wpf 如何将条纹对进度条进行填充，而不是拉伸

这种情况应该是填充的进度条的是有损图片资源 ，在填充后放大出现拉伸。

建议使用WPF上面的画刷 SolidColorBrush或Color进行对进度条填充，这些资源在WPF框架都是矢量的。无论你放大多少倍都不会失真。

下面是我自己用的一个ProgressBar模板，可以使用下面的模板或自己定义：

        <LinearGradientBrush x:Key="WindowBackgroundBrush" EndPoint="0.5,1" StartPoint="0.5,0">

            <GradientStop Color="#FF4785B0" Offset="0"/>

            <GradientStop Color="#FF63AADA" Offset="1"/>

        </LinearGradientBrush>

        <Color x:Key="PrimaryColor">#FF63AADA</Color>

        <Color x:Key="SecondaryColor">#FFA0FCFF</Color>

        <SolidColorBrush x:Key="PrimaryBrush" Color="{StaticResource PrimaryColor}" />

        <SolidColorBrush x:Key="SecondaryBrush" Color="{DynamicResource SecondaryColor}" />

        <SolidColorBrush x:Key="TextBrush" Color="#FF152937" />

        <Style x:Key="{x:Type ProgressBar}" TargetType="{x:Type ProgressBar}">

            <Setter Property="Foreground" Value="{StaticResource TextBrush}" />

            <Setter Property="Background">

                <Setter.Value>

                    <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">

                        <GradientStop Color="#FFB4B4B4" />

                        <GradientStop Color="#FFFFFFFF" Offset="1" />

                    </LinearGradientBrush>

                </Setter.Value>

            </Setter>

            <Setter Property="BorderThickness" Value="1" />

            <Setter Property="Maximum" Value="100" />

            <Setter Property="IsTabStop" Value="False" />

            <Setter Property="BorderBrush" Value="{StaticResource PrimaryBrush}" />

            <Setter Property="Template">

                <Setter.Value>

                    <ControlTemplate TargetType="{x:Type ProgressBar}">

                        <Grid x:Name="Root" SnapsToDevicePixels="True">

                            <Grid.RowDefinitions>

                                <RowDefinition Height="0.5*" />

                                <RowDefinition Height="0.5*" />

                            </Grid.RowDefinitions>

                            <Border CornerRadius="4" x:Name="White" BorderBrush="#FFFFFFFF" BorderThickness="1" Grid.RowSpan="2">

                                <Border.Background>

                                    <RadialGradientBrush>

                                        <RadialGradientBrush.RelativeTransform>

                                            <TransformGroup>

                                                <ScaleTransform CenterX="0.5" CenterY="0.5" ScaleX="1.35" ScaleY="1.35" />

                                            </TransformGroup>

                                        </RadialGradientBrush.RelativeTransform>

                                        <GradientStop Color="#FFFFFFFF" Offset="0" />

                                        <GradientStop Color="#FFFFFFFF" Offset="1" />

                                    </RadialGradientBrush>

                                </Border.Background>

                            </Border>

                            <Border x:Name="PART_Track" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="1" CornerRadius="4,4,4,4" Grid.RowSpan="2" Opacity="0.65" />

                            <Grid x:Name="ProgressBarRootGrid" Grid.RowSpan="2">

                                <Rectangle x:Name="ProgressBarRootGradient" Canvas.ZIndex="1" Stroke="#FFFFFFFF" StrokeThickness="1" RadiusX="4" RadiusY="4" Opacity="0.65">

                                    <Rectangle.Fill>

                                        <LinearGradientBrush EndPoint="0.7,1.263" StartPoint="0.699999988079071,0">

                                            <GradientStop Color="{StaticResource PrimaryColor}" Offset="0.312" />

                                            <GradientStop Color="{StaticResource SecondaryColor}" Offset="1" />

                                        </LinearGradientBrush>

                                    </Rectangle.Fill>

                                </Rectangle>

                                <Grid x:Name="IndeterminateRoot" Visibility="Collapsed">

                                    <Rectangle Margin="{TemplateBinding BorderThickness}" x:Name="IndeterminateSolidFill" Opacity="1" RenderTransformOrigin="0.5,0.5" Fill="{TemplateBinding Foreground}" Stroke="#FF448DCA" StrokeThickness="0" RadiusX="4" RadiusY="4" />

                                    <Rectangle Margin="{TemplateBinding BorderThickness}" x:Name="IndeterminateGradientFill" Opacity="0.7" StrokeThickness="1" RadiusX="4" RadiusY="4">

                                        <Rectangle.Fill>

                                            <LinearGradientBrush MappingMode="Absolute" SpreadMethod="Repeat" EndPoint="0,1" StartPoint="20,1">

                                                <LinearGradientBrush.Transform>

                                                    <TransformGroup>

                                                        <TranslateTransform X="0" />

                                                        <SkewTransform AngleX="-30" />

                                                    </TransformGroup>

                                                </LinearGradientBrush.Transform>

                                                <GradientStop Color="#FFFFFFFF" Offset="0" />

                                                <GradientStop Color="#00FFFFFF" Offset=".25" />

                                                <GradientStop Color="#FFFFFFFF" Offset="0.85" />

                                            </LinearGradientBrush>

                                        </Rectangle.Fill>

                                    </Rectangle>

                                </Grid>

                                <Grid Margin="1" x:Name="DeterminateRoot">

                                    <Rectangle HorizontalAlignment="Left" Margin="2" x:Name="PART_Indicator" StrokeThickness="0.5" RadiusX="4" RadiusY="4" Fill="{StaticResource PrimaryBrush}" />

                                </Grid>

                            </Grid>

                            <Border BorderBrush="#ccFFFFFF" BorderThickness="1" CornerRadius="3.5" x:Name="InnerBorder" Margin="2" Grid.RowSpan="2" />

                            <Border CornerRadius="3.5" x:Name="Shadow" Margin="2" Opacity="0.2" Grid.RowSpan="2">

                                <Border.OpacityMask>

                                    <RadialGradientBrush>

                                        <RadialGradientBrush.RelativeTransform>

                                            <TransformGroup>

                                                <TranslateTransform X="0" Y="-0.5" />

                                            </TransformGroup>

                                        </RadialGradientBrush.RelativeTransform>

                                        <GradientStop Color="#00FFFFFF" Offset="0.3" />

                                        <GradientStop Color="#FFFFFFFF" Offset="1" />

                                    </RadialGradientBrush>

                                </Border.OpacityMask>

                                <Border.Background>

                                    <RadialGradientBrush>

                                        <RadialGradientBrush.RelativeTransform>

                                            <TransformGroup>

                                                <ScaleTransform CenterX="0.5" CenterY="0.5" ScaleX="1.75" ScaleY="2.25" />

                                                <TranslateTransform Y="0.65" />

                                            </TransformGroup>

                                        </RadialGradientBrush.RelativeTransform>

                                        <GradientStop Color="#00000000" Offset="0.55" />

                                        <GradientStop Color="#4C000000" Offset="1" />

                                    </RadialGradientBrush>

                                </Border.Background>

                            </Border>

                            <Border Margin="1" CornerRadius="4,4,4,10" x:Name="Highlight" Opacity="0.8" RenderTransformOrigin="0.5,1">

                                <Border.Background>

                                    <RadialGradientBrush>

                                        <RadialGradientBrush.RelativeTransform>

                                            <TransformGroup>

                                                <ScaleTransform CenterX="0.5" CenterY="0.5" ScaleX="1.25" ScaleY="2" />

                                                <TranslateTransform Y="-0.6" />

                                            </TransformGroup>

                                        </RadialGradientBrush.RelativeTransform>

                                        <GradientStop Color="#BFFFFFFF" Offset="0" />

                                        <GradientStop Color="#4CFFFFFF" Offset="1" />

                                    </RadialGradientBrush>

                                </Border.Background>

                            </Border>

                        </Grid>

                        <ControlTemplate.Triggers>

                            <Trigger Property="IsIndeterminate" Value="True">

                                <Trigger.EnterActions>

                                    <BeginStoryboard>

                                        <Storyboard RepeatBehavior="Forever">

                                            <DoubleAnimationUsingKeyFrames Storyboard.TargetName="IndeterminateGradientFill" Storyboard.TargetProperty="(Shape.Fill).(LinearGradientBrush.Transform).(TransformGroup.Children)[0].X">

                                                <SplineDoubleKeyFrame KeyTime="0" Value="0" />

                                                <SplineDoubleKeyFrame KeyTime="00:00:.5" Value="20" />

                                            </DoubleAnimationUsingKeyFrames>

                                        </Storyboard>

                                    </BeginStoryboard>

                                </Trigger.EnterActions>

                                <Setter Property="Visibility" Value="Visible" TargetName="IndeterminateRoot" />

                                <Setter Property="Visibility" Value="Collapsed" TargetName="DeterminateRoot" />

                            </Trigger>

                        </ControlTemplate.Triggers>

                    </ControlTemplate>

                </Setter.Value>

            </Setter>

        </Style>

亲测有效，运行效果：

这样，无论将ProgressBar怎样放大，进度条不会产生失真或拉伸的现象。

额, 哪有你这样搞的

可以用 BackgroundWorker 来处理任务, 通过 ProgressChanged 事件来报告进度

等我下班了给你做个 Demo, 你也可以先试试

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