WrapPanel組件作用是從左至右或從上至下依次安排位于其中的元素的位置，當元素超過該組件邊緣時，它們將會被自動安排至下一行或列。該組件一般用于文本布局、拾色器、圖片選擇等。本文將為大家介紹該組件的基本特性以及應用實例。

　　組件所在命名空間：

　　System.Windows.Controls

　　組件常用屬性：

　　ItemHeight：獲取或設置包含在WrapPanel組件中的每一個項目布局區域的高度。

　　ItemWidth：獲取或設置包含在WrapPanel組件中的每一個項目布局區域的寬度。

　　Orientation：獲取或設置子元素被安排布局的方向。

　　實例：

　　說明：WrapPanel組件還可以作為item組件面板模板使用，常作為ListBox等組件的item組件面板模板。具體可以參考園友Nasa的一篇文章：巧用WrapPanel為ItemsControl綁定數據

詳細的說明在代碼注釋中給出。

　　MainPage.xaml文件代碼：

<UserControl

   &nbsp;xmlns="//schemas.microsoft.com/winfx/2006/xaml/presentation"

    xmlns:x="//schemas.microsoft.com/winfx/2006/xaml"

    xmlns:d="//schemas.microsoft.com/expression/blend/2008&quot; xmlns:mc="//schemas.openxmlformats.org/markup-compatibility/2006"

   &nbsp;mc:Ignorable="d" xmlns:controlsToolkit="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Toolkit" x:Class="SilverlightClient.MainPage"

 &nbsp; &nbsp;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">

          &nbsp; <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文件代碼：

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

    {

      &nbsp; public MainPage()

        {

        &nbsp;   InitializeComponent();

        &nbsp;   //注冊事件觸發

     &nbsp;     ; this.Loaded += new RoutedEventHandler(MainPage_Loaded);

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

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

        }

        //設置WrapPanel的布局方向

        void chkHorizontal_Click(object sender, RoutedEventArgs e)

        {

  ;        &nbsp; if (chkHorizontal.IsChecked == true)

            {

   &nbsp;       &nbsp;    wp2.Orientation = Orientation.Horizontal;

       &nbsp;    }

 &nbsp;          else

            {

                wp2.Orientation = Orientation.Vertical;

      &nbsp;     }

        }

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

        {

   ;   &nbsp;    

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

        }

&nbsp;       void MainPage_Loaded(object sender, RoutedEventArgs e)

        {

     ;       //wp的內容添加

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

  &nbsp;      ;   {

                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) });

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

            &nbsp;   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) });

    &nbsp;    &nbsp;  }

   &nbsp;    &nbsp;   //wp2的內容添加

            for(int i=0;i<20;i++)

      &nbsp;     {

             &nbsp;  string s = "測試文字！";

 ;               TextBlock tb = new TextBlock();

             &nbsp;  tb.Text = s;

         &nbsp;      tb.FontSize = 14;

   ;             wp2.Children.Add(tb);

            }

     &nbsp;  &nbsp;   chkHorizontal.IsChecked = true;

        }

    }

}

　　最終效果圖：