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,
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<
controls:ChildWindow
x:Class
="SLChildWindow.ChildWindowDemo"
2
xmlns
="http://scheR_913_11845@as.microsoft.com/winfx/2006/xaml/presentation"
3
xmlns:x
="http://scheR_913_11845@as.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"
Grid.Row
="1"
/>
16
<
Button
x:Name
="OKButton"
Content
="OK"
Click
="OKButton_Click"
Width
="75"
Height
="23"
HorizontalAlignment
="Right"
Margin
="0,79,0"
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,
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String
testString;
2
3
public
String
TestString
4
5
{
6
7 get {return testString;}
8
9 set { testString = value; }
10
11 }
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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,
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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,
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private
void
OKButton_Click(
object
sender, routedEventArgs E)
2
@H_670_
673@
{
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,
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private
ChildWindowDemo childWindowDemo
=
new
ChildWindowDemo();
7. 在父窗口MainPage.xaml中调用子窗口的OkClicked事件,
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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 }
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8. 最后通过子窗口属性获取子窗口用户输入信息。
实例演示: http://silverlightchina.net/html/tips/2009/1125/261.html
代码下载: http://silverlightchina.net/uploads/soft/091125/1-091125163035.zip