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WPF进度条继续动画

wpfanimationprogress-bar
7

我正在使用WPF的进度条，并将值设置为最大值。 但是，当达到最大值时，动画（即绿色效果）仍在继续。

我该如何停止它并获得一个完全填充的绿色进度条，而没有任何动画？

例如，以这个为例：

<Window x:Class="WpfApplication1.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Window1" Height="300" Width="300" Loaded="Window_Loaded">
    <Grid>
        <ProgressBar Height="30" Name="progressBar1" VerticalAlignment="Top" Minimum="0" Maximum="100" />
    </Grid>
</Window>

并且：

public partial class Window1 : Window
{
    private double _min;
    private double _max;

    public Window1()
    {
        InitializeComponent();
    }

    private void Window_Loaded(object sender, RoutedEventArgs e)
    {
        _min = progressBar1.Minimum;
        _max = progressBar1.Maximum;
        Thread thread = new Thread(Start);
        thread.Start();
    }

    private void Start()
    {
        for (double i = _min; i <= _max; i++)
        {
            Thread.Sleep(50);
            double value = i;
            Dispatcher.BeginInvoke(DispatcherPriority.Normal, new Action(() => progressBar1.Value = value));
        }
    }
}

当线程完成后，我总是能看到进度条上的动画效果（绿色条上的白色效果）。
谢谢您的帮助。
3个回答
2
我不太确定你的意思，但也许你需要将ProgressBar的IsIndeterminate属性设置为false。如果这样做不起作用，请给我们一些代码以帮助你进一步解决问题！
编辑： 动画是Windows Aero样式的一部分，某个设计师被付了大笔费用来设计它！因此，您不能仅使用属性删除动画。您可以通过编辑控件模板来改变现有ProgressBar的视觉外观。以下是WPF ProgressBar的整个控件模板。注意：您需要所有资源、对Window.Themes的xmlns引用，并且必须设置对PresentationFramwork.Aero dll的引用。我插入了一个注释，您可以在第二个和第三个渐变停止处将颜色FF000000更改为00000000，这样白色发光效果就消失了。我尝试实现一个触发器，它会在Value == Maximum时显示动画，但我失败了。还有其他人可以帮忙吗？
<Window x:Class="BlandProgressBarSpike.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:Microsoft_Windows_Themes="clr-namespace:Microsoft.Windows.Themes;assembly=PresentationFramework.Aero"
    Title="Window1" Height="300" Width="300"
    Loaded="Window_Loaded">
    <Window.Resources>
        <LinearGradientBrush x:Key="ProgressBarBackground" EndPoint="1,0" StartPoint="0,0">
            <GradientStop Color="#BABABA" Offset="0"/>
            <GradientStop Color="#C7C7C7" Offset="0.5"/>
            <GradientStop Color="#BABABA" Offset="1"/>
        </LinearGradientBrush>
        <LinearGradientBrush x:Key="ProgressBarBorderBrush" EndPoint="0,1" StartPoint="0,0">
            <GradientStop Color="#B2B2B2" Offset="0"/>
            <GradientStop Color="#8C8C8C" Offset="1"/>
        </LinearGradientBrush>
        <LinearGradientBrush x:Key="ProgressBarGlassyHighlight" EndPoint="0,1" StartPoint="0,0">
            <GradientStop Color="#50FFFFFF" Offset="0.5385"/>
            <GradientStop Color="#00FFFFFF" Offset="0.5385"/>
        </LinearGradientBrush>
        <LinearGradientBrush x:Key="ProgressBarTopHighlight" EndPoint="0,1" StartPoint="0,0">
            <GradientStop Color="#80FFFFFF" Offset="0.05"/>
            <GradientStop Color="#00FFFFFF" Offset="0.25"/>
        </LinearGradientBrush>
        <!-- This produces the whitish,moving glow-->
        <LinearGradientBrush x:Key="ProgressBarIndicatorAnimatedFill" EndPoint="0,0" StartPoint="-100,0" MappingMode="Absolute">
            <GradientStop Color="#00000000" Offset="0"/>
            <GradientStop Color="#FF000000" Offset="0.4"/>
            <GradientStop Color="#FF000000" Offset="0.6"/>
            <GradientStop Color="#00000000" Offset="1"/>
        </LinearGradientBrush>
        <LinearGradientBrush x:Key="ProgressBarIndicatorDarkEdgeLeft" EndPoint="1,0" StartPoint="0,0">
            <GradientStop Color="#0C000000" Offset="0"/>
            <GradientStop Color="#20000000" Offset="0.3"/>
            <GradientStop Color="#00000000" Offset="1"/>
        </LinearGradientBrush>
        <LinearGradientBrush x:Key="ProgressBarIndicatorDarkEdgeRight" EndPoint="1,0" StartPoint="0,0">
            <GradientStop Color="#00000000" Offset="0"/>
            <GradientStop Color="#20000000" Offset="0.7"/>
            <GradientStop Color="#0C000000" Offset="1"/>
        </LinearGradientBrush>
        <RadialGradientBrush x:Key="ProgressBarIndicatorLightingEffectLeft" RelativeTransform="1,0,0,1,0.5,0.5" RadiusX="1" RadiusY="1">
            <GradientStop Color="#60FFFFC4" Offset="0"/>
            <GradientStop Color="#00FFFFC4" Offset="1"/>
        </RadialGradientBrush>
        <LinearGradientBrush x:Key="ProgressBarIndicatorLightingEffect" EndPoint="0,0" StartPoint="0,1">
            <GradientStop Color="#60FFFFC4" Offset="0"/>
            <GradientStop Color="#00FFFFC4" Offset="1"/>
        </LinearGradientBrush>
        <RadialGradientBrush x:Key="ProgressBarIndicatorLightingEffectRight" RelativeTransform="1,0,0,1,-0.5,0.5" RadiusX="1" RadiusY="1">
            <GradientStop Color="#60FFFFC4" Offset="0"/>
            <GradientStop Color="#00FFFFC4" Offset="1"/>
        </RadialGradientBrush>
        <LinearGradientBrush x:Key="ProgressBarIndicatorGlassyHighlight" EndPoint="0,1" StartPoint="0,0">
            <GradientStop Color="#90FFFFFF" Offset="0.5385"/>
            <GradientStop Color="#00FFFFFF" Offset="0.5385"/>
        </LinearGradientBrush>
        <Style x:Key="BlandStyle" TargetType="{x:Type ProgressBar}">
            <Setter Property="Foreground" Value="#01D328"/>
            <Setter Property="Background" Value="{StaticResource ProgressBarBackground}"/>
            <Setter Property="BorderBrush" Value="{StaticResource ProgressBarBorderBrush}"/>
            <Setter Property="BorderThickness" Value="1"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type ProgressBar}">
                        <Grid SnapsToDevicePixels="true" x:Name="Background">
                            <Rectangle Fill="{TemplateBinding Background}" RadiusX="2" RadiusY="2"/>
                            <Border Margin="1" Background="{StaticResource ProgressBarGlassyHighlight}" CornerRadius="2"/>
                            <Border Margin="1" Background="{StaticResource ProgressBarTopHighlight}" BorderBrush="#80FFFFFF" BorderThickness="1,0,1,1"/>
                            <Rectangle Margin="1" x:Name="PART_Track"/>
                            <Decorator HorizontalAlignment="Left" Margin="1" x:Name="PART_Indicator">
                                <Grid x:Name="Foreground">
                                    <Grid.RowDefinitions>
                                        <RowDefinition/>
                                        <RowDefinition/>
                                    </Grid.RowDefinitions>
                                    <Grid.ColumnDefinitions>
                                        <ColumnDefinition MaxWidth="15"/>
                                        <ColumnDefinition Width="0.1*"/>
                                        <ColumnDefinition MaxWidth="15"/>
                                    </Grid.ColumnDefinitions>
                                    <Rectangle x:Name="Indicator" Fill="{TemplateBinding Foreground}" Grid.ColumnSpan="3" Grid.RowSpan="2"/>
                                    <Rectangle x:Name="Animation" Fill="{TemplateBinding Foreground}" Grid.ColumnSpan="3" Grid.RowSpan="2">
                                        <Rectangle.OpacityMask>
                                            <MultiBinding>
                                                <MultiBinding.Converter>
                                                    <Microsoft_Windows_Themes:ProgressBarHighlightConverter/>
                                                </MultiBinding.Converter>
                                                <Binding Source="{StaticResource ProgressBarIndicatorAnimatedFill}"/>
                                                <Binding Path="ActualWidth" ElementName="Background"/>
                                                <Binding Path="ActualHeight" ElementName="Background"/>
                                            </MultiBinding>
                                        </Rectangle.OpacityMask>
                                    </Rectangle>
                                    <Rectangle Margin="1,1,0,1" x:Name="LeftDark" Fill="{StaticResource ProgressBarIndicatorDarkEdgeLeft}" RadiusX="1" RadiusY="1" Grid.RowSpan="2"/>
                                    <Rectangle Margin="0,1,1,1" x:Name="RightDark" Fill="{StaticResource ProgressBarIndicatorDarkEdgeRight}" RadiusX="1" RadiusY="1" Grid.Column="2" Grid.RowSpan="2"/>
                                    <Rectangle x:Name="LeftLight" Fill="{StaticResource ProgressBarIndicatorLightingEffectLeft}" Grid.Column="0" Grid.Row="2"/>
                                    <Rectangle x:Name="CenterLight" Fill="{StaticResource ProgressBarIndicatorLightingEffect}" Grid.Column="1" Grid.Row="2"/>
                                    <Rectangle x:Name="RightLight" Fill="{StaticResource ProgressBarIndicatorLightingEffectRight}" Grid.Column="2" Grid.Row="2"/>
                                    <Border x:Name="Highlight1" Grid.ColumnSpan="3" Grid.RowSpan="2" Background="{StaticResource ProgressBarIndicatorGlassyHighlight}"/>
                                    <Border x:Name="Highlight2" Grid.ColumnSpan="3" Grid.RowSpan="2" Background="{StaticResource ProgressBarTopHighlight}"/>
                                </Grid>
                            </Decorator>
                            <Border BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" CornerRadius="2"/>
                        </Grid>
                        <ControlTemplate.Triggers>
                            <Trigger Property="Orientation" Value="Vertical">
                                <Setter Property="LayoutTransform" TargetName="Background">
                                    <Setter.Value>
                                        <RotateTransform Angle="-90"/>
                                    </Setter.Value>
                                </Setter>
                                <Setter Property="LayoutTransform" TargetName="PART_Track">
                                    <Setter.Value>
                                        <RotateTransform Angle="90"/>
                                    </Setter.Value>
                                </Setter>
                                <Setter Property="LayoutTransform" TargetName="PART_Indicator">
                                    <Setter.Value>
                                        <RotateTransform Angle="90"/>
                                    </Setter.Value>
                                </Setter>
                                <Setter Property="LayoutTransform" TargetName="Foreground">
                                    <Setter.Value>
                                        <RotateTransform Angle="-90"/>
                                    </Setter.Value>
                                </Setter>
                            </Trigger>
                            <Trigger Property="IsIndeterminate" Value="true">
                                <Setter Property="Visibility" TargetName="LeftDark" Value="Collapsed"/>
                                <Setter Property="Visibility" TargetName="RightDark" Value="Collapsed"/>
                                <Setter Property="Visibility" TargetName="LeftLight" Value="Collapsed"/>
                                <Setter Property="Visibility" TargetName="CenterLight" Value="Collapsed"/>
                                <Setter Property="Visibility" TargetName="RightLight" Value="Collapsed"/>
                                <Setter Property="Visibility" TargetName="Indicator" Value="Collapsed"/>
                            </Trigger>
                            <Trigger Property="IsIndeterminate" Value="false">
                                <Setter Property="Fill" TargetName="Animation" Value="#80B5FFA9"/>
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </Window.Resources> 
    <StackPanel>
        <ProgressBar Style="{StaticResource BlandStyle}" Value="{Binding Progress}" Height="30"
                     Minimum="0" Maximum="100"/>
    </StackPanel>           
</Window>
IsIndeterminate设置为false并不能解决我的问题。我已经编辑并附上了代码示例。 - Tim
这是一个好主意... 我使用了一个技巧，将酒吧拍摄为位图，并在完成时替换为图像。 很丑，但有效 :) - Tim
只要进度条不重新调整大小，这就是一个很好的解决方案！ - Dabblernl
1
同意“闪烁”动画对某些用户来说很困惑。它可以被移除而不会破坏Dabblernl上面的IsIndeterminate功能。
使用您可以在Dabblernl的帖子中找到的Aero样式，我替换了：
<Rectangle x:Name="Animation" Fill="{TemplateBinding Foreground}" Grid.ColumnSpan="3" Grid.RowSpan="2">
  <Rectangle.OpacityMask>
    <MultiBinding>
      <MultiBinding.Converter>
        <Microsoft_Windows_Themes:ProgressBarHighlightConverter/>
      </MultiBinding.Converter>
      <Binding Source="{StaticResource ProgressBarIndicatorAnimatedFill}"/>
      <Binding Path="ActualWidth" ElementName="Background"/>
      <Binding Path="ActualHeight" ElementName="Background"/>
    </MultiBinding>
  </Rectangle.OpacityMask>
</Rectangle>

使用：

<Rectangle x:Name="Animation" Grid.ColumnSpan="3" Fill="{TemplateBinding Foreground}" Grid.RowSpan="2">
  <Rectangle.OpacityMask>
    <MultiBinding>
      <MultiBinding.Converter>
        <converters:ProgressBarHighlightOverrideConverter/>
      </MultiBinding.Converter>
      <Binding RelativeSource="{RelativeSource TemplatedParent}" Path="Value"/>
      <Binding RelativeSource="{RelativeSource TemplatedParent}" Path="Maximum"/>
      <Binding Source="{StaticResource ProgressBarIndicatorAnimatedFill}"/>
      <Binding ElementName="Background" Path="ActualWidth"/>
      <Binding ElementName="Background" Path="ActualHeight"/>
    </MultiBinding>
  </Rectangle.OpacityMask>
</Rectangle>

"...并添加了一个新的MultiConverter："
using System;
using System.Globalization;
using System.Windows;
using System.Windows.Data;
using Microsoft.Windows.Themes;

namespace [Your namespace here]
{
  public class ProgressBarHighlightOverrideConverter : IMultiValueConverter
  {
    private readonly ProgressBarHighlightConverter converter = new ProgressBarHighlightConverter();

     public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
     {
      if (values[0] == null || values[0] == DependencyProperty.UnsetValue || 
          values[1] == null || values[1] == DependencyProperty.UnsetValue)
      {
         return null;
      }

      var value = (Double)values[0];
      var maximum = (Double)values[1];

      return value >= maximum ? null : converter.Convert(new [] {values[2], values[3], values[4]}, targetType, parameter, culture);
    }

    public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)
    {
      return null;
    }
  }
}

所以我实际上已经用自己的ProgressBarHighlightConverter替换了Microsoft的，只有在进度条的值小于其最大值时才会回退到原始转换器。
0

我认为这是Windows Aero的一个特性...所有的进度条都有这种效果，不认为它能被停止...

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