超炫酷的WPF实现Loading控件效果

2024-09-29 22:17:31

Win8系统的Loading效果还是很不错的，网上也有人用CSS3等技术实现，研究了一下，并打算用WPF自定义一个Loading控件实现类似的效果，并可以让用户对Loading的颗粒（Particle）背景颜色进行自定义，话不多说，直接上代码：

1、用VS2012新建一个WPF的用户控件库项目WpfControlLibraryDemo，VS自动生成如下结构：

2、删除UserControl1.xaml，并新建一个Loading的CustomControl(不是UserControl),如下图所示：

3、如果报错找不到Loading类型，请编译，下面在Generic.xaml主题文件中对Loading的样式和内容进行定义（注意添加

xmlns:system = "clr-namespace:System;assembly=mscorlib"），代码如下：
<ResourceDictionary
 xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
 xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
 xmlns:system = "clr-namespace:System;assembly=mscorlib"
 xmlns:local="clr-namespace:WpfControlLibraryDemo">

 <Style TargetType="{x:Type local:Loading}">
 <Setter Property="Template">
  <Setter.Value>
  <ControlTemplate TargetType="{x:Type local:Loading}">
   <Border Background="{TemplateBinding Background}"
    BorderBrush="{TemplateBinding BorderBrush}"
    BorderThickness="{TemplateBinding BorderThickness}">
   <Grid Width = "50" Height = "50">
    <Grid.Resources>
    <!-- Value Converters -->

    <!-- Particle Styling ,must to has RelativeSource -->
    <SolidColorBrush x:Key = "ParticleColor" Color = "{Binding Path=FillColor,RelativeSource={RelativeSource TemplatedParent}}" />
    <SolidColorBrush x:Key = "ParticleBackgroundColor" Color = "Transparent"/>
    <system:Double x:Key = "ParticleOpacity">1</system:Double>
    <system:Double x:Key = "ParticleRadius">5</system:Double>

    <system:Double x:Key = "StartingPointX">0</system:Double>
    <system:Double x:Key = "StartingPointY">-20</system:Double>

    <system:Double x:Key = "RotationPointX">0.5</system:Double>
    <system:Double x:Key = "RotationPointY">0.5</system:Double>

    <!-- StoryBoard -->
    <system:TimeSpan x:Key = "StoryBoardBeginTimeP0">00:00:00.000</system:TimeSpan>
    <system:TimeSpan x:Key = "StoryBoardBeginTimeP1">00:00:00.100</system:TimeSpan>
    <system:TimeSpan x:Key = "StoryBoardBeginTimeP2">00:00:00.200</system:TimeSpan>
    <system:TimeSpan x:Key = "StoryBoardBeginTimeP3">00:00:00.300</system:TimeSpan>
    <system:TimeSpan x:Key = "StoryBoardBeginTimeP4">00:00:00.400</system:TimeSpan>
    <Duration x:Key = "StoryBoardDuration">00:00:01.800</Duration>

    <!-- Particle Origin Angles -->
    <system:Double x:Key = "ParticleOriginAngleP0">0</system:Double>
    <system:Double x:Key = "ParticleOriginAngleP1">-10</system:Double>
    <system:Double x:Key = "ParticleOriginAngleP2">-20</system:Double>
    <system:Double x:Key = "ParticleOriginAngleP3">-30</system:Double>
    <system:Double x:Key = "ParticleOriginAngleP4">-40</system:Double>

    <!-- Particle Position & Timing 1 -->
    <system:Double x:Key = "ParticleBeginAngle1">0</system:Double>
    <system:Double x:Key = "ParticleEndAngle1">90</system:Double>
    <system:TimeSpan x:Key = "ParticleBeginTime1">00:00:00.000</system:TimeSpan>
    <Duration x:Key = "ParticleDuration1">00:00:00.750</Duration>

    <!-- Particle Position & Timing 2 -->
    <system:Double x:Key = "ParticleBeginAngle2">90</system:Double>
    <system:Double x:Key = "ParticleEndAngle2">270</system:Double>
    <system:TimeSpan x:Key = "ParticleBeginTime2">00:00:00.751</system:TimeSpan>
    <Duration x:Key = "ParticleDuration2">00:00:00.300</Duration>

    <!-- Particle Position & Timing 3 -->
    <system:Double x:Key = "ParticleBeginAngle3">270</system:Double>
    <system:Double x:Key = "ParticleEndAngle3">360</system:Double>
    <system:TimeSpan x:Key = "ParticleBeginTime3">00:00:01.052</system:TimeSpan>
    <Duration x:Key = "ParticleDuration3">00:00:00.750</Duration>

    <Style x:Key = "EllipseStyle" TargetType = "Ellipse">
     <Setter Property = "Width" Value = "{StaticResource ParticleRadius}"/>
     <Setter Property = "Height" Value = "{StaticResource ParticleRadius}"/>
     <Setter Property = "Fill" Value = "{StaticResource ParticleColor}"/>
     <Setter Property = "RenderTransformOrigin" Value = "0.5, 0.5"/>
     <Setter Property = "Opacity" Value = "{StaticResource ParticleOpacity}"/>
    </Style>
    </Grid.Resources>
    <Canvas Width = "1" Height = "1" Margin="0,0,0,0">
    <Canvas.Triggers>
     <EventTrigger RoutedEvent = "Canvas.Loaded">
     <EventTrigger.Actions>
      <BeginStoryboard>
      <Storyboard

    BeginTime = "{StaticResource StoryBoardBeginTimeP0}"
    Duration = "{StaticResource StoryBoardDuration}"
    RepeatBehavior = "Forever">
       <DoubleAnimation
    Storyboard.TargetName = "p0"
    Storyboard.TargetProperty = "(UIElement.RenderTransform).(RotateTransform.Angle)"
    From = "{StaticResource ParticleBeginAngle1}"
    To = "{StaticResource ParticleEndAngle1}"
    BeginTime = "{StaticResource ParticleBeginTime1}"
    Duration = "{StaticResource ParticleDuration1}"/>
       <DoubleAnimation
    Storyboard.TargetName = "p0"
    Storyboard.TargetProperty = "(UIElement.RenderTransform).(RotateTransform.Angle)"
    From = "{StaticResource ParticleBeginAngle2}"
    To = "{StaticResource ParticleEndAngle2}"
    BeginTime = "{StaticResource ParticleBeginTime2}"
    Duration = "{StaticResource ParticleDuration2}"/>
       <DoubleAnimation
    Storyboard.TargetName = "p0"
    Storyboard.TargetProperty = "(UIElement.RenderTransform).(RotateTransform.Angle)"
    From = "{StaticResource ParticleBeginAngle3}"
    To = "{StaticResource ParticleEndAngle3}"
    BeginTime = "{StaticResource ParticleBeginTime3}"
    Duration = "{StaticResource ParticleDuration3}"/>
      </Storyboard>
      </BeginStoryboard>
      <BeginStoryboard>
      <Storyboard

    BeginTime = "{StaticResource StoryBoardBeginTimeP1}"
    Duration = "{StaticResource StoryBoardDuration}"
    RepeatBehavior = "Forever">

       <DoubleAnimation
    Storyboard.TargetName = "p1"
    Storyboard.TargetProperty = "(UIElement.RenderTransform).(RotateTransform.Angle)"
    From = "{StaticResource ParticleBeginAngle1}"
    To = "{StaticResource ParticleEndAngle1}"
    BeginTime = "{StaticResource ParticleBeginTime1}"
    Duration = "{StaticResource ParticleDuration1}"/>
       <DoubleAnimation
    Storyboard.TargetName = "p1"
    Storyboard.TargetProperty = "(UIElement.RenderTransform).(RotateTransform.Angle)"
    From = "{StaticResource ParticleBeginAngle2}"
    To = "{StaticResource ParticleEndAngle2}"
    BeginTime = "{StaticResource ParticleBeginTime2}"
    Duration = "{StaticResource ParticleDuration2}"/>
       <DoubleAnimation
    Storyboard.TargetName = "p1"
    Storyboard.TargetProperty = "(UIElement.RenderTransform).(RotateTransform.Angle)"
    From = "{StaticResource ParticleBeginAngle3}"
    To = "{StaticResource ParticleEndAngle3}"
    BeginTime = "{StaticResource ParticleBeginTime3}"
    Duration = "{StaticResource ParticleDuration3}"/>
      </Storyboard>
      </BeginStoryboard>
      <BeginStoryboard>
      <Storyboard

    BeginTime = "{StaticResource StoryBoardBeginTimeP2}"
    Duration = "{StaticResource StoryBoardDuration}"
    RepeatBehavior = "Forever">

       <DoubleAnimation
    Storyboard.TargetName = "p2"
    Storyboard.TargetProperty = "(UIElement.RenderTransform).(RotateTransform.Angle)"
    From = "{StaticResource ParticleBeginAngle1}"
    To = "{StaticResource ParticleEndAngle1}"
    BeginTime = "{StaticResource ParticleBeginTime1}"
    Duration = "{StaticResource ParticleDuration1}"/>
       <DoubleAnimation
    Storyboard.TargetName = "p2"
    Storyboard.TargetProperty = "(UIElement.RenderTransform).(RotateTransform.Angle)"
    From = "{StaticResource ParticleBeginAngle2}"
    To = "{StaticResource ParticleEndAngle2}"
    BeginTime = "{StaticResource ParticleBeginTime2}"
    Duration = "{StaticResource ParticleDuration2}"/>
       <DoubleAnimation
    Storyboard.TargetName = "p2"
    Storyboard.TargetProperty = "(UIElement.RenderTransform).(RotateTransform.Angle)"
    From = "{StaticResource ParticleBeginAngle3}"
    To = "{StaticResource ParticleEndAngle3}"
    BeginTime = "{StaticResource ParticleBeginTime3}"
    Duration = "{StaticResource ParticleDuration3}"/>
      </Storyboard>
      </BeginStoryboard>

      <BeginStoryboard>
      <Storyboard

    BeginTime = "{StaticResource StoryBoardBeginTimeP3}"
    Duration = "{StaticResource StoryBoardDuration}"
    RepeatBehavior = "Forever">

       <DoubleAnimation
    Storyboard.TargetName = "p3"
    Storyboard.TargetProperty = "(UIElement.RenderTransform).(RotateTransform.Angle)"
    From = "{StaticResource ParticleBeginAngle1}"
    To = "{StaticResource ParticleEndAngle1}"
    BeginTime = "{StaticResource ParticleBeginTime1}"
    Duration = "{StaticResource ParticleDuration1}"/>
       <DoubleAnimation
    Storyboard.TargetName = "p3"
    Storyboard.TargetProperty = "(UIElement.RenderTransform).(RotateTransform.Angle)"
    From = "{StaticResource ParticleBeginAngle2}"
    To = "{StaticResource ParticleEndAngle2}"
    BeginTime = "{StaticResource ParticleBeginTime2}"
    Duration = "{StaticResource ParticleDuration2}"/>
       <DoubleAnimation
    Storyboard.TargetName = "p3"
    Storyboard.TargetProperty = "(UIElement.RenderTransform).(RotateTransform.Angle)"
    From = "{StaticResource ParticleBeginAngle3}"
    To = "{StaticResource ParticleEndAngle3}"
    BeginTime = "{StaticResource ParticleBeginTime3}"
    Duration = "{StaticResource ParticleDuration3}"/>
      </Storyboard>
      </BeginStoryboard>

      <BeginStoryboard>
      <Storyboard

    BeginTime = "{StaticResource StoryBoardBeginTimeP4}"
    Duration = "{StaticResource StoryBoardDuration}"
    RepeatBehavior = "Forever">

       <DoubleAnimation
    Storyboard.TargetName = "p4"
    Storyboard.TargetProperty = "(UIElement.RenderTransform).(RotateTransform.Angle)"
    From = "{StaticResource ParticleBeginAngle1}"
    To = "{StaticResource ParticleEndAngle1}"
    BeginTime = "{StaticResource ParticleBeginTime1}"
    Duration = "{StaticResource ParticleDuration1}"/>
       <DoubleAnimation
    Storyboard.TargetName = "p4"
    Storyboard.TargetProperty = "(UIElement.RenderTransform).(RotateTransform.Angle)"
    From = "{StaticResource ParticleBeginAngle2}"
    To = "{StaticResource ParticleEndAngle2}"
    BeginTime = "{StaticResource ParticleBeginTime2}"
    Duration = "{StaticResource ParticleDuration2}"/>
       <DoubleAnimation
    Storyboard.TargetName = "p4"
    Storyboard.TargetProperty = "(UIElement.RenderTransform).(RotateTransform.Angle)"
    From = "{StaticResource ParticleBeginAngle3}"
    To = "{StaticResource ParticleEndAngle3}"
    BeginTime = "{StaticResource ParticleBeginTime3}"
    Duration = "{StaticResource ParticleDuration3}"/>
      </Storyboard>
      </BeginStoryboard>
     </EventTrigger.Actions>
     </EventTrigger>
    </Canvas.Triggers>
    <Border
  x:Name = "p0"
  Background = "{StaticResource ParticleBackgroundColor}"
  Opacity = "{StaticResource ParticleOpacity}">
     <Border.RenderTransform>
     <RotateTransform/>
     </Border.RenderTransform>
     <Border.RenderTransformOrigin>
     <Point X = "{StaticResource RotationPointX}" Y = "{StaticResource RotationPointY}"/>
     </Border.RenderTransformOrigin>
     <Ellipse Style = "{StaticResource EllipseStyle}">
     <Ellipse.RenderTransform>
      <TransformGroup>
      <TranslateTransform X = "{StaticResource StartingPointX}" Y = "{StaticResource StartingPointY}"/>
      <RotateTransform Angle = "{StaticResource ParticleOriginAngleP0}"/>
      </TransformGroup>
     </Ellipse.RenderTransform>
     </Ellipse>
    </Border>
    <Border
  x:Name = "p1"
  Background = "{StaticResource ParticleBackgroundColor}"
  Opacity = "{StaticResource ParticleOpacity}">
     <Border.RenderTransform>
     <RotateTransform/>
     </Border.RenderTransform>
     <Border.RenderTransformOrigin>
     <Point X = "{StaticResource RotationPointX}" Y = "{StaticResource RotationPointY}"/>
     </Border.RenderTransformOrigin>
     <Ellipse Style = "{StaticResource EllipseStyle}">
     <Ellipse.RenderTransform>
      <TransformGroup>
      <TranslateTransform X = "{StaticResource StartingPointX}" Y = "{StaticResource StartingPointY}"/>
      <RotateTransform Angle = "{StaticResource ParticleOriginAngleP1}"/>
      </TransformGroup>
     </Ellipse.RenderTransform>
     </Ellipse>
    </Border>
    <Border
  x:Name = "p2"
  Background = "{StaticResource ParticleBackgroundColor}"
  Opacity = "{StaticResource ParticleOpacity}">
     <Border.RenderTransform>
     <RotateTransform/>
     </Border.RenderTransform>
     <Border.RenderTransformOrigin>
     <Point X = "{StaticResource RotationPointX}" Y = "{StaticResource RotationPointY}"/>
     </Border.RenderTransformOrigin>
     <Ellipse Style = "{StaticResource EllipseStyle}">
     <Ellipse.RenderTransform>
      <TransformGroup>
      <TranslateTransform X = "{StaticResource StartingPointX}" Y = "{StaticResource StartingPointY}"/>
      <RotateTransform Angle = "{StaticResource ParticleOriginAngleP2}"/>
      </TransformGroup>
     </Ellipse.RenderTransform>
     </Ellipse>
    </Border>
    <Border
  x:Name = "p3"
  Background = "{StaticResource ParticleBackgroundColor}"
  Opacity = "{StaticResource ParticleOpacity}">
     <Border.RenderTransform>
     <RotateTransform/>
     </Border.RenderTransform>
     <Border.RenderTransformOrigin>
     <Point X = "{StaticResource RotationPointX}" Y = "{StaticResource RotationPointY}"/>
     </Border.RenderTransformOrigin>
     <Ellipse Style = "{StaticResource EllipseStyle}">
     <Ellipse.RenderTransform>
      <TransformGroup>
      <TranslateTransform X = "{StaticResource StartingPointX}" Y = "{StaticResource StartingPointY}"/>
      <RotateTransform Angle = "{StaticResource ParticleOriginAngleP3}"/>
      </TransformGroup>
     </Ellipse.RenderTransform>
     </Ellipse>
    </Border>
    <Border
  x:Name = "p4"
  Background = "{StaticResource ParticleBackgroundColor}"
  Opacity = "{StaticResource ParticleOpacity}">
     <Border.RenderTransform>
     <RotateTransform/>
     </Border.RenderTransform>
     <Border.RenderTransformOrigin>
     <Point X = "{StaticResource RotationPointX}" Y = "{StaticResource RotationPointY}"/>
     </Border.RenderTransformOrigin>
     <Ellipse Style = "{StaticResource EllipseStyle}">
     <Ellipse.RenderTransform>
      <TransformGroup>
      <TranslateTransform X = "{StaticResource StartingPointX}" Y = "{StaticResource StartingPointY}"/>
      <RotateTransform Angle = "{StaticResource ParticleOriginAngleP4}"/>
      </TransformGroup>
     </Ellipse.RenderTransform>
     </Ellipse>
    </Border>
    </Canvas>
   </Grid>

   </Border>
  </ControlTemplate>
  </Setter.Value>
 </Setter>
 </Style>

</ResourceDictionary>

在构建中发现，一开始在设定绑定时，写成<SolidColorBrush x:Key = "ParticleColor" Color = "{Binding Path=FillColor}" />一直都无法绑定成功，后来查了资料，改成<SolidColorBrush x:Key = "ParticleColor" Color = "{Binding Path=FillColor,RelativeSource={RelativeSource TemplatedParent}}" /> 后成功。

4、编辑Loading.cs文件，对自定义属性FillColor和逻辑进行编码：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace WpfControlLibraryDemo
{
 using System.ComponentModel;
 /// <summary>
 /// 按照步骤 1a 或 1b 操作，然后执行步骤 2 以在 XAML 文件中使用此自定义控件。
 ///
 /// 步骤 1a) 在当前项目中存在的 XAML 文件中使用该自定义控件。
 /// 将此 XmlNamespace 特性添加到要使用该特性的标记文件的根
 /// 元素中:
 ///
 /// xmlns:MyNamespace="clr-namespace:WpfControlLibraryDemo"
 ///
 ///
 /// 步骤 1b) 在其他项目中存在的 XAML 文件中使用该自定义控件。
 /// 将此 XmlNamespace 特性添加到要使用该特性的标记文件的根
 /// 元素中:
 ///
 /// xmlns:MyNamespace="clr-namespace:WpfControlLibraryDemo;assembly=WpfControlLibraryDemo"
 ///
 /// 您还需要添加一个从 XAML 文件所在的项目到此项目的项目引用，
 /// 并重新生成以避免编译错误:
 ///
 /// 在解决方案资源管理器中右击目标项目，然后依次单击
 /// “添加引用”->“项目”->[浏览查找并选择此项目]
 ///
 ///
 /// 步骤 2)
 /// 继续操作并在 XAML 文件中使用控件。
 ///
 /// <MyNamespace:Loading/>
 ///
 /// </summary>
 public class Loading : Control
 {
 static Loading()
 {
  //重载默认样式
  DefaultStyleKeyProperty.OverrideMetadata(typeof(Loading), new FrameworkPropertyMetadata(typeof(Loading)));
  //DependencyProperty 注册 FillColor
  FillColorProperty = DependencyProperty.Register("FillColor",
  typeof(Color),
  typeof(Loading),
  new UIPropertyMetadata(Colors.DarkBlue,
  new PropertyChangedCallback(OnUriChanged))
  );
  //Colors.DarkBlue为控件初始化默认值

 }
 //属性变更回调函数
 private static void OnUriChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
 {
  //Border b = (Border)d;
  //MessageBox.Show(e.NewValue.ToString());

 }
 #region 自定义Fields
 // DependencyProperty属性定义 FillColorProperty=FillColor+Property组成
 public static readonly DependencyProperty FillColorProperty;
 #endregion
 //VS设计器属性支持
 [Description("背景色"), Category("个性配置"), DefaultValue("#FF668899")]
 public Color FillColor
 {
  //GetValue,SetValue为固定写法，此处一般不建议处理其他逻辑
  get { return (Color)GetValue(FillColorProperty); }
  set { SetValue(FillColorProperty, value); }
 }
 }
}

5、编译，如果无误后，可以添加WPF应用程序WpfAppLoadingTest进行测试（添加项目引用）。

打开MainWindow.xaml，将Loading控件拖放到设计界面上，如下图所示：

6、控件颜色修改，选中控件，在属性栏中进行配置即可：

7.总结

可以看到WPF自定义控件还是比较容易的，但是难点在于UI的设计，如果需要做的美观，需要美工的参与，而且需要转换成XAML。

以上就是WPF实现炫酷Loading控件的全部内容，希望对大家的学习有所帮助。

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