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','a@qq.com');
                INSERT INTO T_EntLib (name,birthday,email) VALUES(N'吴2','2008-12-23','gga@qq.com');
                INSERT INTO T_EntLib (name,birthday,email) VALUES(N'吴3','2008-12-23','a@qq.com');
                INSERT INTO T_EntLib (name,birthday,email) VALUES(N'吴4','2008-12-23','a@qq.com');
                INSERT INTO T_EntLib (name,birthday,email) VALUES(N'吴5','2008-12-23','a@qq.com');");
            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)
)

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