Silverlight动态加载菜单和菜单动画（改良版：增加下拉条）
前几天发过一篇Silverlight动态加载菜单和菜单动画的文章，当时界面布局用的控件是Canvas，由于要对不同屏幕尺寸适应，所以需要更换布局元素，今天我就把我更改布局元素的代码分享一下，也算是对今天工作的一个总结吧！
代码部分：
Xaml代码： 容器这里改用StackPanel，外面嵌套ScrollViewer，内容超出后可以下拉
以前的页面：
<Canvas Margin="11,12,19,0" Width="100">
<Image Height="21" x:Name="Img_Story" Margin="0" Source="/UserCtrol.VMS;component/Images/sblb_roadbg.png" Stretch="Fill" VerticalAlignment="Top"/>
<Canvas Name="Canvas_KayoutRoot" Margin="25,0,0,0">
</Canvas>
</Canvas>
<Image Height="21" x:Name="Img_Story" Margin="0" Source="/UserCtrol.VMS;component/Images/sblb_roadbg.png" Stretch="Fill" VerticalAlignment="Top"/>
<Canvas Name="Canvas_KayoutRoot" Margin="25,0,0,0">
</Canvas>
</Canvas>
更改后的代码：
<ScrollViewer x:Name="scrolls" VerticalScrollBarVisibility="Auto" HorizontalScrollBarVisibility="Auto">
<StackPanel x:Name="Panel_Road" Margin="0,10">
</StackPanel>
</ScrollViewer>
<StackPanel x:Name="Panel_Road" Margin="0,10">
</StackPanel>
</ScrollViewer>
Xam.cs 代码: T代表你定义的对象
以前的代码：
/// <summary>
/// 定义白色
/// </summary>
SolidColorBrush WhiteColorBrush = new SolidColorBrush();
/// <summary>
/// 定义灰色
/// </summary>
SolidColorBrush OtherColorBrush = new SolidColorBrush();
//设置颜色
WhiteColorBrush.Color = Color.FromArgb(255, 255, 255, 255);
OtherColorBrush.Color = Color.FromArgb(255, 61, 61, 61);
/// <summary>
/// 遍历返回的数据加载到页面中
/// </summary>
/// <param name="_List">菜单列表</param>
private void AddElementToPage(List<T> _List)
{
Int32 elmentNum = 0; //当前列表的序列号
foreach (T item in _List)
{
TextBlock _TextBlock = new TextBlock();
_TextBlock.Text = item.Name;
Canvas.SetTop(_TextBlock, elmentNum * 30);
_TextBlock.FontSize = 14;
if (elmentNum == 0)
{
_TextBlock.Foreground = WhiteColorBrush;
}
else
{
_TextBlock.Foreground = OtherColorBrush;
}
//点击事件
_TextBlock.MouseLeftButtonDown += new MouseButtonEventHandler(_TextBlock_MouseLeftButtonDown);
//将元素添加到容器中
_NewDeviceItem.Canvas_KayoutRoot.Children.Add(_TextBlock);
elmentNum++;
}
}
/// <summary>
/// 点击事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void _TextBlock_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
TextBlock Txt_Road = sender as TextBlock;
//检索页面元素，设置文字颜色
foreach (FrameworkElement fe in _NewDeviceItem.Canvas_KayoutRoot.Children)
{
if (fe is TextBlock) //检索TextBlock
{
TextBlock chk = (TextBlock)fe;
if (chk.Equals(Txt_Road))
{
chk.Foreground = WhiteColorBrush; //当前点击的设为白色
}
else
{
chk.Foreground = OtherColorBrush; //其他的改变回原来默认颜色
}
}
}
//获得元素当前x坐标
Double Txt_Road_Left = Canvas.GetLeft(Txt_Road);
//获得元素当前x坐标
Double Txt_Road_Top = Canvas.GetTop(Txt_Road);
//创建点击动画
CreateStoryBoard(Txt_Road_Left, Txt_Road_Top);
}
/// <summary>
/// 创建点击动画
/// </summary>
/// <param name="Txt_Road_Left">x轴位置</param>
/// <param name="Txt_Road_Top">y轴位置</param>
private void CreateStoryBoard(Double Txt_Road_Left, Double Txt_Road_Top)
{
Storyboard storyboard = new Storyboard(); //实例化Storyboard
//实例化X轴动画对象
DoubleAnimation doubleAnimationX = new DoubleAnimation();
doubleAnimationX.Duration = new Duration(TimeSpan.FromMilliseconds(500)); //设置动画延时时间
doubleAnimationX.From = Txt_Road_Left - 10; //设置动画初始值
doubleAnimationX.To = Txt_Road_Left; //设置动画完成值
Storyboard.SetTarget(doubleAnimationX, this.Img_Story); //设置动画操作对象
Storyboard.SetTargetProperty(doubleAnimationX, new PropertyPath("(Canvas.Left)")); //设置动画操作对象的属性
storyboard.Children.Add(doubleAnimationX); //将动画加载到Storyboard
//实例化Y轴动画对象
DoubleAnimation doubleAnimationY = new DoubleAnimation();
doubleAnimationY.Duration = new Duration(TimeSpan.FromMilliseconds(0)); //设置动画延时时间
doubleAnimationY.From = Txt_Road_Top; //设置动画初始值
doubleAnimationY.To = Txt_Road_Top; //设置动画完成值
Storyboard.SetTarget(doubleAnimationY, this.Img_Story); //设置动画操作对象
Storyboard.SetTargetProperty(doubleAnimationY, new PropertyPath("(Canvas.Top)")); //设置动画操作对象的属性
storyboard.Children.Add(doubleAnimationY); //将动画加载到Storyboard
//开始动画
storyboard.Begin();
}
/// 定义白色
/// </summary>
SolidColorBrush WhiteColorBrush = new SolidColorBrush();
/// <summary>
/// 定义灰色
/// </summary>
SolidColorBrush OtherColorBrush = new SolidColorBrush();
//设置颜色
WhiteColorBrush.Color = Color.FromArgb(255, 255, 255, 255);
OtherColorBrush.Color = Color.FromArgb(255, 61, 61, 61);
/// <summary>
/// 遍历返回的数据加载到页面中
/// </summary>
/// <param name="_List">菜单列表</param>
private void AddElementToPage(List<T> _List)
{
Int32 elmentNum = 0; //当前列表的序列号
foreach (T item in _List)
{
TextBlock _TextBlock = new TextBlock();
_TextBlock.Text = item.Name;
Canvas.SetTop(_TextBlock, elmentNum * 30);
_TextBlock.FontSize = 14;
if (elmentNum == 0)
{
_TextBlock.Foreground = WhiteColorBrush;
}
else
{
_TextBlock.Foreground = OtherColorBrush;
}
//点击事件
_TextBlock.MouseLeftButtonDown += new MouseButtonEventHandler(_TextBlock_MouseLeftButtonDown);
//将元素添加到容器中
_NewDeviceItem.Canvas_KayoutRoot.Children.Add(_TextBlock);
elmentNum++;
}
}
/// <summary>
/// 点击事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void _TextBlock_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
TextBlock Txt_Road = sender as TextBlock;
//检索页面元素，设置文字颜色
foreach (FrameworkElement fe in _NewDeviceItem.Canvas_KayoutRoot.Children)
{
if (fe is TextBlock) //检索TextBlock
{
TextBlock chk = (TextBlock)fe;
if (chk.Equals(Txt_Road))
{
chk.Foreground = WhiteColorBrush; //当前点击的设为白色
}
else
{
chk.Foreground = OtherColorBrush; //其他的改变回原来默认颜色
}
}
}
//获得元素当前x坐标
Double Txt_Road_Left = Canvas.GetLeft(Txt_Road);
//获得元素当前x坐标
Double Txt_Road_Top = Canvas.GetTop(Txt_Road);
//创建点击动画
CreateStoryBoard(Txt_Road_Left, Txt_Road_Top);
}
/// <summary>
/// 创建点击动画
/// </summary>
/// <param name="Txt_Road_Left">x轴位置</param>
/// <param name="Txt_Road_Top">y轴位置</param>
private void CreateStoryBoard(Double Txt_Road_Left, Double Txt_Road_Top)
{
Storyboard storyboard = new Storyboard(); //实例化Storyboard
//实例化X轴动画对象
DoubleAnimation doubleAnimationX = new DoubleAnimation();
doubleAnimationX.Duration = new Duration(TimeSpan.FromMilliseconds(500)); //设置动画延时时间
doubleAnimationX.From = Txt_Road_Left - 10; //设置动画初始值
doubleAnimationX.To = Txt_Road_Left; //设置动画完成值
Storyboard.SetTarget(doubleAnimationX, this.Img_Story); //设置动画操作对象
Storyboard.SetTargetProperty(doubleAnimationX, new PropertyPath("(Canvas.Left)")); //设置动画操作对象的属性
storyboard.Children.Add(doubleAnimationX); //将动画加载到Storyboard
//实例化Y轴动画对象
DoubleAnimation doubleAnimationY = new DoubleAnimation();
doubleAnimationY.Duration = new Duration(TimeSpan.FromMilliseconds(0)); //设置动画延时时间
doubleAnimationY.From = Txt_Road_Top; //设置动画初始值
doubleAnimationY.To = Txt_Road_Top; //设置动画完成值
Storyboard.SetTarget(doubleAnimationY, this.Img_Story); //设置动画操作对象
Storyboard.SetTargetProperty(doubleAnimationY, new PropertyPath("(Canvas.Top)")); //设置动画操作对象的属性
storyboard.Children.Add(doubleAnimationY); //将动画加载到Storyboard
//开始动画
storyboard.Begin();
}
更改后的代码：
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using Microsoft.Phone.Controls;
using System.Windows.Media.Imaging;
namespace PhoneTest1
{
public partial class MaainPage : PhoneApplicationPage
{
/// <summary>
/// 记录最后一次点击
/// </summary>
Canvas _LastCanvas = new Canvas();
/// <summary>
/// 动画图片
/// </summary>
Image Img_Story = new Image();
/// <summary>
/// 定义白色
/// </summary>
SolidColorBrush WhiteColorBrush = new SolidColorBrush();
/// <summary>
/// 定义灰色
/// </summary>
SolidColorBrush OtherColorBrush = new SolidColorBrush();
public MainPage()
{
InitializeComponent();
this.Loaded += new RoutedEventHandler(MainPage_Loaded);
}
void MainPage_Loaded(object sender, RoutedEventArgs e)
{
//设置颜色
WhiteColorBrush.Color = Color.FromArgb(255, 255, 255, 255);
OtherColorBrush.Color = Color.FromArgb(255, 61, 61, 61);
Boolean _IsFirstAddElement = false;
for (int i = 0; i < 10; i++)
{
Canvas _Canvas = new Canvas();
_Canvas.Height = 60;
TextBlock _TextBlock = new TextBlock();
_TextBlock.Text = i.ToString() + "：测试程序"; //你自己重命名
Canvas.SetLeft(_TextBlock, 30); //30是距canvas左边，你自己可以调整
Canvas.SetZIndex(_TextBlock, 100); //设置图层，防止文本被遮盖
_TextBlock.FontSize = 30;
_Canvas.Children.Add(_TextBlock);
if (!_IsFirstAddElement)
{
_IsFirstAddElement = true;
this.Img_Story.Source = new BitmapImage(new Uri("/PhoneTest1;component/Image/Test.PNG", UriKind.RelativeOrAbsolute));
Canvas.SetLeft(Img_Story, 0); //30是距canvas左边，你自己可以调整
Canvas.SetZIndex(Img_Story, 0); //设置图层，防止文本被遮盖
_Canvas.Children.Add(this.Img_Story);
this._LastCanvas = _Canvas;
_TextBlock.Foreground = WhiteColorBrush;
}
else
{
_TextBlock.Foreground = OtherColorBrush;
}
//点击事件
_TextBlock.MouseLeftButtonDown += new MouseButtonEventHandler(_TextBlock_MouseLeftButtonDown);
//将元素添加到容器中
this.Panel_Element.Children.Add(_Canvas);
}
}
/// <summary>
/// 点击事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void _TextBlock_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
TextBlock Txt_Road = sender as TextBlock;
//检索页面元素，设置文字颜色
foreach (FrameworkElement fe in this.Panel_Element.Children)
{
if (fe is Canvas) //检索TextBlock
{
Canvas _Canvas = (Canvas)fe;
TextBlock chk = (TextBlock)_Canvas.Children[0];
if (chk.Equals(Txt_Road))
{
_LastCanvas.Children.Remove(this.Img_Story);
_Canvas.Children.Add(this.Img_Story);
this._LastCanvas = _Canvas;
chk.Foreground = WhiteColorBrush; //当前点击的设为白色
CreateStoryBoard();
}
else
{
chk.Foreground = OtherColorBrush; //其他的改变回原来默认颜色
}
}
}
}
/// <summary>
/// 创建点击动画
/// </summary>
private void CreateStoryBoard()
{
Storyboard storyboard = new Storyboard(); //实例化Storyboard
//实例化X轴动画对象
DoubleAnimation doubleAnimationX = new DoubleAnimation();
doubleAnimationX.Duration = new Duration(TimeSpan.FromMilliseconds(500)); //设置动画延时时间
doubleAnimationX.From = 0; //设置动画初始值
doubleAnimationX.To = 10; //设置动画完成值
Storyboard.SetTarget(doubleAnimationX, this.Img_Story); //设置动画操作对象
Storyboard.SetTargetProperty(doubleAnimationX, new PropertyPath("(Canvas.Left)")); //设置动画操作对象的属性
storyboard.Children.Add(doubleAnimationX); //将动画加载到Storyboard
//开始动画
storyboard.Begin();
}
}
}
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using Microsoft.Phone.Controls;
using System.Windows.Media.Imaging;
namespace PhoneTest1
{
public partial class MaainPage : PhoneApplicationPage
{
/// <summary>
/// 记录最后一次点击
/// </summary>
Canvas _LastCanvas = new Canvas();
/// <summary>
/// 动画图片
/// </summary>
Image Img_Story = new Image();
/// <summary>
/// 定义白色
/// </summary>
SolidColorBrush WhiteColorBrush = new SolidColorBrush();
/// <summary>
/// 定义灰色
/// </summary>
SolidColorBrush OtherColorBrush = new SolidColorBrush();
public MainPage()
{
InitializeComponent();
this.Loaded += new RoutedEventHandler(MainPage_Loaded);
}
void MainPage_Loaded(object sender, RoutedEventArgs e)
{
//设置颜色
WhiteColorBrush.Color = Color.FromArgb(255, 255, 255, 255);
OtherColorBrush.Color = Color.FromArgb(255, 61, 61, 61);
Boolean _IsFirstAddElement = false;
for (int i = 0; i < 10; i++)
{
Canvas _Canvas = new Canvas();
_Canvas.Height = 60;
TextBlock _TextBlock = new TextBlock();
_TextBlock.Text = i.ToString() + "：测试程序"; //你自己重命名
Canvas.SetLeft(_TextBlock, 30); //30是距canvas左边，你自己可以调整
Canvas.SetZIndex(_TextBlock, 100); //设置图层，防止文本被遮盖
_TextBlock.FontSize = 30;
_Canvas.Children.Add(_TextBlock);
if (!_IsFirstAddElement)
{
_IsFirstAddElement = true;
this.Img_Story.Source = new BitmapImage(new Uri("/PhoneTest1;component/Image/Test.PNG", UriKind.RelativeOrAbsolute));
Canvas.SetLeft(Img_Story, 0); //30是距canvas左边，你自己可以调整
Canvas.SetZIndex(Img_Story, 0); //设置图层，防止文本被遮盖
_Canvas.Children.Add(this.Img_Story);
this._LastCanvas = _Canvas;
_TextBlock.Foreground = WhiteColorBrush;
}
else
{
_TextBlock.Foreground = OtherColorBrush;
}
//点击事件
_TextBlock.MouseLeftButtonDown += new MouseButtonEventHandler(_TextBlock_MouseLeftButtonDown);
//将元素添加到容器中
this.Panel_Element.Children.Add(_Canvas);
}
}
/// <summary>
/// 点击事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void _TextBlock_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
TextBlock Txt_Road = sender as TextBlock;
//检索页面元素，设置文字颜色
foreach (FrameworkElement fe in this.Panel_Element.Children)
{
if (fe is Canvas) //检索TextBlock
{
Canvas _Canvas = (Canvas)fe;
TextBlock chk = (TextBlock)_Canvas.Children[0];
if (chk.Equals(Txt_Road))
{
_LastCanvas.Children.Remove(this.Img_Story);
_Canvas.Children.Add(this.Img_Story);
this._LastCanvas = _Canvas;
chk.Foreground = WhiteColorBrush; //当前点击的设为白色
CreateStoryBoard();
}
else
{
chk.Foreground = OtherColorBrush; //其他的改变回原来默认颜色
}
}
}
}
/// <summary>
/// 创建点击动画
/// </summary>
private void CreateStoryBoard()
{
Storyboard storyboard = new Storyboard(); //实例化Storyboard
//实例化X轴动画对象
DoubleAnimation doubleAnimationX = new DoubleAnimation();
doubleAnimationX.Duration = new Duration(TimeSpan.FromMilliseconds(500)); //设置动画延时时间
doubleAnimationX.From = 0; //设置动画初始值
doubleAnimationX.To = 10; //设置动画完成值
Storyboard.SetTarget(doubleAnimationX, this.Img_Story); //设置动画操作对象
Storyboard.SetTargetProperty(doubleAnimationX, new PropertyPath("(Canvas.Left)")); //设置动画操作对象的属性
storyboard.Children.Add(doubleAnimationX); //将动画加载到Storyboard
//开始动画
storyboard.Begin();
}
}
}
后台逻辑实现是我回家后自己重新写的，那些代码在公司忘记带回了，如果有问题大家可以留言，我一定尽快改正!
涉及知识点：Stackpanel、Canvas布局、容器内动态添加元素、遍历页面中的元素、故事板的使用
作者：彭海松
出处：http://www.cnblogs.com/haisongvip/
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