There is already an open DataReader associated with this Command (十）
2012-07-24 16:01
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在使用DataReader的时候今天老是遇到这样的错误提示：（很长时间没有解决，找了好久好久,很多资料，数不清的网页才搞定）
1、datareader不能和其它的共用打开的conn；
2、对于datareader应该用完就关闭连接，并且关闭sqlDataReader
3、可以考虑使用sqlDataReader中的DataCommandBehavior(急不清楚怎么写了)。
1、datareader不能和其它的共用打开的conn；
2、对于datareader应该用完就关闭连接，并且关闭sqlDataReader
3、可以考虑使用sqlDataReader中的DataCommandBehavior(急不清楚怎么写了)。
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