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 }
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