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Failed to enable constraints. One or more rows contain values violating non-null, unique, or foreign

...etting the error. For C#, the command would be ? dataTable.GetErrors() For VB, the command is ? dataTable.GetErrors This will show you all datarows which have an error. You can get then look at the RowError for each of these, which should tell you the column that's invalid along with the problem....
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CodeFile vs CodeBehind

...odeFile compilation model files as DLLs if you don't like posting .cs and .vb files to a production server. When you Publish your project, you can optionally select "Precompile" options to turn either or both of your .aspx files and .cs/.vb files into DLLs, effectively like CodeBehind. ...
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企业级负载平衡简介 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...码 - 从芝麻金融被攻破说起》中,一位读者在评论中提出如果整个过程速度比较慢登陆会有问题这样一条评论...在之前的一篇文章《放好你的密码 - 从芝麻金融被攻破说起》中,一位读者在评论中提出“如果整个过程速度比...
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Stack Overflow:StackExchange网络不同主题网站的”祖父“ - 更多技术 - ...

...答网站Quora显然是硅谷的宠儿,有消息称该公司最近拒绝10亿美元的收购要约。 有趣的是,Quora并非最受欢迎的问答网站,根据Alexa和Compete的统计,由纽约创业家乔尔•斯伯斯基(Joel Spolsky)和杰夫•阿特伍德(Jeff Atwood...
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Embedding DLLs in a compiled executable

... VB NET developers like me don't be scared with that C++ at the link. ILMerge also works very easily for VB NET. See here https://github.com/dotnet/ILMerge. Thanks @Shog9 – Ivan Ferrer Villa ...
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实战做项目如何选择开源许可协议(一)-解协议 - 开源 & Github - 清泛网...

实战做项目如何选择开源许可协议(一)-解协议opensource_permission目前国内开源项目正在逐渐升温,中国也开始有不少优秀的开源项目突显出来。在大家摩拳擦掌准备加入开源大军时,也要知道这个圈子里的规则。...目前国内...
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服务器保持大量TIME_WAIT和CLOSE_WAIT的解决方法 - C/C++ - 清泛网 - 专注C/C++及内核技术

服务器保持大量TIME_WAIT和CLOSE_WAIT的解决方法昨天解决一个HttpClient调用错误导致的服务器异常,具体过程如下:http: blog.csdn.net shootyou article details 6615051里头的分析过...昨天解决一个HttpClient调用错误导致的服务器异常,具体...
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从网购到火车票,对比淘宝12306网为何如此烂? - 大数据 & AI - 清泛网 - ...

...为何如此烂?12306火车票购票系统,逢假日必瘫痪,引发强烈反响。在国庆前后,搜狐IT“问诊12306”做系列报道。当时,铁道系统的答复是,购票人数太多,数据量过大。但是,在前不久淘宝双11大促活动中,淘宝双十一总...
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浅析为什么char类型的范围是 -128~+127 - C/C++ - 清泛网 - 专注C/C++及内核技术

...,为1时表示负数,这样一来,能表示数值的就剩下(n-1)位,比如 char a= -1; 那么二进制表示就为 1 0000001, 1 表示为0 0000001 ,所以signed char 型除去符号位剩下的7位最大为1111 111 =127,再把符号加上,0 1111111=127 ,1 1111111= -127,范围...
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程序闹鬼... - 轻松一刻 - 清泛网 - 专注C/C++及内核技术

程序闹鬼...公司经常加班,程序员小五猝死,后来来一个妹子,坐的那个位置。大家都没告诉她猝死的事。某天晚上加班,妹子有段代码不会写,就让男朋...公司经常加班,程序员小五猝死,后来来一个妹子,坐的那...