【WPF控件】简约实用，进度百分比跟随显示的Progressbar

话不多说先上图：

有三部分组成：1. 底下灰色条部分   2.上层涂色部分  3. 百分比显示部分

<Style TargetType="{x:Type ProgressBar}">
                <Setter Property="Maximum" Value="100" />
                <Setter Property="Height" Value="70" />
                <Setter Property="Value" Value="20" />
                <Setter Property="Foreground" Value="#40a2c2"/>
                <Setter Property="SnapsToDevicePixels" Value="True" />
                <Setter Property="Template">
                    <Setter.Value>
                        <ControlTemplate TargetType="{x:Type ProgressBar}">
                            <Grid x:Name="Root">
                                <Grid.RowDefinitions>
                                    <RowDefinition></RowDefinition>
                                    <RowDefinition Height="35" ></RowDefinition>
                                </Grid.RowDefinitions>
                                <Grid  Grid.Row="0">
                                    <Canvas Grid.Row="0" Height="38">
                                        <Canvas x:Name="Tooltip" Canvas.Left="{Binding ActualWidth, ElementName=PART_Indicator,Converter={StaticResource progressBarValueLocationConverter}}">
                                            <Image x:Name="Shape_5" Height="30" Canvas.Left="4" Source="percentagebar_Images/Shape 5.png" Canvas.Top="2" Width="43">
                                                <Image.Effect>
                                                    <DropShadowEffect BlurRadius="3" Color="Black" Direction="-90" Opacity="0.43" ShadowDepth="2"/>
                                                </Image.Effect>
                                            </Image>
                                            <TextBlock Text="{Binding Value,  RelativeSource={RelativeSource AncestorType={x:Type ProgressBar}},Converter={StaticResource progressBarValueTextFormatConverter}}" Foreground="White" FontWeight="Bold" FontSize="13" FontFamily="Helvetica75-Bold" IsHyphenationEnabled="True" LineStackingStrategy="BlockLineHeight" Canvas.Left="13" LineHeight="13" TextAlignment="Left" TextWrapping="Wrap" Canvas.Top="9.56">
                                                <TextBlock.Effect>
                                                    <DropShadowEffect BlurRadius="0" Color="Black" Direction="-270" Opacity="1" ShadowDepth="1"/>
                                                </TextBlock.Effect>
                                            </TextBlock>
                                        </Canvas>
                                    </Canvas>
                                </Grid>

                                <Path  Grid.Row="1" x:Name="PART_Track" Data="F1M8,1C8,1 335,1 335,1 338.866,1 342,4.134 342,8 342,11.866 338.866,15 335,15 335,15 8,15 8,15 4.134,15 1,11.866 1,8 1,4.134 4.134,1 8,1z"  Canvas.Left="0" Canvas.Top="0">
                                    <Path.Effect>
                                        <DropShadowEffect BlurRadius="0" Color="White" Direction="-90" Opacity="0.26" ShadowDepth="1"/>
                                    </Path.Effect>
                                    <Path.Fill>
                                        <SolidColorBrush Color="Black" Opacity="0.23137254901960785"/>
                                    </Path.Fill>
                                </Path>
                                <Border Grid.Row="1" x:Name="PART_Indicator" BorderBrush="Transparent" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="3,2,0,0" Height="12" MaxWidth="338" Background="{TemplateBinding Foreground}" CornerRadius="7.5,7.5,7.5,7.5" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"></Border>
                               
                            </Grid>
                            <!--<ControlTemplate.Triggers>
                                <Trigger Property="Orientation" Value="Vertical">
                                    <Setter Property="LayoutTransform" TargetName="Root">
                                        <Setter.Value>
                                            <RotateTransform Angle="-90" />
                                        </Setter.Value>
                                    </Setter>
                                </Trigger>
                            </ControlTemplate.Triggers>-->
                        </ControlTemplate>
                    </Setter.Value>
                </Setter>
            </Style>

样式代码里可以看到 Tamplate里有两层，一层是上标进度百分比，一层是进度条。

由于上标和进度条base我是直接在Blend里导入psd图层生成的代码 所以是画布格式的。这也注定了整个图形不可改变，除非改变path或者Image。

另外下层的两个Border 命名必须是x:Name="PART_Track" 和 x:Name="PART_Indicator" 这是进度条样式规定。

关于注释部分，因为我是path画出来的base 本就横向，无法改成纵向，所以无法纵向属性触发，有大神有好的解决方法请留言赐教。

上标的位置是绑定为x:Name="PART_Indicator"的宽度，所以可以跟随显示。 textbook显示的是ProgressBar的Value值。这部分做了两个Convert转换器，分别是将画布Left值转成（x:Name="PART_Indicator"的宽度-25）、将textbook的文字格式化为ProgressBar的Value值+“%”。

public class ProgressBarValueLocationConverter :IValueConverter
    {
    
        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            return ((double)value - 25);
        }

        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            return 0;
        }
    }


public class ProgressBarValueTextFormatConverter:IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            return value.ToString() + "%";
        }

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

完成^^

使用的时候，可以改变Value值，Foreground值 

<ProgressBar  Foreground="Black" Value="10" HorizontalAlignment="Center" VerticalAlignment="Center"></ProgressBar>