Extend ado Net to realize object-oriented CRUD (.Net core/framework)

Expand ADO.net Realization of objectification CRUD(.net core/framework)

1. <u> install nuget package ：CRL</u>
2. <u>using CRL;</u>

Realize data operation

Get data access connection IDbConnection dbConnection

By extending the method **GetDBExtend** obtain IAbsDBExtend object

    public IAbsDBExtend GetDBExtend()

    {

        return dbConnection.GetDBExtend(dbTrans);

    }

Use IAbsDBExtend Implementation of object-oriented operation

var db = GetDBExtend();

db.BatchInsert(new List<TestClass>() { new TestClass() { Id = DateTime.Now.Millisecond, Name = "ddddd" } },true);

db.Update(b => b.Id == 1, new { Number = 2 });

**IAbsDBExtend** All data operations can be realized , Such as ：

1. Batch update
2. Batch deletion
3. Batch insert
4. stored procedure
5. Table field 、 The index inspection

Implement query

By extending the method **GetLambdaQuery<T>** obtain ILambdaQuery object

public ILambdaQuery<T> GetLambdaQuery<T>() where T : class

        {

            return dbConnection.GetLambdaQuery<T>(dbTrans);

        }

Use ILambdaQuery Implement query

var query = GetLambdaQuery<TestClass>();

                query.Join<TestClass2>((a, b) => a.Id == b.Id);

                query.PrintQuery();

<u>ILambdaQuery It can realize sub query and nested query , As long as meet T-SQL Semantic logic , have access to ILambdaQueryResultSelect Infinite superposition </u>

Such as ：

• join after group
• join Later join
• group Later join
• join One group result
• join One union result
• Yes union Conduct group Again join
• ...

** Sample query :**

var q1 = GetLambdaQuery();

            var q2 = q1.CreateQuery<Code.ProductData>();

            q2.Where(b => b.Id > 0);

            var view = q2.CreateQuery<Code.Member>().Where(b => b.Id > 0).GroupBy(b => b.Name).Select(b => new { b.Name, aa = b.Id.COUNT() });//GROUP Inquire about 

            var view2 = q2.Join(view, (a, b) => a.CategoryName == b.Name).Select((a, b) => new { ss1 = a.UserId, ss2 = b.aa });// relation GROUP

            q1.Join(view2, (a, b) => a.Id == b.ss1).Select((a, b) => new { a.Id, b.ss1 }).ToList();// Again 

            //var result = view2.ToList();

            var sql = q1.PrintQuery();

Source code example reference

Data/QueryTest/test · hubroxxl/CRL - Code cloud - Open source in China (gitee.com)