[源码下载]
稳扎稳打Silverlight(35) - 3.0控件之ChilDWindow,SavefileDialog,headeredItemsControl,VirtualizingStackPanel
作者：webabcd
介绍
Silverlight 3.0 控件一览：
ChilDWindow - 用于在父窗体前d出一个的子窗体 SavefileDialog - 用户发起的保存文件对话框（OpenfileDialog - 打开文件对话框） headeredItemsControl - 呈现标题和集合数据的控件 VirtualizingStackPanel - 虚拟化的 StackPanel（即仅生成需要显示的 UI 元素。当绑定了大量数据，而某时仅显示其中一小部分的时候，使用此控件则可大幅提高呈现效率）
在线DEMO
http://www.voidcn.com/article/p-boakcggz-tq.html
示例
1、演示 ChilDWindow 的应用
ChilDWindowDemo.xaml <navigation:Page x:Class="Silverlight30.Control.ChilDWindowDemo"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/Expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
xmlns:navigation="clr-namespace:System.windows.Controls;assembly=System.windows.Controls.Navigation"
d:DesignWIDth="640" d:DesignHeight="480"
title="ChilDWindowDemo Page">
<GrID x:name="LayoutRoot">
<StackPanel>
<button x:name="btnChilDWindow" Content="Show ChilDWindow" Click="btnChilDWindow_Click" />
<button x:name="btnCustomChilDWindow" Content="Show CustomChilDWindow" Click="btnCustomChilDWindow_Click" />
<TextBlock x:name="lblResult" />
</StackPanel>
</GrID>
</navigation:Page> ChilDWindowDemo.xaml.cs using System;
using System.Collections.Generic;
using System.linq;
using System.Net;
using System.windows;
using System.windows.Controls;
using System.windows.documents;
using System.windows.input;
using System.windows.Media;
using System.windows.Media.Animation;
using System.windows.Shapes;
using System.windows.Navigation;
namespace Silverlight30.Control
{
public partial class ChilDWindowDemo : Page
{
public ChilDWindowDemo()
{
InitializeComponent();
}
private voID btnChilDWindow_Click( object sender,RoutedEventArgs e)
{
/*
* ChilDWindow - 在父窗体前显示的子窗体
* Title - 子窗体的标题
* Content - 子窗体的内容
* HasClosebutton - 子窗体上是否要有关闭按钮（右上角的 ×）
* OverlayBrush - 子窗体打开后，覆盖在父窗体上的 Brush
* OverlayOpacity - 子窗体打开后，覆盖在父窗体上的 Brush 的不透明度
* WIDth - 子窗体的宽
* Height - 子窗体的高
* Closed事件 - 子窗体关闭后所触发的事件
* Show() - 打开（显示）子窗体
*/
ChilDWindow child = new ChilDWindow();
child.Title = "标题";
child.Content = "内容";
child.HasClosebutton = true;
child.OverlayBrush = new SolIDcolorBrush(colors.Red);
child.OverlayOpacity = 0.3;
child.WIDth = 320;
child.Height = 240;
child.Show();
}
voID child_Closed( object sender,EventArgs e)
{
/*
* ChilDWindow.DialogResult - 子窗体传递回来的一个 bool? 值（可以用来描述在子窗体中是单击了“确定”按钮还是“取消”按钮）
* ChilDWindow.DataContext - 子窗体传递回来的数据上下文
*/
CustomChilDWindow child = sender as CustomChilDWindow;
MessageBox.Show( string.Format( "DialogResult:{0}; DataContext:{1}",child.DialogResult,child.DataContext));
}
private voID btnCustomChilDWindow_Click( object sender,RoutedEventArgs e)
{
CustomChilDWindow child = new CustomChilDWindow();
child.Closed += new EventHandler(child_Closed);
child.Show();
}
}
} CustomChilDWindow.xaml（自定义子窗体） <controls:ChilDWindow x:Class="Silverlight30.Control.CustomChilDWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:controls="clr-namespace:System.windows.Controls;assembly=System.windows.Controls"
WIDth="320" Height="240"
title="我是标题">
<GrID x:name="LayoutRoot" margin="2">
<GrID.RowDeFinitions>
<RowDeFinition />
<RowDeFinition Height="auto" />
</GrID.RowDeFinitions>
<button x:name="Cancelbutton" Content="Cancel" Click="Cancelbutton_Click" WIDth="75" Height="23" HorizontalAlignment="Right" margin="0,12,0" GrID.Row="1" />
<button x:name="OKbutton" Content="OK" Click="OKbutton_Click" WIDth="75" Height="23" HorizontalAlignment="Right" margin="0,79,0" GrID.Row="1" />
</GrID>
</controls:ChilDWindow> CustomChilDWindow.xaml.cs using System;
using System.Collections.Generic;
using System.linq;
using System.Net;
using System.windows;
using System.windows.Controls;
using System.windows.documents;
using System.windows.input;
using System.windows.Media;
using System.windows.Media.Animation;
using System.windows.Shapes;
namespace Silverlight30.Control
{
public partial class CustomChilDWindow : System.windows.Controls.ChilDWindow
{
public CustomChilDWindow()
{
InitializeComponent();
}
private voID OKbutton_Click( object sender,RoutedEventArgs e)
{
/*
* ChilDWindow.DialogResult - 传递给父窗体的一个 bool? 值（可以用来描述在子窗体中是单击了“确定”按钮还是“取消”按钮）
* ChilDWindow.DataContext - 传递给父窗体的数据上下文
*/
this.DataContext = "点击了 OK 按钮";
this.DialogResult = true;
}
private voID Cancelbutton_Click( object sender,RoutedEventArgs e)
{
this.DataContext = "点击了 Cancel 按钮";
this.DialogResult = false;
}
}
} 2、SavefileDialog 和 OpenfileDialog 的演示
SavefileDialogDemo.xaml <navigation:Page x:Class="Silverlight30.Control.SavefileDialogDemo"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/Expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
xmlns:navigation="clr-namespace:System.windows.Controls;assembly=System.windows.Controls.Navigation"
d:DesignWIDth="640" d:DesignHeight="480"
title="SavefileDialog Page">
<GrID x:name="LayoutRoot">
<StackPanel>
<TextBox x:name="txtInfo" />
<button x:name="btnSave" Content="保存" Click="btnSave_Click" />
<button x:name="btnLoad" Content="载入" Click="btnLoad_Click" />
</StackPanel>
</GrID>
</navigation:Page> SavefileDialogDemo.xaml.cs using System;
using System.Collections.Generic;
using System.linq;
using System.Net;
using System.windows;
using System.windows.Controls;
using System.windows.documents;
using System.windows.input;
using System.windows.Media;
using System.windows.Media.Animation;
using System.windows.Shapes;
using System.windows.Navigation;
using System.IO;
using System.Text;
namespace Silverlight30.Control
{
public partial class SavefileDialogDemo : Page
{
public SavefileDialogDemo()
{
InitializeComponent();
}
private voID btnSave_Click( object sender,RoutedEventArgs e)
{
/*
* SavefileDialog - 用户发起的保存文件对话框
* Filter - 指定保存文件的描述信息及文件类型（出现在对话框的“保存类型”下拉列表中）
* DefaultExt - 当指定保存文件类型为 *.* 时的默认扩展名
* FilterIndex - 默认的保存类型在 Filter 中的索引（注意：索引从 1 开始）
* ShowDialog() - 显示保存文件对话框。用户在对话框中单击“保存”则返回 true；单击“取消”或关闭对话框则返回 false
* Openfile() - 打开用户选择的文件，并返回文件流
*/
SavefileDialog dialog = new SavefileDialog();
dialog.Filter = "Text files|*.txt|Log files|*.log|All files|*.*";
dialog.FilterIndex = 1;
bool? result = dialog.ShowDialog();
if (result == true)
{
using (Stream stream = dialog.Openfile())
{
byte[] info = EnCoding.UTF8.GetBytes(txtInfo.Text);
stream.Write(info,info.Length);
}
txtInfo.Text = "";
}
}
private voID btnLoad_Click( object sender,RoutedEventArgs e)
{
/*
* OpenfileDialog - 打开文件对话框
* Filter - 同 SavefileDialog
* FilterIndex - 同 SavefileDialog
* ShowDialog() - 显示打开文件对话框。用户在对话框中单击“打开”则返回 true；单击“取消”或关闭对话框则返回 false
* file - 返回用户所选择文件的的 fileInfo 对象
* Multiselect - 选择文件时可否多选
* files - 返回用户所选择文件的的 fileInfo 对象集合
*/
OpenfileDialog dialog = new OpenfileDialog();
dialog.Filter = "Text files|*.txt";
if (dialog.ShowDialog() == true)
{
using (fileStream fs = dialog.file.OpenRead())
{
byte[] buffer = new byte[fs.Length];
fs.Read(buffer,buffer.Length);
txtInfo.Text = EnCoding.UTF8.GetString(buffer,buffer.Length);
}
}
}
}
} 3、演示 headeredItemsControl 的使用
headeredItemsControl.xaml <navigation:Page xmlns:controls="clr-namespace:System.windows.Controls;assembly=System.windows.Controls" x:Class="Silverlight30.Control.headeredItemsControl"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/Expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
xmlns:navigation="clr-namespace:System.windows.Controls;assembly=System.windows.Controls.Navigation"
d:DesignWIDth="640" d:DesignHeight="480"
title="headeredItemsControl Page">
<GrID x:name="LayoutRoot">
<!--
headeredItemsControl - 呈现标题和集合数据的控件
headeredItemsControl.header,headeredItemsControl.headerTemplate - 用于显示标题
headeredItemsControl.Items,headeredItemsControl.ItemTemplate - 用于显示集合数据
-->
<controls:headeredItemsControl x:name="headeredItemsControl" >
<controls:headeredItemsControl.header>
<TextBlock Text="header" />
</controls:headeredItemsControl.header>
<controls:headeredItemsControl.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding}" />
</DataTemplate>
</controls:headeredItemsControl.ItemTemplate>
</controls:headeredItemsControl>
</GrID>
</navigation:Page> headeredItemsControl.xaml.cs using System;
using System.Collections.Generic;
using System.linq;
using System.Net;
using System.windows;
using System.windows.Controls;
using System.windows.documents;
using System.windows.input;
using System.windows.Media;
using System.windows.Media.Animation;
using System.windows.Shapes;
using System.windows.Navigation;
namespace Silverlight30.Control
{
public partial class headeredItemsControl : Page
{
public headeredItemsControl()
{
InitializeComponent();
this.Loaded += new RoutedEventHandler(headeredItemsControl_Loaded);
}
voID headeredItemsControl_Loaded( object sender,RoutedEventArgs e)
{
List< string> items = new List< string>();
for ( int i = 0; i < 5; i++)
{
items.Add(i.ToString().Padleft(10,'0'));
}
headeredItemsControl.ItemsSource = items;
}
}
} 4、演示 VirtualizingStackPanel 的应用
VirtualizingStackPanel.xaml <navigation:Page x:Class="Silverlight30.Control.VirtualizingStackPanel"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/Expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
xmlns:navigation="clr-namespace:System.windows.Controls;assembly=System.windows.Controls.Navigation"
d:DesignWIDth="640" d:DesignHeight="480"
title="VirtualizingStackPanel Page">
<GrID x:name="LayoutRoot">
<ListBox x:name="ListBox" VerticalAlignment="top" HorizontalAlignment="left"
Height="50" WIDth="300">
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
<!--
VirtualizingStackPanel - 虚拟化的 StackPanel（即仅生成需要显示的 UI 元素。当绑定了大量数据，而某时仅显示其中一小部分的时候，使用此控件则可大幅提高呈现效率）
OrIEntation - 数据的排列方式（垂直排列或水平排列）
-->
<VirtualizingStackPanel OrIEntation="Horizontal" />
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
<ListBox.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding}" />
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</GrID>
</navigation:Page> VirtualizingStackPanel.xaml.cs using System;
using System.Collections.Generic;
using System.linq;
using System.Net;
using System.windows;
using System.windows.Controls;
using System.windows.documents;
using System.windows.input;
using System.windows.Media;
using System.windows.Media.Animation;
using System.windows.Shapes;
using System.windows.Navigation;
namespace Silverlight30.Control
{
public partial class VirtualizingStackPanel : Page
{
public VirtualizingStackPanel()
{
InitializeComponent();
this.Loaded += new RoutedEventHandler(VirtualizingStackPanel_Loaded);
}
voID VirtualizingStackPanel_Loaded( object sender,RoutedEventArgs e)
{
List< string> items = new List< string>();
for ( int i = 0; i < 3000; i++)
{
items.Add(i.ToString().Padleft(10,'0'));
}
ListBox.ItemsSource = items;
}
}
} OK
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