wpf里窗体嵌入winform控件被覆盖问题

问题1：嵌套Winform控件(ZedGraph)在WPF的ScrollViewer控件上，出现滚动条，无论如何设置该Winform控件都在顶层，滚动滚动条会覆盖其他WPF控件。

解决办法：在ScrollViewer上嵌套一层ElementHost,其作用相当于将ScrollViewer整一层又包装成Winform。

          <wfi:WindowsFormsHost><wfi:ElementHost><ScrollViewer />                 </wfi:ElementHost></wfi:WindowsFormsHost>


如： 
<UserControl x:Class="AnesMS.TakeManage.AnesPrintView"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:wfi ="clr-namespace:System.Windows.Forms.Integration;assembly=WindowsFormsIntegration"
             xmlns:wf ="clr-namespace:System.Windows.Forms;assembly=System.Windows.Forms"
             xmlns:zedgraph="clr-namespace:ZedGraph;assembly=ZedGraph"
             xmlns:GraphCtrl="clr-namespace:DIH.ORIMS.GraphControl;assembly=DIH.ORIMS.GraphControl"
             mc:Ignorable="d"
             x:Name="UserControl"
             d:DesignHeight="550" d:DesignWidth="1250">


<Grid Width="1024" Height="650">
        <Grid.RowDefinitions>
            <RowDefinition Height="40" />
            <RowDefinition Height="*" />
            <RowDefinition Height="50" />
        </Grid.RowDefinitions>
        <Label Content="打印预览" Style="{StaticResource PopBannerStyle}" VerticalAlignment="Stretch" HorizontalAlignment="Stretch"/>
        <wfi:WindowsFormsHost Grid.Row="1">
            <wfi:ElementHost>
                <ScrollViewer Grid.Row="1" Panel.ZIndex="0">

                    <wfi:WindowsFormsHost x:Name="winFormPrint" Width="760" Height="1080" Panel.ZIndex="-1">
                        <GraphCtrl:GraphCtrl x:Name="graphCtrl"  />
                    </wfi:WindowsFormsHost>
                </ScrollViewer>
            </wfi:ElementHost>
        </wfi:WindowsFormsHost>
        <StackPanel Orientation="Horizontal" Grid.Row="2">
            <Button Command="{Binding CancelCommand}" Style="{StaticResource LightGreenButton}" Content="关闭" HorizontalAlignment="Right" Margin="0,0,20,0" Name="button1" VerticalAlignment="Bottom" Width="75" Grid.Row="1" Height="37" />
            <Button IsEnabled="False" Content="打印" Height="37" HorizontalAlignment="Right" Margin="0,0,0,0" Name="button2" Style="{StaticResource LightGreenButton}" VerticalAlignment="Bottom" Width="75" Grid.Row="1" />
        </StackPanel>
    </Grid> 
</UserControl>