PDF.NET数据开发框架实体类操作实例

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <connectionStrings>
    <!--<add name ="default" connectionString ="server=192.168.50.41;User Id=root;password=hisun;database=test" providerName="PWMIS.DataProvider.Data.MySQL,PWMIS.MySqlClient"/>-->
    <add name ="default" connectionString ="server=127.0.0.1;User Id=postgres;password=hisun;database=Test" providerName="PWMIS.DataProvider.Data.PostgreSQL,PWMIS.PostgreSQLClient"/>
  </connectionStrings>
</configuration>

/*
 * PDF.NET 数据开发框架
 * http://www.pwmis.com/sqlmap
 */
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using PWMIS.DataMap.Entity;
namespace TestMySqlEntity
{
    class User:EntityBase 
    {
        public User()
        {
            TableName = "tb_user";
            PrimaryKeys.Add("ID");//主键
            //IdentityName = "ID";//标识，自增
            PropertyNames = new string[] {"ID","Name","Age" };
            PropertyValues = new object[PropertyNames.Length];
        }
        public int ID
        {
            get { return getProperty<int>("ID"); }
            set { setProperty("ID", value); }
        }
        public int Age
        {
            get { return getProperty<int>("Age"); }
            set { setProperty("Age", value); }
        }
        public string Name
        {
            get { return getProperty<string>("Name"); }
            set { setProperty("Name", value,50); }
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using PWMIS.DataMap.Entity;
using System.Data;
namespace TestMySqlEntity
{
    class Program
    {
        static void Main(string[] args)
        {
            PWMIS.DataProvider.Data.AdoHelper db = PWMIS.DataProvider.Adapter.MyDB.GetDBHelperByConnectionName("default");
            //PWMIS.DataProvider.Data.AdoHelper db = PWMIS.DataProvider.Adapter.MyDB.Instance ;
            //MySQL 存储过程测试;
            //参数名字可以加 @符号，例如 @pAge1
            //DataSet ds1= db.ExecuteDataSet("proc_user1", 
            //    CommandType.StoredProcedure,
            //    new System.Data.IDataParameter[] { db.GetParameter ("@pAge1",22) });
            
            //
            User u = new User();
            //*************构建 OQL 查询表达式 ******* begin ************
            //查询实体集合
            //使用 OQLCompare 对象作为条件
            //OQL q = OQL.From(u).Select().Where(new OQLCompare(u).Comparer(u.Age, OQLCompare.CompareType.NoSmaller, 15)).END ;
            OQL q = new OQL(u);
            //使用OQL2 作为条件对象
            q.Select().Where(q.Condition.AND(u.Age, ">=", 15)).OrderBy (u.Age ,"asc");
            //使用 QueryParameter 数组作为条件，适合于多个并列的And条件
            //q.Select().Where(new QueryParameter[] { new QueryParameter("Age", PWMIS.Common.enumCompare.NoSmaller, 15) }).OrderBy(u.Age, "asc"); 
            Console.WriteLine("OQL to SQL:rn"+q.ToString ());
            
            //*************构建 OQL 查询表达式 ******* end ************
            //查询实体列表
            var result = EntityQuery<User>.QueryList(q);
            Console.WriteLine("查询实体集合成功，数量："+result .Count );
            Console.WriteLine("rnExecuted SQL Text:rn{0}rn", PWMIS.DataProvider.Data.CommandLog.Instance.CommandText);
            //查询单个实体
            u.Name = "zhang san";
            q.Select().Where(u.Name);
            Console.WriteLine("OQL to SQL:rn" + q.ToString());
            User u1 = EntityQuery<User>.QueryObject(q);
            if (u1 != null)
                Console.WriteLine("查询单个实体成功！");
            Console.WriteLine("rnExecuted SQL Text:rn{0}rn", PWMIS.DataProvider.Data.CommandLog.Instance.CommandText);

            //直接使用EntityQuery<T>.Instance 属性的插入、修改、删除方法
            u.Name = "li si3";
            u.Age = 15;
            if (EntityQuery<User>.Instance.Insert(u) > 0)
                Console.WriteLine("插入实体成功！"); //将自动为ID属性赋值
            Console.WriteLine("rnExecuted SQL Text:rn{0}rn", PWMIS.DataProvider.Data.CommandLog.Instance.CommandText);
            //PostgreSQL 没有 @@IDENTITY 变量，所以无法拿到刚才的自增值，注释掉下面的修改方法
            //u.Age = 25;
            //if (EntityQuery<User>.Instance.Update (u) > 0)
            //    Console.WriteLine("修改实体成功！");
            //Console.WriteLine("rnExecuted SQL Text:rn{0}rn", PWMIS.DataProvider.Data.CommandLog.Instance.CommandText);
            User u2 = new User();
            u2.Name = "wang wu";
            u2.Age = 20;
            //使用EntityQuery<T> 的实例对象方法更新实体
            //只会更新赋值过的属性值
            EntityQuery<User> eq = new EntityQuery<User>(u2);
            if (eq.SaveAllChanges() > 0)
                Console.WriteLine("更新实体成功！");
            Console.WriteLine("rnExecuted SQL Text:rn{0}rn", PWMIS.DataProvider.Data.CommandLog.Instance.CommandText);
            Console.Read();
        }
    }
}