c# dapper的简单使用

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Data;
using System.Data.SqlClient;
using Dapper;

namespace DAL
{
    public class DapperHelper : Absconnection, IDal
    {
        IDbConnection conn = Absconnection.dbConnection();
        /// <summary>
        /// 增删改
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="sql"></param>
        /// <returns></returns>
        public int Excout<T>(string sql) where T : class, new()
        {
            return conn.Execute(sql);
        }
        /// <summary>
        /// 查询
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="sql"></param>
        /// <returns></returns>
        public List<T> Query<T>(string sql) where T : class, new()
        {
            return conn.Query<T>(sql).ToList();
        }
    }
}

连接两个接口Absconnection和IDal

Absconnection是连接字符串

IDal是接口泛型方法，用于调用