.netcore下Dapper helper类

 

 

using Dapper;
using Microsoft.Extensions.Configuration;
using MySql.Data.MySqlClient;
using System;
using System.Collections.Generic;
using System.Data;
using System.Text;
using System.Threading.Tasks;

namespace MyCommon.Repositories
{
  
    public interface IDbRepository
    {
        /// <summary>
        /// 查询数据
        /// </summary>
        /// <param name="sql"></param>
        /// <param name="param"></param>
        /// <returns></returns>
        Task<IEnumerable<dynamic>> QueryAsync(string sql, object param = null);

        /// <summary>
        /// 查询数据
        /// </summary>
        /// <param name="sql"></param>
        /// <param name="param"></param>
        /// <returns></returns>
        IEnumerable<dynamic> QueryDynamic(string sql, object param = null);

        /// <summary>
        /// 查询数据集合
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="sql"></param>
        /// <param name="param"></param>
        /// <returns></returns>
        IEnumerable<T> Query<T>(string sql, object param = null);

        /// <summary>
        /// 查询一条数据
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="sql"></param>
        /// <param name="param"></param>
        /// <returns></returns>
        T QueryFirstOrDefault<T>(string sql, object param = null);

        /// <summary>
        /// 查询数据是否存在
        /// </summary>
        /// <param name="sql"></param>
        /// <param name="param"></param>
        /// <returns></returns>
        bool QueryAny(string sql, object param = null);

        /// <summary>
        /// 执行非查询操作
        /// </summary>
        /// <param name="sql"></param>
        /// <param name="param"></param>
        /// <returns></returns>
        int Execute(string sql, object param = null);

        /// <summary>
        /// 
        /// </summary>
        /// <param name="sql"></param>
        /// <param name="param"></param>
        /// <returns></returns>
        object ExecuteScalar(string sql, object param = null);
    }

    /// <summary>
    /// 
    /// </summary>
    public class DbRepository : IDbRepository
    {
        private readonly IConfiguration _configuration;

        /// <summary>
        /// 数据库从库连接字符串
        /// </summary>
        public IDbConnection _dbConnectionSlave { get { return new MySqlConnection(_configuration["ConnectionStrings:SlaveConnectionRead"]); } }

        /// <summary>
        /// 数据库主库连接字符串
        /// </summary>
        public IDbConnection _dbConnectionMaster { get { return new MySqlConnection(_configuration["ConnectionStrings:MasterConnection"]); } }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="configuration"></param>
        public DbRepository(IConfiguration configuration)
        {
            _configuration = configuration;
        }

        /// <summary>
        /// 异步查询数据
        /// </summary>
        /// <param name="sql"></param>
        /// <param name="param"></param>
        /// <returns></returns>
        public async Task<IEnumerable<dynamic>> QueryAsync(string sql, object param = null)
        {
            using (_dbConnectionSlave)
            {
                return await _dbConnectionSlave.QueryAsync(sql, param);
            }
        }

        /// <summary>
        /// 查询数据
        /// </summary>
        /// <param name="sql"></param>
        /// <param name="param"></param>
        /// <returns></returns>
        public IEnumerable<dynamic> QueryDynamic(string sql, object param = null)
        {
            using (_dbConnectionSlave)
            {
                return _dbConnectionSlave.Query(sql, param);
            }
        }

        /// <summary>
        /// 查询数据集合
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="sql"></param>
        /// <param name="param"></param>
        /// <returns></returns>
        public IEnumerable<T> Query<T>(string sql, object param = null)
        {
            using (_dbConnectionSlave)
            {
                return _dbConnectionSlave.Query<T>(sql, param);
            }
        }

        /// <summary>
        /// 查询一条数据
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="sql"></param>
        /// <param name="param"></param>
        /// <returns></returns>
        public T QueryFirstOrDefault<T>(string sql, object param = null)
        {
            using (_dbConnectionSlave)
            {
                return _dbConnectionSlave.QueryFirstOrDefault<T>(sql, param);
            }
        }

        /// <summary>
        /// 查询数据是否存在
        /// </summary>
        /// <param name="sql"></param>
        /// <param name="param"></param>
        /// <returns></returns>
        public bool QueryAny(string sql, object param = null)
        {
            using (_dbConnectionSlave)
            {
                return _dbConnectionSlave.ExecuteScalar(sql, param) != null;
            }
        }

        /// <summary>
        /// 执行非查询操作
        /// </summary>
        /// <param name="sql"></param>
        /// <param name="param"></param>
        /// <returns></returns>
        public int Execute(string sql, object param = null)
        {
            using (_dbConnectionMaster)
            {
                return _dbConnectionMaster.Execute(sql, param);
            }
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="sql"></param>
        /// <param name="param"></param>
        /// <returns></returns>
        public object ExecuteScalar(string sql, object param = null)
        {
            using (_dbConnectionSlave)
            {
                return _dbConnectionSlave.ExecuteScalar(sql, param);
            }
        }
    }
}