WPF 进度条实现

1、样式

<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" Canvas.Top="2" Width="60">
<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="#FF0000" FontWeight="Bold" FontSize="30" 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>
</Setter.Value>
</Setter>
</Style>

2、界面

<ProgressBar Foreground="Blue" HorizontalAlignment="Center" VerticalAlignment="Center" Value="{Binding CurrentProgress, Mode=OneWay}"
Visibility="{Binding ProgressVisibility, Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"/>

3、转换器

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();
}
}