Silverlight子窗口(ChildWindow)传递参数到父窗口演示

在企业级项目中,子窗口(ChildWindow)是一个常用控件,其展示方式是以弹出窗口来显示信息。 这里我将演示,子窗口传递参数到父窗口的方法。由于我的开发环境都是英文环境,所以部分中文可能显示不正常,请大家见谅。

我们的目的是希望用户在子窗口输入一串文字,然后点击提交后,字符串将被返回显示在父窗口。 

1. 首先创建一个新项目 “SLChildWindow",

2. 然后在新项目中,右键点击添加,添加一个新项目,选择“子窗口”(ChildWindow), 改名为"ChildWindowDemo.xaml",添加完成后,在子窗口中添加一个文本框,名为 txtUserInfo,

 1 <controls:ChildWindow x:Class="SLChildWindow.ChildWindowDemo"
 2            xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
 3            xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
 4            xmlns:controls="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls"
 5            Width="400" Height="300" 
 6            Title="ChildWindowDemo">
 7     <Grid x:Name="LayoutRoot" Margin="2">
 8         <Grid.RowDefinitions>
 9             <RowDefinition />
10             <RowDefinition Height="Auto" />
11         </Grid.RowDefinitions>
12 
13         <TextBox x:Name="txtUserInfor" Grid.Row="0" />
14 
15         <Button x:Name="CancelButton" Content="Cancel" Click="CancelButton_Click" Width="75" Height="23" HorizontalAlignment="Right" Margin="0,12,0,0" Grid.Row="1" />
16         <Button x:Name="OKButton" Content="OK" Click="OKButton_Click" Width="75" Height="23" HorizontalAlignment="Right" Margin="0,12,79,0" Grid.Row="1" />
17     </Grid>
18 </controls:ChildWindow>

3. 在子窗口后台代码中创建一个字符串类型的属性,该属性将用来保存用户输入的字符串,

1 public string TestString{ get; set; }

4. 当前,在子窗口有两个按钮,一个是Ok按钮,一个是Cancel按钮,后台有两个按钮事件OKButton_Click,CancelButton_Click; 在OKButton_Click中将用户输入信息赋值给TestString属性,

 1         private void OKButton_Click(object sender, RoutedEventArgs e)
 2         {
 3             TestString = txtUserInfor.Text;
 4             this.DialogResult = true;
 5         }
 6 
 7         private void CancelButton_Click(object sender, RoutedEventArgs e)
 8         {
 9             this.DialogResult = false;
10         }

6. 在父窗口MainPage.xaml中建立一个子窗口的实例,方便父窗口调用子窗口,

1 private ChildWindowDemo childWindowDemo = new ChildWindowDemo();

7. 在父窗口MainPage.xaml中调用子窗口的OkClicked事件,

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Net;
 5 using System.Windows;
 6 using System.Windows.Controls;
 7 using System.Windows.Documents;
 8 using System.Windows.Input;
 9 using System.Windows.Media;
10 using System.Windows.Media.Animation;
11 using System.Windows.Shapes;
12 
13 namespace SLChildWindow
14 {
15     public partial class MainPage : UserControl
16     {
17         private ChildWindowDemo childWindowDemo = new ChildWindowDemo();
18 
19         public MainPage()
20         {
21             InitializeComponent();
22             childWindowDemo.Closed += new EventHandler(childWindowDemo_Closed);
23         }
24 
25         private void childWindowDemo_Closed(object sender, EventArgs e)
26         {
27             bool? result = childWindowDemo.DialogResult;
28 
29             if (result.HasValue && result.Value)
30             {
31                 tbInfo.Text = childWindowDemo.TestString;
32             }
33         }
34 
35         //private void childWindowDemo_OkClicked(object sender, EventArgs e)
36         //{
37         //    tbInfo.Text = childWindowDemo.TestString;
38         //}
39 
40         private void btPopup_Click(object sender, RoutedEventArgs e)
41         {
42             childWindowDemo.Show();
43         }
44 
45 
46 
47 
48     }
49 }

 文章来源:http://silverlightchina.net/html/tips/2009/1125/261.html

原文地址:https://www.cnblogs.com/qiernonstop/p/3735799.html