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spring.net +dapper 打造简易的DataAccess 工具类.

發布時間：2023/10/11 编程问答 76 如意码农

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 public class DBUtil

     {

         /// <summary>

         /// 數據庫連接字符串

         /// </summary>

         private static string DataBase_Connection = System.Configuration.ConfigurationManager.ConnectionStrings["DNT"].ToString();

         /// <summary>

         /// 腳本文件存放路徑

         /// </summary>

         private static string Data_File_Path = System.Configuration.ConfigurationManager.AppSettings["Data_File_Path"].ToString();

         /// <summary>

         /// 全局配置文件列表

         /// </summary>

         public static Dictionary<string, DataConfig> DataConfigList;

         /// <summary>

         /// 加載配置文件

         /// </summary>

         public static void InitConfig()

         {

             var filePath =  Path.Combine(AppDomain.CurrentDomain.BaseDirectory,Data_File_Path);

             DirectoryInfo TheFolder = new DirectoryInfo(filePath);

             foreach (FileInfo NextFile in TheFolder.GetFiles().Where(f=>f.Extension == ".config"))

             {

                 Spring.Context.Support.XmlApplicationContext context = new Spring.Context.Support.XmlApplicationContext(NextFile.FullName);

                 string[] fileNames = context.ObjectFactory.GetObjectDefinitionNames();

                 foreach (var fileName in fileNames)

                 {

                     var mObj = context.GetObject(fileName);

                     if (DataConfigList == null)

                     {

                         DataConfigList = new Dictionary<string, DataConfig>();

                     }

                     string keyName = NextFile.Name.Split('.')[].ToString() + "." + fileName;

                     if (!DataConfigList.ContainsKey(keyName))

                     {

                         DataConfigList.Add(keyName, mObj as DataConfig);

                     }

                     else

                     {

                         throw new ApplicationException("The existence of multiple identical configuration node,plseae check!");

                     }

                 }

             }

         }

         /// <summary>

         /// 獲取指定名稱SQL

         /// </summary>

         /// <param name="commandName"></param>

         /// <returns></returns>

         public static string GetSql(string commandName)

         {

             InitConfig();

             if (!DataConfigList.ContainsKey(commandName))

             {

                 throw new ApplicationException("Data file can't be found!");

             }

             else

             {

                 return DataConfigList[commandName].commandText;

             }

         }

         /// <summary>

         /// 獲取數據庫連接

         /// </summary>

         /// <returns></returns>

         public static SqlConnection GetConnection()

         {

             SqlConnection connection = new SqlConnection(DataBase_Connection);

             connection.Open();

             return connection;

         }

         /// <summary>

         /// 獲取Command

         /// </summary>

         /// <param name="commandName"></param>

         /// <returns></returns>

         public static IDbCommand CreateCommand(string commandName)

         {

             var connection = GetConnection();

             using (IDbCommand command = connection.CreateCommand())

             {

                 command.CommandText = GetSql(commandName);

                 return command;

             }

         }

         /// <summary>

         /// 執行查詢動作

         /// </summary>

         /// <typeparam name="T"></typeparam>

         /// <param name="command"></param>

         /// <param name="pars"></param>

         /// <returns></returns>

         public static List<T> Query<T>(string commandName, dynamic pars)

         {

             using (IDbCommand command = DBUtil.CreateCommand(commandName))

             {

                 return SqlMapper.Query<T>(command.Connection, command.CommandText, pars);

             }

         }

     }

SQL配置文件管理

支持多文件 (Order.config, Item.config....), DBUtil 會在調用時加配置文件加入內存中緩存，待下次時候，直接讀取內存數據.

 <?xml version="1.0" encoding="utf-8" ?>

 <objects xmlns="http://www.springframework.net"

     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

     xsi:schemaLocation="http://www.springframework.net

         http://www.springframework.net/xsd/spring-objects.xsd">

   <object id="GetOrderList" type="SpringDemo.DataConfig,SpringDemo">

     <property name="commandText">

       <value>

         <![CDATA[

            SELECT TOP(@Size) * FROM dbo.Order

          ]]>

       </value>

     </property>

   </object>

 <object id="GetOrderDetail" type="SpringDemo.DataConfig,SpringDemo">

     <property name="commandText">

       <value>

         <![CDATA[

            SELECT TOP(@Size) * FROM dbo.OrderDetail WHERE OrderID = @OrderID

          ]]>

       </value>

     </property>

   </object>

 </objects>

Demo代碼

class Program

    {

        static void Main(string[] args)

        {

            List<Order> OrderList = GetOrderList();

            OrderList.ForEach(f =>

            {

                Console.WriteLine(f.OrderNumber);

            });

            Console.ReadLine();

        }

        public static List<Order> GetOrderLIST(int size)

        {

            return DBUtil.Query<Order>("Order.GetOrderList", new { Size = size }).ToList();

        }

       public static List<OrderDetail> GetOrderDetail(int size,int orderId)

        {

            return DBUtil.Query<OrderDetail>("Order.GetOrderDetail", new { Size = size,OrderID = orderId  }).ToList();

        }

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