EntLib5.0 DAAB(Data Access Application Block),数据访问程序块 简单示例

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http://entlib.codeplex.com/

Entlib5.0 要求.net framework3.5 sp1,或 .net framework 4.0

App.config:

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

<configuration>

    <configSections>

        <section name="dataConfiguration" type="Microsoft.Practices.EnterpriseLibrary.Data.Configuration.DatabaseSettings, Microsoft.Practices.EnterpriseLibrary.Data, Version=5.0.414.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" requirePermission="true" />

    </configSections>

    <dataConfiguration defaultDatabase="DbConnString" />

    <connectionStrings>

        <add name="DbConnString" connectionString="Data Source=myip;Initial Catalog=Test;User Id=sa;Password=MyPwd;"

            providerName="System.Data.SqlClient" />

      <add name="DbConnString182" connectionString="Data Source=myAnotherIP;Initial Catalog=DbName;User Id=User;Password=MyPwd"

            providerName="System.Data.SqlClient" />

    </connectionStrings>

</configuration>

　　

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using Microsoft.Practices.EnterpriseLibrary.Data;

using Microsoft.Practices.EnterpriseLibrary.Data.Sql;

using System.Data.Common;

using System.Data;



namespace TestEntLib5_0InFramework3_5

{

    class Program

    {

        static void Main(string[] args)

        {

            Database db = DatabaseFactory.CreateDatabase();         //创建一个默认的数据库对象



            //Database db = DatabaseFactory.CreateDatabase("DbConnString182");      //创建一个命名的数据库对象



            //1.ExecuteNonQuery

            /*

            DbCommand dbCmd = db.GetSqlStringCommand(

                @"INSERT INTO T_EntLib (name,birthday,email) VALUES(N'吴1','2008-12-23','[email protected]');

                INSERT INTO T_EntLib (name,birthday,email) VALUES(N'吴2','2008-12-23','[email protected]');

                INSERT INTO T_EntLib (name,birthday,email) VALUES(N'吴3','2008-12-23','[email protected]');

                INSERT INTO T_EntLib (name,birthday,email) VALUES(N'吴4','2008-12-23','[email protected]');

                INSERT INTO T_EntLib (name,birthday,email) VALUES(N'吴5','2008-12-23','[email protected]');");

            int iAffectedNum = db.ExecuteNonQuery(dbCmd);           //返回影响的条数

            Console.WriteLine(iAffectedNum);

            */



            //2. ExecuteDataSet自动开启关闭Connection 



            //var sql = "SELECT TOP 10 * FROM sys_draw ORDER BY id DESC";

            /*

            var sql = "SELECT * FROM T_EntLib";



            DbCommand cmd = db.GetSqlStringCommand(sql);



            //  No need to open the connection; just make the call.

            //	执行时监视：cmd.Connection.State

            DataSet ds = db.ExecuteDataSet(cmd);

            //在此处发现：cmd.Connection.State	Closed	System.Data.ConnectionState

            //说明自动关闭连接

            Console.WriteLine(ds.Tables[0].Rows.Count);

            int col = ds.Tables[0].Columns.Count;

            foreach (DataRow dr in ds.Tables[0].Rows)

            {

                for (int i = 0; i < col; i++)

                {

                    Console.Write(dr[i].ToString());

                }

                Console.WriteLine();

            }

            */



            //3:ExecuteReader

            /**

             * If the Data Access Application Block methods close the connection before returning the DbDataReader,

             * the DbDataReader becomes useless to the client code. Instead, the DbDataReader methods indicate 

             * to the underlying ADO.NET call to automatically close the connection when the DbDataReader is disposed. 

             * 

             * */

            /*

            var sql = "SELECT * FROM T_EntLib";

            DbCommand cmd = db.GetSqlStringCommand(sql);

            using (IDataReader reader = db.ExecuteReader(cmd))

            {

                int col = reader.FieldCount;

                while (reader.Read())

                {

                    for (int i = 0; i < col; i++)

                    {

                        Console.Write(reader[i].ToString());

                    }

                    Console.WriteLine();

                }

            } //在此处之后，发现 cmd.Connection.State 自动变为Closed.

            */



            //4: Retrieving Data as Objects 

           



            var sql = "SELECT * FROM T_EntLib";



            //var result = db.ExecuteSqlStringAccessor<Info>(sql);       //使用默认的RowMapper



            IRowMapper < Info > rowMapper = MapBuilder<Info>.MapAllProperties()

                               .MapByName(x => x.NAME)

                               .DoNotMap(x => x.Email)

                               .DoNotMap(x=>x.Birthday)

                               .Build();

            var result = db.ExecuteSqlStringAccessor<Info>(sql, rowMapper);  //使用自定义的RowMapper



            foreach (var item in result)

            {

                Console.WriteLine("ID={0},Name:{1},Birthday:{2},Email:{3}", item.Id, item.NAME, item.Birthday, item.Email);

            }

            Console.ReadKey();

        }

    }

}

　　

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;



namespace TestEntLib5_0InFramework3_5

{

    public class Info

    {

        public int Id { get; set; }

        public string NAME { get; set; }

        public string Email { get; set; }

        public DateTime Birthday { get; set; }

    }

}

　　

CREATE TABLE T_EntLib

(

	ID bigint IDENTITY,

	NAME nvarchar(50),

	Birthday datetime,

	Email varchar(50)

)

 http://files.cnblogs.com/wucg/TestEntLib5_0InFramework3_5.zip