【转】WPF自定义控件与样式(11)-等待/忙/正在加载状态-控件实现

一．前言

　　申明：WPF自定义控件与样式是一个系列文章，前后是有些关联的，但大多是按照由简到繁的顺序逐步发布的等。

　　本文主要有三种实现方式：

• 简单忙碌状态控件BusyBox；
• Win8/win10效果忙碌状态控件ProgressRing；
• 弹出异步等待框WaitingBox；

二．简单忙碌状态控件BusyBox

　　效果图：

 

　　通过属性"IsActive"控制控件是否启用，后台C#代码：  

/// <summary>
    /// BusyBox.xaml 的交互逻辑
    /// </summary>
    public partial class BusyBox : UserControl
    {
        public static readonly DependencyProperty IsActiveProperty = DependencyProperty.Register("IsActive", typeof(bool), typeof(BusyBox), new PropertyMetadata(false));
        /// <summary>
        /// 是否启用
        /// </summary>
        public bool IsActive
        {
            get { return (bool)GetValue(IsActiveProperty); }
            set { SetValue(IsActiveProperty, value); }
        }

        static BusyBox()
        {
            DefaultStyleKeyProperty.OverrideMetadata(typeof(BusyBox), new FrameworkPropertyMetadata(typeof(BusyBox)));
        }
    }

使用了一个字体图标，触发器中实现动画显示的控制，样式代码：  

<Style TargetType="{x:Type local:BusyBox}">
        <Setter Property="Foreground" Value="{StaticResource TextForeground}"></Setter>
        <Setter Property="Width" Value="32"></Setter>
        <Setter Property="Height" Value="32"></Setter>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type local:BusyBox}">
                    <Grid VerticalAlignment="Center" HorizontalAlignment="Center" >
                        <Viewbox Stretch="Uniform"  VerticalAlignment="Center" HorizontalAlignment="Center">
                            <TextBlock Text="&#xe65f;" x:Name="FIcon" FontSize="36" Style="{StaticResource FIcon}"  RenderTransformOrigin="0.5,0.5"
                       Foreground="{TemplateBinding Foreground}">
                                <TextBlock.RenderTransform>
                                    <RotateTransform x:Name="TransFIcon" Angle="0"/>
                                </TextBlock.RenderTransform>
                            </TextBlock>
                        </Viewbox>
                    </Grid>
                    <ControlTemplate.Triggers>
                        <!--激活状态-->
                        <Trigger Property="IsActive" Value="true">
                            <Setter Property="Visibility" Value="Visible" TargetName="FIcon"/>
                            <Trigger.EnterActions>
                                <BeginStoryboard >
                                    <Storyboard >
                                        <DoubleAnimation RepeatBehavior="Forever" Storyboard.TargetName="TransFIcon" 
                                     Storyboard.TargetProperty="Angle" To="360" Duration="0:0:2.5"/>
                                    </Storyboard>
                                </BeginStoryboard>
                            </Trigger.EnterActions>
                            <Trigger.ExitActions>
                                <BeginStoryboard >
                                    <Storyboard >
                                        <DoubleAnimation RepeatBehavior="Forever" Storyboard.TargetName="TransFIcon" 
                                     Storyboard.TargetProperty="Angle" To="0" Duration="0"/>
                                    </Storyboard>
                                </BeginStoryboard>
                            </Trigger.ExitActions>
                        </Trigger>
                        <!--非激活状态-->
                        <Trigger Property="IsActive" Value="false">
                            <Setter Property="Visibility" Value="Collapsed" TargetName="FIcon"/>
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

使用示例：  

 <CheckBox VerticalAlignment="Center" x:Name="cbActive2" IsChecked="True" Margin="5">IsActive</CheckBox>
            <core:BusyBox Width="80" Height="80" Foreground="White" Background="Red"  Margin="5"  IsActive="{Binding IsChecked ,ElementName=cbActive2}" />
            <core:BusyBox Width="30" Height="30" Foreground="White" Background="Red"  Margin="5"  IsActive="{Binding IsChecked ,ElementName=cbActive2}" />

三．Win8/win10效果忙碌状态控件ProgressRing

　　这是网上一个开源项目里的控件，项目地址：http://mahapps.com/。不做多介绍了，效果图：

 

　　后台C#代码：  

[TemplateVisualState(Name = "Large", GroupName = "SizeStates")]
    [TemplateVisualState(Name = "Small", GroupName = "SizeStates")]
    [TemplateVisualState(Name = "Inactive", GroupName = "ActiveStates")]
    [TemplateVisualState(Name = "Active", GroupName = "ActiveStates")]
    public class ProgressRing : Control
    {
        public static readonly DependencyProperty BindableWidthProperty = DependencyProperty.Register("BindableWidth", typeof(double), typeof(ProgressRing), new PropertyMetadata(default(double), BindableWidthCallback));

        public static readonly DependencyProperty IsActiveProperty = DependencyProperty.Register("IsActive", typeof(bool), typeof(ProgressRing), new FrameworkPropertyMetadata(default(bool), FrameworkPropertyMetadataOptions.BindsTwoWayByDefault, IsActiveChanged));

        public static readonly DependencyProperty IsLargeProperty = DependencyProperty.Register("IsLarge", typeof(bool), typeof(ProgressRing), new PropertyMetadata(true, IsLargeChangedCallback));

        public static readonly DependencyProperty MaxSideLengthProperty = DependencyProperty.Register("MaxSideLength", typeof(double), typeof(ProgressRing), new PropertyMetadata(default(double)));

        public static readonly DependencyProperty EllipseDiameterProperty = DependencyProperty.Register("EllipseDiameter", typeof(double), typeof(ProgressRing), new PropertyMetadata(default(double)));

        public static readonly DependencyProperty EllipseOffsetProperty = DependencyProperty.Register("EllipseOffset", typeof(Thickness), typeof(ProgressRing), new PropertyMetadata(default(Thickness)));

        private List<Action> _deferredActions = new List<Action>();

        static ProgressRing()
        {
            DefaultStyleKeyProperty.OverrideMetadata(typeof(ProgressRing), new FrameworkPropertyMetadata(typeof(ProgressRing)));
            VisibilityProperty.OverrideMetadata(typeof(ProgressRing),
                                                new FrameworkPropertyMetadata(
                                                    new PropertyChangedCallback(
                                                        (ringObject, e) =>
                                                        {
                                                            if (e.NewValue != e.OldValue)
                                                            {
                                                                var ring = (ProgressRing)ringObject;
                                                                //auto set IsActive to false if we're hiding it.
                                                                if ((Visibility)e.NewValue != Visibility.Visible)
                                                                {
                                                                    //sets the value without overriding it's binding (if any).
                                                                    ring.SetCurrentValue(ProgressRing.IsActiveProperty, false);
                                                                }
                                                                else
                                                                {
                                                                    // #1105 don't forget to re-activate
                                                                    ring.IsActive = true;
                                                                }
                                                            }
                                                        })));
        }

        public ProgressRing()
        {
            SizeChanged += OnSizeChanged;
        }

        public double MaxSideLength
        {
            get { return (double)GetValue(MaxSideLengthProperty); }
            private set { SetValue(MaxSideLengthProperty, value); }
        }

        public double EllipseDiameter
        {
            get { return (double)GetValue(EllipseDiameterProperty); }
            private set { SetValue(EllipseDiameterProperty, value); }
        }

        public Thickness EllipseOffset
        {
            get { return (Thickness)GetValue(EllipseOffsetProperty); }
            private set { SetValue(EllipseOffsetProperty, value); }
        }

        public double BindableWidth
        {
            get { return (double)GetValue(BindableWidthProperty); }
            private set { SetValue(BindableWidthProperty, value); }
        }

        public bool IsActive
        {
            get { return (bool)GetValue(IsActiveProperty); }
            set { SetValue(IsActiveProperty, value); }
        }

        public bool IsLarge
        {
            get { return (bool)GetValue(IsLargeProperty); }
            set { SetValue(IsLargeProperty, value); }
        }

        private static void BindableWidthCallback(DependencyObject dependencyObject, DependencyPropertyChangedEventArgs dependencyPropertyChangedEventArgs)
        {
            var ring = dependencyObject as ProgressRing;
            if (ring == null)
                return;

            var action = new Action(() =>
            {
                ring.SetEllipseDiameter(
                    (double)dependencyPropertyChangedEventArgs.NewValue);
                ring.SetEllipseOffset(
                    (double)dependencyPropertyChangedEventArgs.NewValue);
                ring.SetMaxSideLength(
                    (double)dependencyPropertyChangedEventArgs.NewValue);
            });

            if (ring._deferredActions != null)
                ring._deferredActions.Add(action);
            else
                action();
        }

        private void SetMaxSideLength(double width)
        {
            MaxSideLength = width <= 20 ? 20 : width;
        }

        private void SetEllipseDiameter(double width)
        {
            EllipseDiameter = width / 8;
        }

        private void SetEllipseOffset(double width)
        {
            EllipseOffset = new Thickness(0, width / 2, 0, 0);
        }

        private static void IsLargeChangedCallback(DependencyObject dependencyObject, DependencyPropertyChangedEventArgs dependencyPropertyChangedEventArgs)
        {
            var ring = dependencyObject as ProgressRing;
            if (ring == null)
                return;

            ring.UpdateLargeState();
        }

        private void UpdateLargeState()
        {
            Action action;

            if (IsLarge)
                action = () => VisualStateManager.GoToState(this, "Large", true);
            else
                action = () => VisualStateManager.GoToState(this, "Small", true);

            if (_deferredActions != null)
                _deferredActions.Add(action);

            else
                action();
        }

        private void OnSizeChanged(object sender, SizeChangedEventArgs sizeChangedEventArgs)
        {
            BindableWidth = ActualWidth;
        }

        private static void IsActiveChanged(DependencyObject dependencyObject, DependencyPropertyChangedEventArgs dependencyPropertyChangedEventArgs)
        {
            var ring = dependencyObject as ProgressRing;
            if (ring == null)
                return;

            ring.UpdateActiveState();
        }

        private void UpdateActiveState()
        {
            Action action;

            if (IsActive)
                action = () => VisualStateManager.GoToState(this, "Active", true);
            else
                action = () => VisualStateManager.GoToState(this, "Inactive", true);

            if (_deferredActions != null)
                _deferredActions.Add(action);

            else
                action();
        }

        public override void OnApplyTemplate()
        {
            //make sure the states get updated
            UpdateLargeState();
            UpdateActiveState();
            base.OnApplyTemplate();
            if (_deferredActions != null)
                foreach (var action in _deferredActions)
                    action();
            _deferredActions = null;
        }
    }

    internal class WidthToMaxSideLengthConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value is double)
            {
                var width = (double)value;
                return width <= 20 ? 20 : width;
            }

            return null;
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }

样式代码：  

<Style TargetType="local:ProgressRing">
        <Setter Property="Foreground" Value="White" />
        <Setter Property="IsHitTestVisible" Value="False" />
        <Setter Property="HorizontalAlignment" Value="Center" />
        <Setter Property="VerticalAlignment" Value="Center" />
        <Setter Property="MinHeight" Value="20" />
        <Setter Property="MinWidth" Value="20" />
        <Setter Property="Height" Value="60" />
        <Setter Property="Width" Value="60" />
        <Setter Property="IsTabStop" Value="False" />
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="local:ProgressRing">
                    <Border Background="{TemplateBinding Background}" BorderThickness="{TemplateBinding BorderThickness}"
                            BorderBrush="{TemplateBinding BorderBrush}">
                        <Border.Resources>
                            <Style x:Key="ProgressRingEllipseStyle" TargetType="Ellipse">
                                <Setter Property="Opacity" Value="0" />
                                <Setter Property="HorizontalAlignment" Value="Left" />
                                <Setter Property="VerticalAlignment" Value="Top" />
                            </Style>
                        </Border.Resources>
                        <VisualStateManager.VisualStateGroups>
                            <VisualStateGroup x:Name="SizeStates">
                                <VisualState x:Name="Large">
                                    <Storyboard>
                                        <ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetName="SixthCircle"
                                                                       Storyboard.TargetProperty="Visibility">
                                            <DiscreteObjectKeyFrame KeyTime="0">
                                                <DiscreteObjectKeyFrame.Value>
                                                    <Visibility>Visible</Visibility>
                                                </DiscreteObjectKeyFrame.Value>
                                            </DiscreteObjectKeyFrame>
                                        </ObjectAnimationUsingKeyFrames>
                                    </Storyboard>
                                </VisualState>
                                <VisualState x:Name="Small" />
                            </VisualStateGroup>
                            <VisualStateGroup x:Name="ActiveStates">
                                <VisualState x:Name="Inactive" />
                                <VisualState x:Name="Active">
                                    <Storyboard RepeatBehavior="Forever">
                                        <ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetName="Ring"
                                                                       Storyboard.TargetProperty="Visibility">
                                            <DiscreteObjectKeyFrame KeyTime="0">
                                                <DiscreteObjectKeyFrame.Value>
                                                    <Visibility>Visible</Visibility>
                                                </DiscreteObjectKeyFrame.Value>
                                            </DiscreteObjectKeyFrame>
                                        </ObjectAnimationUsingKeyFrames>
                                        <DoubleAnimationUsingKeyFrames Storyboard.TargetName="E1" Storyboard.TargetProperty="Opacity" BeginTime="0">
                                            <DiscreteDoubleKeyFrame KeyTime="0" Value="1" />
                                            <DiscreteDoubleKeyFrame KeyTime="0:0:3.21" Value="1" />
                                            <DiscreteDoubleKeyFrame KeyTime="0:0:3.22" Value="0" />
                                            <DiscreteDoubleKeyFrame KeyTime="0:0:3.47" Value="0" />
                                        </DoubleAnimationUsingKeyFrames>
                                        <DoubleAnimationUsingKeyFrames Storyboard.TargetName="E2"
                                                                       Storyboard.TargetProperty="Opacity" BeginTime="00:00:00.167">
                                            <DiscreteDoubleKeyFrame KeyTime="0"  Value="1" />
                                            <DiscreteDoubleKeyFrame KeyTime="0:0:3.21" Value="1" />
                                            <DiscreteDoubleKeyFrame KeyTime="0:0:3.22" Value="0" />
                                            <DiscreteDoubleKeyFrame KeyTime="0:0:3.47" Value="0" />
                                        </DoubleAnimationUsingKeyFrames>
                                        <DoubleAnimationUsingKeyFrames Storyboard.TargetName="E3"
                                                                       Storyboard.TargetProperty="Opacity"  BeginTime="00:00:00.334">
                                            <DiscreteDoubleKeyFrame KeyTime="0"  Value="1" />
                                            <DiscreteDoubleKeyFrame KeyTime="0:0:3.21"  Value="1" />
                                            <DiscreteDoubleKeyFrame KeyTime="0:0:3.22"  Value="0" />
                                            <DiscreteDoubleKeyFrame KeyTime="0:0:3.47"  Value="0" />
                                        </DoubleAnimationUsingKeyFrames>
                                        <DoubleAnimationUsingKeyFrames Storyboard.TargetName="E4"
                                                                       Storyboard.TargetProperty="Opacity"  BeginTime="00:00:00.501">
                                            <DiscreteDoubleKeyFrame KeyTime="0"  Value="1" />
                                            <DiscreteDoubleKeyFrame KeyTime="0:0:3.21"  Value="1" />
                                            <DiscreteDoubleKeyFrame KeyTime="0:0:3.22"  Value="0" />
                                            <DiscreteDoubleKeyFrame KeyTime="0:0:3.47"  Value="0" />
                                        </DoubleAnimationUsingKeyFrames>
                                        <DoubleAnimationUsingKeyFrames Storyboard.TargetName="E5"
                                                                       Storyboard.TargetProperty="Opacity"  BeginTime="00:00:00.668">
                                            <DiscreteDoubleKeyFrame KeyTime="0"  Value="1" />
                                            <DiscreteDoubleKeyFrame KeyTime="0:0:3.21"  Value="1" />
                                            <DiscreteDoubleKeyFrame KeyTime="0:0:3.22"  Value="0" />
                                            <DiscreteDoubleKeyFrame KeyTime="0:0:3.47"  Value="0" />
                                        </DoubleAnimationUsingKeyFrames>
                                        <DoubleAnimationUsingKeyFrames Storyboard.TargetName="E6"
                                                                       Storyboard.TargetProperty="Opacity"  BeginTime="00:00:00.835">
                                            <DiscreteDoubleKeyFrame KeyTime="0"   Value="1" />
                                            <DiscreteDoubleKeyFrame KeyTime="0:0:3.21"   Value="1" />
                                            <DiscreteDoubleKeyFrame KeyTime="0:0:3.22"  Value="0" />
                                            <DiscreteDoubleKeyFrame KeyTime="0:0:3.47"   Value="0" />
                                        </DoubleAnimationUsingKeyFrames>
                                        <DoubleAnimationUsingKeyFrames Storyboard.TargetName="E1R"
                                                                       BeginTime="0"  Storyboard.TargetProperty="Angle">
                                            <SplineDoubleKeyFrame KeyTime="0"  Value="-110"   KeySpline="0.13,0.21,0.1,0.7" />
                                            <SplineDoubleKeyFrame KeyTime="0:0:0.433"   Value="10"  KeySpline="0.02,0.33,0.38,0.77" />
                                            <SplineDoubleKeyFrame KeyTime="0:0:1.2"  Value="93" />
                                            <SplineDoubleKeyFrame KeyTime="0:0:1.617"  Value="205"  KeySpline="0.57,0.17,0.95,0.75" />
                                            <SplineDoubleKeyFrame KeyTime="0:0:2.017"  Value="357"   KeySpline="0,0.19,0.07,0.72" />
                                            <SplineDoubleKeyFrame KeyTime="0:0:2.783"  Value="439" />
                                            <SplineDoubleKeyFrame KeyTime="0:0:3.217"  Value="585"   KeySpline="0,0,0.95,0.37" />
                                        </DoubleAnimationUsingKeyFrames>
                                        <DoubleAnimationUsingKeyFrames Storyboard.TargetName="E2R"
                                                                       BeginTime="00:00:00.167"   Storyboard.TargetProperty="Angle">
                                            <SplineDoubleKeyFrame KeyTime="0"  Value="-116"   KeySpline="0.13,0.21,0.1,0.7" />
                                            <SplineDoubleKeyFrame KeyTime="0:0:0.433"   Value="4"  KeySpline="0.02,0.33,0.38,0.77" />
                                            <SplineDoubleKeyFrame KeyTime="0:0:1.2"  Value="87" />
                                            <SplineDoubleKeyFrame KeyTime="0:0:1.617"  Value="199"   KeySpline="0.57,0.17,0.95,0.75" />
                                            <SplineDoubleKeyFrame KeyTime="0:0:2.017"  Value="351"  KeySpline="0,0.19,0.07,0.72" />
                                            <SplineDoubleKeyFrame KeyTime="0:0:2.783"  Value="433" />
                                            <SplineDoubleKeyFrame KeyTime="0:0:3.217"  Value="579"  KeySpline="0,0,0.95,0.37" />
                                        </DoubleAnimationUsingKeyFrames>
                                        <DoubleAnimationUsingKeyFrames Storyboard.TargetName="E3R"  BeginTime="00:00:00.334"
                                                                       Storyboard.TargetProperty="Angle">
                                            <SplineDoubleKeyFrame KeyTime="0"  Value="-122"  KeySpline="0.13,0.21,0.1,0.7" />
                                            <SplineDoubleKeyFrame KeyTime="0:0:0.433"   Value="-2"  KeySpline="0.02,0.33,0.38,0.77" />
                                            <SplineDoubleKeyFrame KeyTime="0:0:1.2"  Value="81" />
                                            <SplineDoubleKeyFrame KeyTime="0:0:1.617"  Value="193"  KeySpline="0.57,0.17,0.95,0.75" />
                                            <SplineDoubleKeyFrame KeyTime="0:0:2.017"  Value="345"  KeySpline="0,0.19,0.07,0.72" />
                                            <SplineDoubleKeyFrame KeyTime="0:0:2.783" Value="427" />
                                            <SplineDoubleKeyFrame KeyTime="0:0:3.217"   Value="573"  KeySpline="0,0,0.95,0.37" />
                                        </DoubleAnimationUsingKeyFrames>
                                        <DoubleAnimationUsingKeyFrames Storyboard.TargetName="E4R"
                                                                       BeginTime="00:00:00.501"  Storyboard.TargetProperty="Angle">
                                            <SplineDoubleKeyFrame KeyTime="0"   Value="-128"   KeySpline="0.13,0.21,0.1,0.7" />
                                            <SplineDoubleKeyFrame KeyTime="0:0:0.433"  Value="-8"  KeySpline="0.02,0.33,0.38,0.77" />
                                            <SplineDoubleKeyFrame KeyTime="0:0:1.2"  Value="75" />
                                            <SplineDoubleKeyFrame KeyTime="0:0:1.617"   Value="187"  KeySpline="0.57,0.17,0.95,0.75" />
                                            <SplineDoubleKeyFrame KeyTime="0:0:2.017" Value="339" KeySpline="0,0.19,0.07,0.72" />
                                            <SplineDoubleKeyFrame KeyTime="0:0:2.783" Value="421" />
                                            <SplineDoubleKeyFrame KeyTime="0:0:3.217"  Value="567" KeySpline="0,0,0.95,0.37" />
                                        </DoubleAnimationUsingKeyFrames>
                                        <DoubleAnimationUsingKeyFrames Storyboard.TargetName="E5R"
                                                                       BeginTime="00:00:00.668" Storyboard.TargetProperty="Angle">
                                            <SplineDoubleKeyFrame KeyTime="0"  Value="-134"  KeySpline="0.13,0.21,0.1,0.7" />
                                            <SplineDoubleKeyFrame KeyTime="0:0:0.433"  Value="-14"  KeySpline="0.02,0.33,0.38,0.77" />
                                            <SplineDoubleKeyFrame KeyTime="0:0:1.2"  Value="69" />
                                            <SplineDoubleKeyFrame KeyTime="0:0:1.617"  Value="181" KeySpline="0.57,0.17,0.95,0.75" />
                                            <SplineDoubleKeyFrame KeyTime="0:0:2.017" Value="331"  KeySpline="0,0.19,0.07,0.72" />
                                            <SplineDoubleKeyFrame KeyTime="0:0:2.783" Value="415" />
                                            <SplineDoubleKeyFrame KeyTime="0:0:3.217" Value="561"  KeySpline="0,0,0.95,0.37" />
                                        </DoubleAnimationUsingKeyFrames>
                                        <DoubleAnimationUsingKeyFrames Storyboard.TargetName="E6R" BeginTime="00:00:00.835"
                                                                       Storyboard.TargetProperty="Angle">
                                            <SplineDoubleKeyFrame KeyTime="0" Value="-140"  KeySpline="0.13,0.21,0.1,0.7" />
                                            <SplineDoubleKeyFrame KeyTime="0:0:0.433"  Value="-20"  KeySpline="0.02,0.33,0.38,0.77" />
                                            <SplineDoubleKeyFrame KeyTime="0:0:1.2" Value="63" />
                                            <SplineDoubleKeyFrame KeyTime="0:0:1.617" Value="175" KeySpline="0.57,0.17,0.95,0.75" />
                                            <SplineDoubleKeyFrame KeyTime="0:0:2.017" Value="325"  KeySpline="0,0.19,0.07,0.72" />
                                            <SplineDoubleKeyFrame KeyTime="0:0:2.783" Value="409" />
                                            <SplineDoubleKeyFrame KeyTime="0:0:3.217"  Value="555"  KeySpline="0,0,0.95,0.37" />
                                        </DoubleAnimationUsingKeyFrames>
                                    </Storyboard>
                                </VisualState>
                            </VisualStateGroup>
                        </VisualStateManager.VisualStateGroups>
                        <Grid x:Name="Ring"
                              Margin="{TemplateBinding Padding}"
                              MaxWidth="{Binding MaxSideLength, RelativeSource={RelativeSource Mode=TemplatedParent}}"
                              MaxHeight="{Binding MaxSideLength, RelativeSource={RelativeSource Mode=TemplatedParent}}"
                              Visibility="Collapsed"  RenderTransformOrigin=".5,.5"   FlowDirection="LeftToRight">

                            <Canvas RenderTransformOrigin=".5,.5">
                                <Canvas.RenderTransform>
                                    <RotateTransform x:Name="E1R" />
                                </Canvas.RenderTransform>
                                <Ellipse x:Name="E1"
                                         Style="{StaticResource ProgressRingEllipseStyle}"
                                         Width="{Binding EllipseDiameter, RelativeSource={RelativeSource Mode=TemplatedParent}}"
                                         Height="{Binding EllipseDiameter, RelativeSource={RelativeSource Mode=TemplatedParent}}"
                                         Margin="{Binding EllipseOffset, RelativeSource={RelativeSource Mode=TemplatedParent}}"
                                         Fill="{TemplateBinding Foreground}" />
                            </Canvas>
                            <Canvas RenderTransformOrigin=".5,.5">
                                <Canvas.RenderTransform>
                                    <RotateTransform x:Name="E2R" />
                                </Canvas.RenderTransform>
                                <Ellipse x:Name="E2"
                                         Style="{StaticResource ProgressRingEllipseStyle}"
                                         Width="{Binding EllipseDiameter, RelativeSource={RelativeSource Mode=TemplatedParent}}"
                                         Height="{Binding EllipseDiameter, RelativeSource={RelativeSource Mode=TemplatedParent}}"
                                         Margin="{Binding EllipseOffset, RelativeSource={RelativeSource Mode=TemplatedParent}}"
                                         Fill="{TemplateBinding Foreground}" />
                            </Canvas>
                            <Canvas RenderTransformOrigin=".5,.5">
                                <Canvas.RenderTransform>
                                    <RotateTransform x:Name="E3R" />
                                </Canvas.RenderTransform>
                                <Ellipse x:Name="E3"
                                         Style="{StaticResource ProgressRingEllipseStyle}"
                                         Width="{Binding EllipseDiameter, RelativeSource={RelativeSource Mode=TemplatedParent}}"
                                         Height="{Binding EllipseDiameter, RelativeSource={RelativeSource Mode=TemplatedParent}}"
                                         Margin="{Binding EllipseOffset, RelativeSource={RelativeSource Mode=TemplatedParent}}"
                                         Fill="{TemplateBinding Foreground}" />
                            </Canvas>
                            <Canvas RenderTransformOrigin=".5,.5">
                                <Canvas.RenderTransform>
                                    <RotateTransform x:Name="E4R" />
                                </Canvas.RenderTransform>
                                <Ellipse x:Name="E4"
                                         Style="{StaticResource ProgressRingEllipseStyle}"
                                         Width="{Binding EllipseDiameter, RelativeSource={RelativeSource Mode=TemplatedParent}}"
                                         Height="{Binding EllipseDiameter, RelativeSource={RelativeSource Mode=TemplatedParent}}"
                                         Margin="{Binding EllipseOffset, RelativeSource={RelativeSource Mode=TemplatedParent}}"
                                         Fill="{TemplateBinding Foreground}" />
                            </Canvas>
                            <Canvas RenderTransformOrigin=".5,.5">
                                <Canvas.RenderTransform>
                                    <RotateTransform x:Name="E5R" />
                                </Canvas.RenderTransform>
                                <Ellipse x:Name="E5"
                                         Style="{StaticResource ProgressRingEllipseStyle}"
                                         Width="{Binding EllipseDiameter, RelativeSource={RelativeSource Mode=TemplatedParent}}"
                                         Height="{Binding EllipseDiameter, RelativeSource={RelativeSource Mode=TemplatedParent}}"
                                         Margin="{Binding EllipseOffset, RelativeSource={RelativeSource Mode=TemplatedParent}}"
                                         Fill="{TemplateBinding Foreground}" />
                            </Canvas>
                            <Canvas RenderTransformOrigin=".5,.5"
                                    Visibility="Collapsed"
                                    x:Name="SixthCircle">
                                <Canvas.RenderTransform>
                                    <RotateTransform x:Name="E6R" />
                                </Canvas.RenderTransform>
                                <Ellipse x:Name="E6"
                                         Style="{StaticResource ProgressRingEllipseStyle}"
                                         Width="{Binding EllipseDiameter, RelativeSource={RelativeSource Mode=TemplatedParent}}"
                                         Height="{Binding EllipseDiameter, RelativeSource={RelativeSource Mode=TemplatedParent}}"
                                         Margin="{Binding EllipseOffset, RelativeSource={RelativeSource Mode=TemplatedParent}}"
                                         Fill="{TemplateBinding Foreground}" />
                            </Canvas>
                        </Grid>
                    </Border>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

使用示例：  

 <CheckBox VerticalAlignment="Center" x:Name="cbActive" Margin="5" IsChecked="True">IsActive</CheckBox>
            <core:ProgressRing Width="80" Height="80" Foreground="Red" Margin="5"  IsActive="{Binding IsChecked ,ElementName=cbActive}" />

四．弹出异步等待框WaitingBox

　　效果图：

 

　　使用的是一个模式窗体，异步执行传入的操作，实现的比较简单，没有做异常处理。另外一个缺陷就是没有支持取消操作。后台C#代码：  

/// <summary>
    /// 简单等待框
    /// </summary>
    public partial class WaitingBox : Window
    {
        public string Text { get { return this.txtMessage.Text; } set { this.txtMessage.Text = value; } }

        private Action _Callback;

        public WaitingBox(Action callback)
        {
            InitializeComponent();
            this._Callback = callback;
            this.Loaded += WaitingBox_Loaded;
        }

        void WaitingBox_Loaded(object sender, RoutedEventArgs e)
        {
            this._Callback.BeginInvoke(this.OnComplate, null);
        }

        private void OnComplate(IAsyncResult ar)
        {
            this.Dispatcher.Invoke(new Action(() =>
            {
                this.Close();
            }));
        }
        /// <summary>
        /// 显示等待框，owner指定宿主视图元素，callback为需要执行的方法体（需要自己做异常处理）。
        /// 目前等等框为模式窗体
        /// </summary>
        public static void Show(FrameworkElement owner, Action callback, string mes = "有一种幸福，叫做等待...")
        {
            WaitingBox win = new WaitingBox(callback);
            Window pwin = Window.GetWindow(owner);
            win.Owner = pwin;
            win.Text = mes;
            var loc = owner.PointToScreen(new Point());
            win.Left = loc.X + (owner.ActualWidth - win.Width) / 2;
            win.Top = loc.Y + (owner.ActualHeight - win.Height) / 2;
            win.ShowDialog();
        }
    }

样式代码：  

<Window x:Class="System.Windows.WaitingBox" x:Name="wb"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
        AllowsTransparency="True" WindowStyle="None" WindowStartupLocation="Manual"
        ShowInTaskbar="False" Background="Transparent"
        Title="WaitingBox" Height="110" Width="260">
    <Grid>
        <!--Background="{Binding Path=Background,ElementName=wb}"-->
        <Border Background="{StaticResource WaitingBoxBackground}"  Opacity="0.89" CornerRadius="1" Effect="{StaticResource WindowDropShadow}"></Border>
        <StackPanel VerticalAlignment="Center"  Orientation="Horizontal" HorizontalAlignment="Center" Margin="5">
            <TextBlock Text="&#xe65f;" x:Name="FIcon" FontSize="50" Style="{StaticResource FIcon}"  RenderTransformOrigin="0.5,0.5" Margin="3">
                <TextBlock.RenderTransform>
                    <RotateTransform x:Name="TransFIcon" Angle="0"/>
                </TextBlock.RenderTransform>
            </TextBlock>
            <TextBlock x:Name="txtMessage" Margin="2,10,15,10" Width="160" VerticalAlignment="Center" TextWrapping="Wrap">Loading...</TextBlock>
        </StackPanel>
    </Grid>
    <Window.Triggers>
        <EventTrigger RoutedEvent="Window.Loaded">
            <BeginStoryboard >
                <Storyboard >
                    <DoubleAnimation RepeatBehavior="Forever" Storyboard.TargetName="TransFIcon" 
                                     Storyboard.TargetProperty="Angle" To="360" Duration="0:0:2.5"/>
                </Storyboard>
            </BeginStoryboard>
        </EventTrigger>
    </Window.Triggers>
</Window>

使用比较简单，示例：  

 WaitingBox.Show(this, () =>
            {
                System.Threading.Thread.Sleep(3000);
            },"正在玩命的加载，请稍后...");
            var res = MessageBoxX.Question("已经完了？");

原文地址：https://www.cnblogs.com/anding/p/5006279.html