<Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0"> 
            <StackPanel> 
                <!--进度条--> 
                <ProgressBar Height="74" Value="50"></ProgressBar> 
                <!--重复循环的动画--> 
                <ProgressBar IsIndeterminate="True" Height="50"></ProgressBar> 
                <!--不可使用--> 
                <ProgressBar Value="40" IsEnabled="False"></ProgressBar> 
                <!--设置最大值和最小值--> 
                <ProgressBar  Value="30" Minimum="20" Maximum="80" Height="80"> </ProgressBar> 
            </StackPanel> 
        </Grid>