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永commandbuilder修改datagridview数据存储然后写入mysql中，出现问题

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Release： 2016-06-06 09:37:57
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datagridviewmysql数据存储数据库c++

图片说明
这是连接数据库的一些语句
图片说明
修改datagridview数据保存到datatable中
再利用update更新数据这样来实现。这个过程有问题吗？还是需要先设置hardwareparameter表的主键
图片说明
这是调试时出现的问题，求help

Related labels：
datagridview mysql 数据存储 数据库 c++
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