有关WrapPanel组件的研究——Silverlight学习笔记[35]

WrapPanel组件作用是从左至右或从上至下依次安排位于其中的元素的位置，当元素超过该组件边缘时，它们将会被自动安排至下一行或列。该组件一般用于文本布局、拾色器、图片选择等。本文将为大家介绍该组件的基本特性以及应用实例。

组件所在命名空间：

System.Windows.Controls

组件常用属性：

ItemHeight：获取或设置包含在WrapPanel组件中的每一个项目布局区域的高度。

ItemWidth：获取或设置包含在WrapPanel组件中的每一个项目布局区域的宽度。

Orientation：获取或设置子元素被安排布局的方向。

实例：

说明：WrapPanel组件还可以作为item组件面板模板使用，常作为ListBox等组件的item组件面板模板。具体可以参考园友Nasa的一篇文章：巧用WrapPanel为ItemsControl绑定数据

详细的说明在代码注释中给出。

MainPage.xaml文件代码：

<UserControl

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:controlsToolkit="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Toolkit" x:Class="SilverlightClient.MainPage"

d:DesignWidth="320" d:DesignHeight="480">

<Grid x:Name="LayoutRoot" Width="320" Height="480" Background="White">

<Slider x:Name="HSlider" Height="23" Margin="8,202,8,0" VerticalAlignment="Top" Maximum="100" Value="100"/>

<Border x:Name="theContainer" Margin="8,8,8,0" BorderBrush="Black" BorderThickness="1" Height="190" VerticalAlignment="Top">

<controlsToolkit:WrapPanel x:Name="wp" Margin="-1"/>

</Border>

<Border Margin="8,234,8,52" BorderBrush="Black" BorderThickness="1">

<controlsToolkit:WrapPanel x:Name="wp2" Margin="-1"/>

</Border>

<CheckBox x:Name="chkHorizontal" Height="22" HorizontalAlignment="Left" Margin="7,0,0,24" VerticalAlignment="Bottom" Width="95" Content="是否水平" FontSize="16"/>

</Grid>

</UserControl>

MainPage.xaml.cs文件代码：

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 SilverlightClient

{

public partial class MainPage : UserControl

{

public MainPage()

{

InitializeComponent();

//注册事件触发

this.Loaded += new RoutedEventHandler(MainPage_Loaded);

this.HSlider.ValueChanged += new RoutedPropertyChangedEventHandler<double>(HSlider_ValueChanged);

this.chkHorizontal.Click += new RoutedEventHandler(chkHorizontal_Click);

}

//设置WrapPanel的布局方向

void chkHorizontal_Click(object sender, RoutedEventArgs e)

{

if (chkHorizontal.IsChecked == true)

{

wp2.Orientation = Orientation.Horizontal;

}

else

{

wp2.Orientation = Orientation.Vertical;

}

}

void HSlider_ValueChanged(object sender, RoutedPropertyChangedEventArgs<double> e)

{

wp.Width = theContainer.ActualWidth * HSlider.Value / 100.0;

}

void MainPage_Loaded(object sender, RoutedEventArgs e)

{

//wp的内容添加

for (int i = 0; i < 20; i++)

{

wp.Children.Add(new Rectangle() { Height = 20, Width = 20, Fill = new SolidColorBrush(Colors.Black) });

wp.Children.Add(new Rectangle() { Height = 20, Width = 20, Fill = new SolidColorBrush(Colors.Blue) });

wp.Children.Add(new Rectangle() { Height = 20, Width = 20, Fill = new SolidColorBrush(Colors.Brown) });

wp.Children.Add(new Rectangle() { Height = 20, Width = 20, Fill = new SolidColorBrush(Colors.Cyan) });

wp.Children.Add(new Rectangle() { Height = 20, Width = 20, Fill = new SolidColorBrush(Colors.DarkGray) });

wp.Children.Add(new Rectangle() { Height = 20, Width = 20, Fill = new SolidColorBrush(Colors.Green) });

wp.Children.Add(new Rectangle() { Height = 20, Width = 20, Fill = new SolidColorBrush(Colors.Magenta) });

wp.Children.Add(new Rectangle() { Height = 20, Width = 20, Fill = new SolidColorBrush(Colors.Purple) });

wp.Children.Add(new Rectangle() { Height = 20, Width = 20, Fill = new SolidColorBrush(Colors.Yellow) });

}

//wp2的内容添加

for(int i=0;i<20;i++)

{

string s = "测试文字！";

TextBlock tb = new TextBlock();

tb.Text = s;

tb.FontSize = 14;

wp2.Children.Add(tb);

}

chkHorizontal.IsChecked = true;

}

}

}

最终效果图：



作者：Kinglee
文章出处：Kinglee’s Blog (http://www.cnblogs.com/Kinglee/)
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