彩票走势图

　　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="//schemas.microsoft.com/winfx/2006/xaml/presentation"

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

 &nbsp;  xmlns:d="//schemas.microsoft.com/expression/blend/2008" xmlns:mc="//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"

 &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">

   &nbsp; &nbsp;      <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()

        {

      &nbsp;     InitializeComponent();

   ;       &nbsp; //注册事件触发

          &nbsp; 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)

        {

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

     &nbsp;      {

      &nbsp;         wp2.Orientation = Orientation.Horizontal;

  &nbsp;     &nbsp;   }

            else

            {

                wp2.Orientation = Orientation.Vertical;

 &nbsp;          }

        }

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

        {

&nbsp;        &nbsp; 

            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++)

   &nbsp; ;       {

    &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) });

                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) });

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

              &nbsp; 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;  //wp2的内容添加

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

    &nbsp;&nbsp;      {

      &nbsp;         string s = "测试文字！";

  &nbsp;            ; TextBlock tb = new TextBlock();

             ; &nbsp; tb.Text = s;

       &nbsp;        tb.FontSize = 14;

              &nbsp; wp2.Children.Add(tb);

     &nbsp;      }

     &nbsp;      chkHorizontal.IsChecked = true;

        }

    }

}

　　最终效果图：