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  • LINQ/EF/Lambda 比较字符串日期时间大小

    在使用EF时,想要比较字符串类型的日期时,参考以下:

    SQL语句:

    1)select * from TableName where StartTime > '2015-04-08'
    2)select * from TableName where StartTime >= '2015-04-08'
    3)select * from TableName where StartTime < '2015-04-08'
    4)select * from TableName where StartTime <= '2015-04-08'
    

    Lambda寫法:

    1).Where(a => a.StartTime.CompareTo('2015-04-08') > 0)
    2).Where(a => a.StartTime.CompareTo('2015-04-08') >= 0)
    3).Where(a => a.StartTime.CompareTo('2015-04-08') < 0)
    4).Where(a => a.StartTime.CompareTo('2015-04-08') <= 0)
    

    更规范的写法:

    1).Where(a => String.Compare(a.StartTime, '2015-04-08', StringComparison.Ordinal) > 0)
    2).Where(a => String.Compare(a.StartTime, '2015-04-08', StringComparison.Ordinal) >= 0)
    3).Where(a => String.Compare(a.StartTime, '2015-04-08', StringComparison.Ordinal) < 0)
    4).Where(a => String.Compare(a.StartTime, '2015-04-08', StringComparison.Ordinal) <= 0)
    

    本文来自:http://www.itdos.com/CSharp/20150408/0127321.html 转载请保留此链接,谢谢!

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  • 原文地址:https://www.cnblogs.com/keepee/p/6120785.html
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