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Which is preferred: Nullable<T>.HasValue or Nullable<T> != null? The compiler replaces null comparisons with a call to HasValue, so there is no real d 阅读全文
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遇到这个问题,是因为存储过程的参数,设置默认值写错了。 错误写法 @WhiteIp NVARCHAR(MAX) NULL, Stored procedure with default parameters I wrote with parameters that are predefined The 阅读全文
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What size do you use for varchar(MAX) in your parameter declaration? In this case you use -1. See also MSDN docs: msdn.microsoft.com/en-us/library/bb3 阅读全文
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geek.exe https://geekuninstaller.com/download Event log message indicates that the Windows Installer reconfigured all installed applications Product: 阅读全文
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EvansClassification In his excellent book Domain Driven Design, Eric Evans creates a classification of the different kinds of domain objects that you' 阅读全文
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Catalog of Patterns of Enterprise Application Architecture Last Significant Update: January 2003 A short summary of the patterns in Patterns of Enterp 阅读全文
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ValueObject When programming, I often find it's useful to represent things as a compound混合物. A 2D coordinate consists of an x value and y value. An am 阅读全文
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What is Data Transfer Object? A Data Transfer Object is an object that is used to encapsulate data, and send it from one subsystem of an application t 阅读全文
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ASP.NET validation controls validate the user input data to ensure that useless, unauthenticated, or contradictory data don't get stored. ASP.NET prov 阅读全文