Dapper数据操作层使用

using System;
using System.Collections.Generic;
using System.Configuration;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Dapper;
using System.Data.SqlClient;
using System.Data;
namespace YuPen.DAL
{
    public class DapperHelper<T> where T : class
    {
        /// <summary>
        /// 数据库连接字符串
        /// </summary>
        public static readonly string connectionString = ConfigurationManager.ConnectionStrings["ConString"].ConnectionString;
        /// <summary>
        /// 查询列表
        /// </summary>
        /// <param name="sql">查询的sql</param>
        /// <param name="param">替换参数</param>
        /// <returns></returns>
        public static List<T> Query(string sql, object param)
        {
            using (SqlConnection con = new SqlConnection(connectionString))
            {
                return con.Query<T>(sql, param).ToList();
            }
        }
        /// <summary>
        /// 查询第一个数据
        /// </summary>
        /// <param name="sql"></param>
        /// <param name="param"></param>
        /// <returns></returns>
        public static T QueryFirst(string sql, object param)
        {
            using (SqlConnection con = new SqlConnection(connectionString))
            {
                return con.QueryFirst<T>(sql, param);
            }
        }
        /// <summary>
        /// 查询第一个数据没有返回默认值
        /// </summary>
        /// <param name="sql"></param>
        /// <param name="param"></param>
        /// <returns></returns>
        public static T QueryFirstOrDefault(string sql, object param)
        {
            using (SqlConnection con = new SqlConnection(connectionString))
            {
                return con.QueryFirstOrDefault<T>(sql, param);
            }
        }
        /// <summary>
        /// 查询单条数据
        /// </summary>
        /// <param name="sql"></param>
        /// <param name="param"></param>
        /// <returns></returns>
        public static T QuerySingle(string sql, object param)
        {
            using (SqlConnection con = new SqlConnection(connectionString))
            {
                return con.QuerySingle<T>(sql, param);
            }
        }
        /// <summary>
        /// 查询单条数据没有返回默认值
        /// </summary>
        /// <param name="sql"></param>
        /// <param name="param"></param>
        /// <returns></returns>
        public static T QuerySingleOrDefault(string sql, object param)
        {
            using (SqlConnection con = new SqlConnection(connectionString))
            {
                return con.QuerySingleOrDefault<T>(sql, param);
            }
        }
        /// <summary>
        /// 曾删改
        /// </summary>
        /// <param name="sql"></param>
        /// <param name="param"></param>
        /// <returns></returns>
        public static int Execute(string sql, object param)
        {
            using (SqlConnection con = new SqlConnection(connectionString))
            {
                return con.Execute(sql, param);
            }
        }
        /// <summary>
        /// Reader获取数据
        /// </summary>
        /// <param name="sql"></param>
        /// <param name="param"></param>
        /// <returns></returns>
        public static IDataReader ExecuteReader(string sql, object param)
        {
            using (SqlConnection con = new SqlConnection(connectionString))
            {
                return con.ExecuteReader(sql, param);
            }
        }
        /// <summary>
        /// Scalar获取数据
        /// </summary>
        /// <param name="sql"></param>
        /// <param name="param"></param>
        /// <returns></returns>
        public static object ExecuteScalar(string sql, object param)
        {
            using (SqlConnection con = new SqlConnection(connectionString))
            {
                return con.ExecuteScalar(sql, param);
            }
        }
        /// <summary>
        /// Scalar获取数据
        /// </summary>
        /// <param name="sql"></param>
        /// <param name="param"></param>
        /// <returns></returns>
        public static T ExecuteScalarForT(string sql, object param)
        {
            using (SqlConnection con = new SqlConnection(connectionString))
            {
                return con.ExecuteScalar<T>(sql, param);
            }
        }

        /// <summary>
        /// 带参数的存储过程
        /// </summary>
        /// <param name="sql"></param>
        /// <param name="param"></param>
        /// <returns></returns>
        public static List<T> ExecutePro(string proc, object param)
        {
            using (SqlConnection con = new SqlConnection(connectionString))
            {
                List<T> list = con.Query<T>(proc,
                                            param,
                                            null,
                                            true,
                                            null,
                                            CommandType.StoredProcedure).ToList();
                return list;
            }
        }
    }
}

Dapper文件下载

https://files.cnblogs.com/files/huweizhong/Dapper.zip