LambdaToSql 发布兰姆达转换sql

文档目录索引

开源地址:https://gitee.com/wangshuyu/LambdaToSql

简介：

LambdaToSql 简单的兰姆达转换sql，可以直接.ToList()执行，返回查询结果

第一个版本支持：

Where 条件查询
Order by 排序
Group by 分组
简单分页，只支持row_number
支持数据库函数：Avg Max Min Sum Count
不需要任何第三方类库

使用前置条件：

主键必须是 Guid uniqueidentifier
表必须有 CreateTime datetime ，给分页排序使用，后期会把这个条件处理掉

第一个版不支持：

暂不支持事物处理
暂不支持多表join查询
只支持Microsoft SQL Server数据库,分页不支持SQL Server 2000

测试表Sql语句：

CREATE TABLE [dbo].[System_UserInfo](
    [Guid] [uniqueidentifier] NOT NULL CONSTRAINT [DF_UserInfo_Guid]  DEFAULT (newid()),
    [LoginName] [nvarchar](32) NULL,
    [UserName] [nvarchar](32) NULL,
    [PassWord] [nvarchar](64) NULL,
    [Cert] [uniqueidentifier] NULL,
    [IdCard] [nvarchar](64) NULL,
    [Birthday] [nvarchar](64) NULL,
    [Address] [nvarchar](1024) NULL,
    [ImgUrl] [nvarchar](128) NULL,
    [Gender] [nvarchar](2) NULL,
    [Mobile] [nvarchar](16) NULL,
    [Remark] [nvarchar](1024) NULL,
    [Unionid] [nvarchar](128) NULL,
    [CreateTime] [datetime] NULL CONSTRAINT [DF_UserInfo_CreaTime]  DEFAULT (getdate()),
    [IsDelete] [int] NULL,
    [CreateUserInfoID] [uniqueidentifier] NULL,
 CONSTRAINT [PK_USER] PRIMARY KEY NONCLUSTERED 
(
    [Guid] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]

GO

EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'用户ID' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'TABLE',@level1name=N'System_UserInfo', @level2type=N'COLUMN',@level2name=N'Guid'
GO

EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'登录名称' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'TABLE',@level1name=N'System_UserInfo', @level2type=N'COLUMN',@level2name=N'LoginName'
GO

EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'用户名' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'TABLE',@level1name=N'System_UserInfo', @level2type=N'COLUMN',@level2name=N'UserName'
GO

EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'密码' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'TABLE',@level1name=N'System_UserInfo', @level2type=N'COLUMN',@level2name=N'PassWord'
GO

EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'证件类型' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'TABLE',@level1name=N'System_UserInfo', @level2type=N'COLUMN',@level2name=N'Cert'
GO

EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'身份证号' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'TABLE',@level1name=N'System_UserInfo', @level2type=N'COLUMN',@level2name=N'IdCard'
GO

EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'出生日期' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'TABLE',@level1name=N'System_UserInfo', @level2type=N'COLUMN',@level2name=N'Birthday'
GO

EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'地址' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'TABLE',@level1name=N'System_UserInfo', @level2type=N'COLUMN',@level2name=N'Address'
GO

EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'头像' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'TABLE',@level1name=N'System_UserInfo', @level2type=N'COLUMN',@level2name=N'ImgUrl'
GO

EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'性别' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'TABLE',@level1name=N'System_UserInfo', @level2type=N'COLUMN',@level2name=N'Gender'
GO

EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'手机号' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'TABLE',@level1name=N'System_UserInfo', @level2type=N'COLUMN',@level2name=N'Mobile'
GO

EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'备注' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'TABLE',@level1name=N'System_UserInfo', @level2type=N'COLUMN',@level2name=N'Remark'
GO

EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'微信登录唯一码' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'TABLE',@level1name=N'System_UserInfo', @level2type=N'COLUMN',@level2name=N'Unionid'
GO

EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'创建时间' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'TABLE',@level1name=N'System_UserInfo', @level2type=N'COLUMN',@level2name=N'CreateTime'
GO

EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'是否删除' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'TABLE',@level1name=N'System_UserInfo', @level2type=N'COLUMN',@level2name=N'IsDelete'
GO

EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'创建人ID' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'TABLE',@level1name=N'System_UserInfo', @level2type=N'COLUMN',@level2name=N'CreateUserInfoID'
GO

EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'用户表' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'TABLE',@level1name=N'System_UserInfo'
GO

View Code

测试实体：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.Text;
using LambdaToSql;
using LambdaToSql.FrameWork;
using LambdaToSql.Extended;

namespace EntityModel
{

    /// <summary>
    /// 用户表
    /// </summary>
    [Serializable]
    [DataContract]
    public class System_UserInfo
    {

        /// <summary>
        /// 用户ID
        /// </summary>
        [DataMember]
        public System.Guid Guid { get; set; }

        /// <summary>
        /// 登录名称
        /// </summary>
        [DataMember]
        public string LoginName { get; set; }

        /// <summary>
        /// 用户名
        /// </summary>
        [DataMember]
        public string UserName { get; set; }

        /// <summary>
        /// 密码
        /// </summary>
        [DataMember]
        public string PassWord { get; set; }

        /// <summary>
        /// 证件类型
        /// </summary>
        [DataMember]
        public Nullable<System.Guid> Cert { get; set; }

        /// <summary>
        /// 身份证号
        /// </summary>
        [DataMember]
        public string IdCard { get; set; }

        /// <summary>
        /// 出生日期
        /// </summary>
        [DataMember]
        public string Birthday { get; set; }

        /// <summary>
        /// 地址
        /// </summary>
        [DataMember]
        public string Address { get; set; }

        /// <summary>
        /// 头像
        /// </summary>
        [DataMember]
        public string ImgUrl { get; set; }

        /// <summary>
        /// 性别
        /// </summary>
        [DataMember]
        public string Gender { get; set; }

        /// <summary>
        /// 手机号
        /// </summary>
        [DataMember]
        public string Mobile { get; set; }

        /// <summary>
        /// 备注
        /// </summary>
        [DataMember]
        public string Remark { get; set; }

        /// <summary>
        /// 微信登录唯一码
        /// </summary>
        [DataMember]
        public string Unionid { get; set; }

        /// <summary>
        /// 创建时间
        /// </summary>
        [DataMember]
        public Nullable<System.DateTime> CreateTime { get; set; }

        /// <summary>
        /// 是否删除
        /// </summary>
        [DataMember]
        public Nullable<int> IsDelete { get; set; }

        /// <summary>
        /// 创建人ID
        /// </summary>
        [DataMember]
        public Nullable<System.Guid> CreateUserInfoID { get; set; }
    }
}

View Code

测试代码，具体查看后续文章：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using LambdaToSql.FrameWork;

namespace Web
{
    public partial class Clent : System.Web.UI.Page
    {
        LambdaToSql.SqlClient DB = new LambdaToSql.SqlClient();

        protected void Page_Load(object sender, EventArgs e)
        {
            //生成实体对象文件
            //LambdaToSql.SysConfig.Init();
            //LambdaToSql.Fireworks.CreateEntity.Init("d:/class/");

            //Find查询主键
            //var obj = db.QueryTable<EntityModel.System_UserInfo>().Find(Guid.Parse("9c1d1247-cd2c-424d-be14-ef8abae655a4"));


            //var item = new string[] { "15842709668", "18609877687", "15804279711", "13998756128", "13019965033" }.ToList();
            //var list = db.QueryTable<EntityModel.System_UserInfo>(ex => LambdaToSql.Fireworks.Method.In(ex.LoginName, item)).ToList();
            //var list = db.QueryTable<EntityModel.System_UserInfo>(ex => item.Contains(ex.LoginName)).ToList();

            function();
            Select();
        }

        private void function() //函数查询
        {           
            var list = DB.QueryTable<EntityModel.System_UserInfo>()
                //.Where(ex => ex.LoginName.Contains("15"))
                //.Where(ex => ex.LoginName.StartsWith("158"))
                //.Where(ex => ex.LoginName.EndsWith("88"))
                //.Where(ex => ex.LoginName.NotContains("88"))
                //.Where(ex => ex.LoginName == "Shuyu".ToLower())
                // .Where(ex => item.Contains(ex.LoginName))
                //.Where(ex => item.NotContains(ex.LoginName))
                .ToList();
        }

        private void Select()//基本查询 分页 
        {
            int total = 0;
            var list = DB.QueryTable<EntityModel.System_UserInfo>()
                    //.Select(ex => new { ex.LoginName, ex.UserName })
                    //.Select(ex => new { ex.PassWord, ex.IdCard })
                    //.Where(ex => ex.LoginName == "test" || ex.UserName == "社区民警")
                    //.Where(ex => ex.LoginName == "test")
                    //.GroupBy(ex => new { ex.LoginName })
                    //.GroupBy(ex => new { ex.UserName })
                    //.OrderByDescending(ex => ex.LoginName)
                    //.OrderBy(ex => ex.UserName)
                    //.Take(15)
                    //.Where(ex => ex.LoginName.Contains("15"))
                    //.Where(ex => ex.LoginName.StartsWith("158"))
                    //.Where(ex => ex.LoginName.EndsWith("88"))
                    //.Where(ex => ex.LoginName.NotContains("88"))
                    //.Where(ex => ex.LoginName == "Shuyu".ToLower())

                    //.Where(ex => Method.Like(ex.LoginName, "158%"))
                    //.Where(ex => Method.NotLike(ex.LoginName, "158%"))

                    //.Where(ex => Method.In(ex.LoginName, "15841479211"))
                    //.Where(ex => Method.In(ex.LoginName, item))
                    //.Where(ex => Method.NotIn(ex.LoginName, item))

                    //.Count();
                    //.Take(10)
                    //.Skip(2)
                    //.OrderBy(ex => ex.CreateTime)
                    //.Sum(ex => ex.LogOnCount);
                    //.Min(ex => ex.LogOnCount);
                    //.Max(ex => ex.LogOnCount);
                    //.Avg(ex => ex.LogOnCount);
                    //.First();
                    //.FirstOrDefault();
                    //.ToPageList(3, 15, ref total);
                    .ToList();
        }
    }
}

View Code

Web.config配置文件

<connectionStrings>
   <add name="ConnectionString" connectionString="Server=.;Database=Test;User ID=sa;Password=123456" providerName="System.Data.SqlClient" />
</connectionStrings>

性能：

基本和Ado.Net原生接近,lambda解析转换成sql语句，然后使用DBHelper参数化查询的数据库，性能损耗是在兰姆达转语句上，后续版本会加缓存机制。
暂时不支持事物处理
接口命名重新规划，但还是不太好，后续版本会慢慢规划，暂时预计大概发布 10个版本，出一个稳定版本
稳定后会开源出来哈哈

如何获取：

NuGet管理器搜索：LambdaToSql
Install-Package LambdaToSql -Version 版本号

使用示例：

配置文件中添加链接数据库字符串 <add name="ConnectionString" connectionString="Server=.;Database=test;User ID=sa;Password=123456" providerName="System.Data.SqlClient" />
使用实例

DB.QueryTable<实体对象>()
.Where(条件)
.Select(字段)
.GroupBy(分组)
.OrderByDescending(排序)
.OrderBy(排序)
.Skip(页码)
.Take(数量)
.ToList();//返回集合

.Count();
.Sum(求和);
.Min(最小值);
.Max(最大值);
.Avg(平均值);
.First();//第一条
.FirstOrDefault();//第一条
.ToPageList(页码, 每页数量, ref 总数);//分页
其它

最后感谢:SqlSugar 作者开源

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原文地址：https://www.cnblogs.com/shuyu/p/7489858.html

LambdaToSql 发布 兰姆达转换sql

文档目录索引

LambdaToSql 发布兰姆达转换sql