Reporting Services字符串连接问题

nav*_*100 6 sql-server-2008 reporting-services

我正在尝试编写一个表达式来连接字符串,但是当我保存报表时,我收到一条错误消息.可能是什么问题呢?谢谢你的帮助.

=Fields!address.Value&","&Fields!city.Value&","&Fields!zipcode.Value&","&Fields!state.Value
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Dav*_*lin 10

.Value必须与&用空格分隔,否则无效.