BusyIndicator是SilverLight中的进度条控件。下面是一个例子

1.BusyIndicatorSample.xaml

<UserControl x:Class="Silverlight.Common.View.BusyIndicatorSample"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             xmlns:toolkit="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Toolkit"
    mc:Ignorable="d"
    d:DesignHeight="300" d:DesignWidth="400" Loaded="UserControl_Loaded">

<Grid x:Name="LayoutRoot" Background="White">
        <Grid.RowDefinitions>
            <RowDefinition />
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="160"/>
            <ColumnDefinition />
        </Grid.ColumnDefinitions>
        <toolkit:HeaderedContentControl Grid.Column="0" Width="160" Header="数据加载中---">
            <toolkit:BusyIndicator x:Name="BusyIndicator2" IsBusy="True" DisplayAfter="0"
              BusyContent="数据加载中---"></toolkit:BusyIndicator>
        </toolkit:HeaderedContentControl>

<toolkit:HeaderedContentControl Grid.Column="1" Header="数据下载中---">
            <toolkit:BusyIndicator  x:Name="BusyIndicator3"  IsBusy="True" DisplayAfter="0">
                <toolkit:BusyIndicator.BusyContentTemplate>
                    <DataTemplate>
                        <StackPanel Margin="4" >
                            <TextBlock Text="数据下载中---" FontWeight="Bold" HorizontalAlignment="Center"/>
                            <StackPanel Margin="4">
                                <TextBlock Text="已下载 99%..."/>
                                <ProgressBar Value="99" Height="15"/>
                            </StackPanel>
                            <Grid>
                                <Grid.ColumnDefinitions>
                                    <ColumnDefinition/>
                                    <ColumnDefinition/>
                                </Grid.ColumnDefinitions>
                                <Button Grid.Column="0" Content="停止" x:Name="btnStop"  HorizontalAlignment="Right" Margin="0 0 2 0"/>
                                <Button Grid.Column="1" Content="取消" x:Name="btnCancel"  HorizontalAlignment="Left" Margin="2 0 0 0"/>
                            </Grid>
                        </StackPanel>
                    </DataTemplate>
                </toolkit:BusyIndicator.BusyContentTemplate>
              
                <toolkit:BusyIndicator.ProgressBarStyle>
                    <Style TargetType="ProgressBar">
                        <Setter Property="Visibility" Value="Collapsed"/>
                    </Style>
                </toolkit:BusyIndicator.ProgressBarStyle>
            </toolkit:BusyIndicator>
        </toolkit:HeaderedContentControl>

</Grid>
</UserControl>

注：IsBusy属性设置为true才会显示进度。

　　HeaderedContentControl控件里放其他控件。

　　源码下载：http://files.cnblogs.com/salam/Silverlight.Common.rar