簡單體驗一個高性能，簡單，輕量的ORM庫- Dapper (無依賴其它庫，非常方便高效)

步驟1)引入該ORM庫。

        使用Nuget搜索"Dapper"安裝或者直接從github上下載源碼  (https://github.com/StackExchange/Dapper) 集成到項目中。

步驟2)初始化數據庫連接配置.

        

using MySql.Data.MySqlClient;
using System;
using System.Collections.Generic;
using System.Data;
using System.Data.SqlClient;
using System.Text;

namespace CoreLab.DAL.Base
{
    /// <summary>
    /// 功能簡介：基於Dapper這個orm框架的數據庫訪問對象
    /// 創建時間：2020-8-11
    /// 創建人：ww
    /// </summary>
    public class DBaseForDapper
    {
        public static IDbConnection dbConnect_GmUser
        {
            get
            {
                return new MySqlConnection(SqlConnectManager.Instance.SqlConnectStr_Gateway);//SqlConnection默認是Sqlserver的,他們都實現了IDbConnnection
            }
        }
    }
}

步驟3)從簡單的CRUD來體驗Dapper( 由於僅用於體驗用法，因此直接寫在controller中了).

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using CoreLab.Model.ListPageModel;
using CoreLab.Model.Configs;
using Microsoft.Extensions.Options;
using Microsoft.AspNetCore.Http;
using System.Net.Http.Headers;
using System.IO;
using Microsoft.AspNetCore.Hosting;using Newtonsoft.Json;using System.Text;
using CoreLab.DAL;
using CoreLab.DAL.Base;
using Dapper;
using System.Data;namespace CoreLab.Web.Controllers
{
    /// <summary>
    /// 功能簡介：本控制器內的代碼僅用於快速測試.
    /// 創建時間：2020-8-11
    /// 創建人：ww
    /// </summary>
    public class DemoController : BaseController
    {
     
        public string DapperTest_Add(string CardTypeId,string CardTypeName)
        {
            try
            {
                E_CardType eCardType = new E_CardType() { CardTypeId = CardTypeId, CardTypeName = CardTypeName, CreateTime = DateTime.Now, EnableStatus = 1 };
                using (IDbConnection dbConnection = DBaseForDapper.dbConnect_GmUser)
                {
                    int iReturn = dbConnection.Execute("insert into tb_cardtype(CardTypeId,CardTypeName,EnableStatus) values(@CardTypeId,@CardTypeName,@EnableStatus)", eCardType);
                    return iReturn.ToString();
                }
            }
            catch(Exception ex)
            {

            }
            return "-1";
        }
        public IActionResult DapperTest_QueryList()
        {
            try
            {
                using (IDbConnection dbConnection = DBaseForDapper.dbConnect_GmUser)
                {
                    IList<E_CardType> listCardType = dbConnection.Query<E_CardType>("select * from tb_cardtype",null).ToList();
                    return new JsonResult(listCardType);
                }
            }
            catch (Exception ex)
            {

            }
            return new JsonResult(null);
        }
        public IActionResult DapperTest_QueryEntity(string CardTypeId)
        {
            try
            {
                using (IDbConnection dbConnection = DBaseForDapper.dbConnect_GmUser)
                {
                    //如果是in  @ids 則對應一個數組而不是對象。
                    IEnumerable<E_CardType> listCardType = dbConnection.Query<E_CardType>("select * from tb_cardtype where CardTypeId=@CardTypeId", new E_CardType() {  CardTypeId= CardTypeId });
                    if (listCardType != null && listCardType.Count() > 0)
                    {
                        return new JsonResult(listCardType.First());
                    }
                    return  new JsonResult(null);
                }
            }
            catch (Exception ex)
            {

            }
            return new JsonResult(null);
        }
        public string DapperTest_Update(string CardTypeId, int EnableStatus)
        {
            try
            {
                using (IDbConnection dbConnection = DBaseForDapper.dbConnect_GmUser)
                {
                    int iReturn = dbConnection.Execute($"update tb_cardtype set EnableStatus={EnableStatus} where CardTypeId=@CardTypeId", 
                        new E_CardType() { CardTypeId=CardTypeId });
                    return iReturn.ToString();
                }
            }
            catch (Exception ex)
            {

            }
            return "-1";
        }

        public string DapperTest_Delete(string CardTypeId)
        {
            try
            {
                using (IDbConnection dbConnection = DBaseForDapper.dbConnect_GmUser)
                {
                    int iReturn = dbConnection.Execute($"delete from tb_cardtype  where CardTypeId=@CardTypeId",
                        new E_CardType() { CardTypeId = CardTypeId });
                    return iReturn.ToString();
                }
            }
            catch (Exception ex)
            {

            }
            return "-1";
        }
    }
    /// <summary>
    /// 游戲卡類型
    /// </summary>
    public class E_CardType
    {
        public string CardTypeId { get; set; }
        public string CardTypeName { get; set; }
        public DateTime CreateTime { get; set; }
        public int EnableStatus { get; set; }
    }
}