出现这个异常，一般来说主要修改时候主键没有传递或者name属性指定错误。 解决方案：你要把你的更新的实例的主键传过去，可以以hidden的方式传。 参考:http://blog.csdn.net/chenssy/article/details/8362871
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其他好文 时间：
2014-07-26 14:57:20
阅读次数：
221
Moving TablesThe famous ACM (Advanced Computer Maker) Company has rented a floor of a building who...
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其他好文 时间：
2014-07-26 14:22:30
阅读次数：
263
Y2K Accounting BugTime Limit:1000MSMemory Limit:65536KTotal Submissions:10316Accepted:5136DescriptionAccounting for Computer Machinists (ACM) has suff...
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其他好文 时间：
2014-07-26 13:59:05
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242
I could also have called this "wildcard .NET mapping in IIS Express from web.config."I'm sure that, like, everyone out there but me has figured this o...
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其他好文 时间：
2014-07-26 13:58:34
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239
Problem Description
ZCC loves playing cards. He has n magical cards and each has a number on it. He wants to choose k cards and place them around in any order to form a circle. He can choose any se...
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其他好文 时间：
2014-07-26 03:02:26
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289
Problem Description
A while ago it was quite cumbersome to create a message for the Short Message Service (SMS) on a mobile phone. This was because you only have nine keys and the alphabet has more t...
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移动开发 时间：
2014-07-26 02:40:36
阅读次数：
332
In Zhejiang University, there are N different courses labeled from 1 to N. Each course has its own time slot during the week. We can represent the time slot of a course by an left-closed right-open in...
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其他好文 时间：
2014-07-26 02:15:16
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306
1.‘Building workspace’ has encountered a problem. Errors occurred during the build.解决方案：这样的错误，主要是由于JavaScript Validator校验工程文件所导致，解决方法是：Project → Prope...
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其他好文 时间：
2014-07-26 01:31:46
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191
Couple doubiTime Limit:1000MSMemory Limit:32768KB64bit IO Format:%I64d & %I64uSubmitStatusPracticeHDU 4861DescriptionDouBiXp has a girlfriend named Do...
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其他好文 时间：
2014-07-26 01:25:06
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281
Time Limit:1000MSMemory Limit:65536KB64bit IO Format:%I64d & %I64uSubmitStatusDescriptionFarmer John has built a new long barn, with N (2 #include #.....
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其他好文 时间：
2014-07-26 00:23:36
阅读次数：
286
