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 >
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
string
testString;
2
3 public string TestString
4
5 {
6
7 get {return testString;}
8
9 set { testString = value; }
10
11 }
12
2
3 public string TestString
4
5 {
6
7 get {return testString;}
8
9 set { testString = value; }
10
11 }
12
4. 在子窗口中,建立一个EventHandler,父窗口将用该事件控制器获取子窗口参数,
1
public
event
EventHandler OkClicked;
5. 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中调用前面我们定义的时间控制器OkClicked,
1
private
void
OKButton_Click(
object
sender, RoutedEventArgs e)
2 {
3 if (OkClicked != null)
4 {
5 TestString = txtUserInfor.Text;
6 OkClicked(this, new EventArgs());
7 }
8 this.DialogResult = true;
9 }
2 {
3 if (OkClicked != null)
4 {
5 TestString = txtUserInfor.Text;
6 OkClicked(this, new EventArgs());
7 }
8 this.DialogResult = true;
9 }
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,
private
ChildWindowDemo childWindowDemo
=
new
ChildWindowDemo();
7. 在父窗口MainPage.xaml中调用子窗口的OkClicked事件,
1
public
MainPage()
2 {
3 InitializeComponent();
4 childWindowDemo.OkClicked += new EventHandler(childWindowDemo_OkClicked);
5 }
6
7 private void childWindowDemo_OkClicked( object sender, EventArgs e)
8 {
9 tbInfo.Text = childWindowDemo.TestString;
10 }
11
12 private void btPopup_Click( object sender, RoutedEventArgs e)
13 {
14 childWindowDemo.Show();
15 }
16
2 {
3 InitializeComponent();
4 childWindowDemo.OkClicked += new EventHandler(childWindowDemo_OkClicked);
5 }
6
7 private void childWindowDemo_OkClicked( object sender, EventArgs e)
8 {
9 tbInfo.Text = childWindowDemo.TestString;
10 }
11
12 private void btPopup_Click( object sender, RoutedEventArgs e)
13 {
14 childWindowDemo.Show();
15 }
16
8. 最后通过子窗口属性获取子窗口用户输入信息。
本文转自 冷秋寒 51CTO博客,原文链接:http://blog.51cto.com/kevinfan/235003 ,如需转载请自行联系原作者