自己写数据库访问ORM

目前，往上有很多优秀的ORM,但和Csla紧密结合还没找到合适的。出于需要，自己动手写了一个。主要优点在于，实现了直接通过DataReader填充业务类数据。IF使用简单，只要在业务类上标记特性TableClass、FieldDescription即可将业务类和数据库建立映射关系。

下面看一个例子：

现在有一个用户信息的表：E-R图如下：

要实现该表的数据库新增、修改、查询功能，需要实现下面两个业务类：

using Csla;
using IF.CslaCore;
using IF.OrmCore.DataSchema;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace IF.SysUser.Business
{
    [Serializable]
    [TableClass(FriendlyName="用户信息表",TableName="SYS_USER")]
    public class SysUser : IfBusiness<SysUser>
    {
        private static readonly PropertyInfo<string> SUR_IDProperty = RegisterProperty<string>(c => c.SUR_ID);

        [DisplayName("SUR_ID")]
        [FieldDescription(IsPrimaryKey=true,ColumnName="SUR_ID",FriendlyName="SUR_ID",NeedUpdate=true)]
        public string SUR_ID { get; set; }

        private static readonly PropertyInfo<string> UserNameProperty = RegisterProperty<string>(c => c.UserName);
        [DisplayName("登录名")]
        [FieldDescription(ColumnName="SUR_USERNAME",FriendlyName="登录名",NeedUpdate=true)]
        public string UserName { get; set; }


        private static readonly PropertyInfo<string> NameProperty = RegisterProperty<string>(c => c.Name);
        [DisplayName("姓名")]
        [FieldDescription(ColumnName="SUR_NAME",FriendlyName="姓名",NeedUpdate=true)]
        public string Name { get; set; }

        private static readonly PropertyInfo<string> PasswordProperty = RegisterProperty<string>(c => c.Password);
        [DisplayName("密码")]
        [FieldDescription(ColumnName="SUR_PASSWORD",FriendlyName="密码",NeedUpdate=true)]
        public string Password { get; set; }

        private static readonly PropertyInfo<string> LoginMacProperty = RegisterProperty<string>(c => c.LoginMac);
        [DisplayName("登录Mac地址")]
        [FieldDescription(ColumnName="SUR_LOGIN_MAC",FriendlyName="登录Mac地址",NeedUpdate=true)]
        public string LoginMac { get; set; }

        private static readonly PropertyInfo<string> LoginIPProperty = RegisterProperty<string>(c => c.LoginIP);
        [DisplayName("登录IP")]
        [FieldDescription(ColumnName="SUR_LOGIN_IP",FriendlyName="登录IP",NeedUpdate=true)]
        public string LoginIP { get; set; }


        private static readonly PropertyInfo<DateTime?> LoginTimeProperty = RegisterProperty<DateTime?>(c => c.LoginTime);
        [DisplayName("登录时间")]
        [FieldDescription(ColumnName="SUR_LOGIN_TIME",FriendlyName="登录时间",NeedUpdate=true)]
        public DateTime? LoginTime { get; set; }

        private static readonly PropertyInfo<DateTime?> LogoutTimeProperty = RegisterProperty<DateTime?>(c => c.LogoutTime);
        [DisplayName("登出时间")]
        [FieldDescription(ColumnName="SUR_LOGOUT_TIME",FriendlyName="登出时间",NeedUpdate=true)]
        public DateTime? LogoutTime { get; set; }

        private static readonly PropertyInfo<DateTime?> LoginFailTimeProperty = RegisterProperty<DateTime?>(c => c.LoginFailTime);
        [DisplayName("登录失败时间")]
        [FieldDescription(ColumnName="SUR_LOGIN_FAIL_TIME",FriendlyName="登录失败时间",NeedUpdate=true)]
        public DateTime? LoginFailTime { get; set; }

        private static readonly PropertyInfo<Int32?> LoginFailCountProperty = RegisterProperty<Int32?>(c => c.LoginFailCount);
        [DisplayName("登录失败次数")]
        [FieldDescription(ColumnName="SUR_LOGIN_FAIL_COUNT",FriendlyName="登录失败次数",NeedUpdate=true)]
        public Int32? LoginFailCount { get; set; }


        private static readonly PropertyInfo<bool?> LockFGProperty = RegisterProperty<bool?>(c => c.LockFG);
        [DisplayName("是否锁定")]
        [FieldDescription(ColumnName="SUR_LOCK_FG",FriendlyName="是否锁定",NeedUpdate=true)]
        public bool? LockFG { get; set; }

        private static readonly PropertyInfo<bool?> DisableFGProperty = RegisterProperty<bool?>(c => c.DisableFG);
        [DisplayName("是否有效")]
        [FieldDescription(ColumnName="SUR_DISABLE_FG",FriendlyName="是否有效",NeedUpdate=true)]
        public bool? DisableFG { get; set; }


        #region 通用字段

        private static readonly PropertyInfo<DateTime?> CreateTimeProperty = RegisterProperty<DateTime?>(c => c.CreateTime);
        [DisplayName("创建时间")]
        [FieldDescription(ColumnName="CreateTime",FriendlyName="创建时间",NeedUpdate=true)]
        public override DateTime? CreateTime { get; set; }

        private static readonly PropertyInfo<DateTime?> LastUpdateTimeProperty = RegisterProperty<DateTime?>(c => c.LastUpdateTime);
        [DisplayName("最后修改时间")]
        [FieldDescription(ColumnName="LastUpdateTime",FriendlyName="最后修改时间",NeedUpdate=true)]
        public override DateTime? LastUpdateTime { get; set; }



        public override void SetPrimaryKey(string key)
        {
            SUR_ID = key;
        }
        #endregion
    }

    [Serializable]
    public class SysUserList : IfBusinessList<SysUserList, SysUser>
    { }
}

现在就可以工作了：
全表检索数据方法：

SysUserList selData = SysUserList.Fetch();

向数据库新增一条数据：

SysUser.Business.SysUser user = new SysUser.Business.SysUser();

user.UserName= "inaction";

user.Name = "流砂";

user.Password= "superman";

selData.Add(user);

selData.Save();

向数据库修改数据：

var user = SysUserList.Fetch(c => c.UserName == "inaction");

user.Password = "123456";

 SysUserList list = new SysUserList { user };
 list.Save();

以上代码就实现了对密码的修改。

特别说明：目前IF 只能通过SysUserList对象的Save方法保存数据。以后会实现通过业务类自身Save方法保存数据。

附：源码下载地址