  RoutedEventHandler(PopupWindow_Loaded);
        }

         void  PopupWindow_Loaded( object  sender, RoutedEventArgs e)
        {
             this .GotFocus  +=   new  RoutedEventHandler(PopupWindow_GotFocus);    
        }

         void  PopupWindow_GotFocus( object  sender, RoutedEventArgs e)
        {
           txtInput.Focus();
           GotFocus  -=  PopupWindow_GotFocus;
        }

         public   void  SetMessage( string  theMessage)
        {
            Message.Text  =  theMessage;

        }

         private   void  OKButton_Click( object  sender, RoutedEventArgs e)
        {
             this .DialogResult  =   true ;
            
        }

         private   void  CancelButton_Click( object  sender, RoutedEventArgs e)
        {
             this .DialogResult  =   false ;
        }

    }
}

 

运行效果如下: