不存在标记“CrystalReportsViewer”

Question

   我是一名新手，最近自己在学习水晶报表，写了一个小例子，但是出现了如下的错误：
错误 6 XML 命名空间“clr-namespace:SAPBusinessObjects.WPF.Viewer;assembly=SAPBusinessObjects.WPF.Viewer”中不存在
                标记“CrystalReportsViewer”。 位置 E:\workspace\CryReportDemo\CryReportDemo\ShowEmpReport.xaml
<Window x:Class="CryReportDemo.ShowEmpReport"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="ShowEmpReport" Height="496" Width="516" xmlns:my="clr-namespace:SAPBusinessObjects.WPF.Viewer;assembly=SAPBusinessObjects.WPF.Viewer" Loaded="Window_Loaded">
    <Grid>
        <my:CrystalReportsViewer HorizontalAlignment="Left" Margin="12,12,0,0" Name="crystalReportsViewer1" VerticalAlignment="Top" Height="433" />
    </Grid>
</Window>  所以请教各位~~

Answer 1

我写自定义window也遇到同样问题

Answer 2

 参考 
http://topic.csdn.net/u/20110822/21/9fa2bc21-3002-4fa8-8f48-afb869176841.html