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README
MIT

Lambda表达式转SQL语句类库

一、可以达到的功能

本功能类库主要提供给代码中使用Lambda表达式,后需转成SQL的条件语句这一需求

二、不能做的

1、本类库不能解析Linq语句

2、不能解析SQL中的Select部分

例1:

  class A
{
    public Int16 Id { get; set; }
    public string name { get; set; }
    public string sex { get; set; }
}
AtkExpConditions<A> expa = new AtkExpConditions<A>();
expa.AddAndWhere(s => s.Id == 123 && s.name.Contains("a"), AtkAlias.a2);
expa.UpdateFields(s => new { s.Id, s.sex }, AtkAlias.a2);

结果生成下列两个语句:
1、Where (([a2].[Id] = 123) and ([a2].[name] LIKE '%' + 'a' + '%'))
2、[a2].[Id] = @Id,[a2].[sexA] = @sex

例2:

    // 当需要多子句拼接时,自动合并成合适的子句,如 Where ,不会出现多个“where”关键词。
    // When multiple clauses are required to be spliced, 
    // they are automatically merged into appropriate clauses, 
    // such as Where, without multiple "Where" keywords.
    AtkExpConditions<A> expa2 = new AtkExpConditions<A>();

    if (1==1)
    {
	    expa2.AddAndWhere(s => s.Id == 123);
    }

    if (2==2)
    {
	    expa2.AddAndWhere(s => s.name.Contains("a"));
    }

结果生成下列两个语句:
Where ([a0].[Id] = 123) And ([a0].[name] LIKE '%' + 'a' + '%')

QQ:344709752

MIT License Copyright (c) 2018 athinker Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

简介

Expression To Sql Statement 表达式转SQL语句 展开 收起
C#
MIT
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