Silverlight子窗口(ChildWindow)传递参数到父窗口演示
Silverlight子窗口(ChildWindow)传递参数到父窗口演示
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
>
<
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，
string
testString;
public
string
TestString
{
get
{
return
testString;}
set
{ testString
=
value; }
}
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，
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，
private
void
OKButton_Click(
object
sender, RoutedEventArgs e)
{
if (OkClicked != null)
{
TestString = txtUserInfor.Text;
OkClicked(this, new EventArgs());
}
this.DialogResult = true;
}
{
if (OkClicked != null)
{
TestString = txtUserInfor.Text;
OkClicked(this, new EventArgs());
}
this.DialogResult = true;
}
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页面
代码
<
Grid x:Name
=
"
LayoutRoot
"
>
<
Grid.RowDefinitions
>
<
RowDefinition Height
=
"
Auto
"
/>
<
RowDefinition Height
=
"
*
"
/>
</
Grid.RowDefinitions
>
<
TextBlock x:Name
=
"
tbInfo
"
Grid.Row
=
"
0
"
/>
<
Button x:Name
=
"
btPopup
"
Grid.Row
=
"
1
"
Click
=
"
btPopup_Click
"
Width
=
"
140
"
Height
=
"
100
"
Content
=
"
打开子窗口
"
/>
</
Grid
>
8. 在父窗口MainPage.xaml中调用子窗口的OkClicked事件，
代码
public
MainPage()
{
InitializeComponent();
childWindowDemo.OkClicked
+=
new
EventHandler(childWindowDemo_OkClicked);
}
private
void
childWindowDemo_OkClicked(
object
sender, EventArgs e)
{
tbInfo.Text
=
childWindowDemo.TestString;
}
private
void
btPopup_Click(
object
sender, RoutedEventArgs e)
{
childWindowDemo.Show();
}
下载http://files.cnblogs.com/lilo202/chuangkongchuangcan.rar