PDF.NET框架学习篇之SQL-MAP使用存储过程

最近一直在学习“深蓝医生”的PDF.NET框架，对Sql-Map使用存储过程有了点小小的体会。基础知识请到http://www.cnblogs.com/bluedoctor/archive/2010/07/03/1769890.html中查看。

本文通过一个简单的例子以说明通过Sql-Map使用存储过程，并返回一个实体类。

功能实现：通过存储过程验证登录用户的合法性。

1.创建数据库表：

//系统用户维护表
CREATE TABLE T_USER
(
[USER_ID] [int] PRIMARY KEY,
[LOGIN_NAME] [nvarchar](50) NULL,
[REAL_NAME] [nvarchar](50) NULL,
[PASSWORD] [nvarchar](50) NULL,
[USER_STATE] [int] NULL,　　--0：未激活　　1：激活
[REMARK] [nvarchar](200) NULL
)

2.创建用户验证存储过程：

//功能：验证用户的合法性。如果验证通过则返回当前登录用户的全部信息
CREATE PROCEDURE up_user_verify
(
@login_name nvarchar(50),
@password nvarchar(50),
@error nvarchar(500) output　　--如果验证未通过，输出错误提示信息。
)
AS
declare @user_id int,
@pwd nvarchar(50),
@user_state int
　　--判断是否存在用户，此处对用户的登录名和登录密码进行大小写区分
select @user_id = [user_id], @pwd = [password], @user_state = [user_state]
　　from t_user
　　where cast([login_name] as varbinary) = cast(@login_name as varbinary)
--登录名验证
if @user_id is null
begin
set @error = '用户登录名：'+@login_name+'不存在'
return null
end
--登录密码验证
if cast(@password as varbinary) != cast(@pwd as varbinary)
begin
set @error = '登录密码不正确，请重新输入'
return null
end
--用户状态验证
if @user_state = 0
begin
set @error = '用户：' +@login_name+'未激活'
return null
end
　　--通过验证，返回用户的信息
select * from t_user where [login_name] = @login_name

3.生成表T_USER对应的实体类：

　　[Serializable()]
public partial class Tb_User : EntityBase
{
public Tb_User()
{
TableName = "T_USER";
EntityMap=EntityMapType.Table;
PrimaryKeys.Add("USER_ID");
}
protected override void SetFieldNames()
{
PropertyNames = new string[] { "USER_ID","LOGIN_NAME","REAL_NAME","PASSWORD","USER_STATE","REMARK" };
}
/// <summary>
/// 用户ID
/// </summary>
public System.Int32 USER_ID
{
get{return getProperty<System.Int32>("USER_ID");}
set{setProperty("USER_ID",value );}
}
/// <summary>
/// 登录名称
/// </summary>
public System.String LOGIN_NAME
{
get{return getProperty<System.String>("LOGIN_NAME");}
set{setProperty("LOGIN_NAME",value ,50);}
}
/// <summary>
/// 真实姓名
/// </summary>
public System.String REAL_NAME
{
get{return getProperty<System.String>("REAL_NAME");}
set{setProperty("REAL_NAME",value ,50);}
}
/// <summary>
/// 登录密码
/// </summary>
public System.String PASSWORD
{
get{return getProperty<System.String>("PASSWORD");}
set{setProperty("PASSWORD",value ,50);}
}
/// <summary>
/// 用户状态
/// </summary>
public System.String USER_STATE
{
get{return getProperty<System.String>("USER_STATE");}
set{setProperty("USER_STATE",value ,50);}
}
/// <summary>
/// 备注信息
/// </summary>
public System.String REMARK
{
get{return getProperty<System.String>("REMARK");}
set{setProperty("REMARK",value ,200);}
}
}

4.Sql-Map配置脚本：

<CommandClass Name="UserManage" Class="UserInfoManageDAL" Description="系统用户信息维护" Interface="">
<Select CommandName="VerifyUser" CommandType="StoredProcedure" Method="" Description="验证用户的合法性"
ResultClass="EntityObject" ResultMap="DAL.Entitys.Tb_User">
<![CDATA[[up_user_verify] #login_name:String,String,50,Input# #password:String,String,50,Input# #error:String,String,500,Output#]]>
</Select>
</CommandClass>

5.SQL-MAP的DAL程序：

public partial class UserInfoManageDAL : DBMapper
{
/// <summary>
/// 默认构造函数
/// </summary>
public UserInfoManageDAL()
{
Mapper.CommandClassName = "UserManage";
Mapper.EmbedAssemblySource = "DAL,DAL.SqlMap.config";
}/// <summary>
/// 用户合法性验证
/// </summary>
/// <param name="loginName">登录名</param>
/// <param name="password">登录密码</param>
/// <param name="error">验证失败的错误信息</param>
/// <returns>验证通过，返回用户实体类实例</returns>
public Tb_User VerifyUser(string loginName, string password, ref string error)
{
CommandInfo cmdInfo = Mapper.GetCommandInfo("VerifyUser");
cmdInfo.DataParameters[0].Value = loginName;
cmdInfo.DataParameters[1].Value = password;
cmdInfo.DataParameters[2].Value = error;
Tb_User user = EntityQuery<Tb_User>.QueryObject(CurrentDataBase.ExecuteDataReader(cmdInfo.CommandText, cmdInfo.CommandType, cmdInfo.DataParameters));　　　　　　　　
error = user == null ? cmdInfo.DataParameters[2].Value.ToString() : string.Empty;
return user;
}
/// <summary>
/// 获取全部用户信息
/// </summary>
/// <returns>用户实体列表</returns>
public List<Tb_User> GetAllUser()
{
return OQL.From<Tb_User>().Select().END.ToList<Tb_User>();
}
/// <summary>
/// 通过用户ID获取用户信息
/// </summary>
/// <param name="userId">用户ID</param>
/// <returns></returns>
public Tb_User GetUserById(int userId)
{
Tb_User user = new Tb_User();
user.USER_ID = userId;
OQL q = OQL.From(user).Select().Where(user.USER_ID).END;
return EntityQuery<Tb_User>.QueryObject(q);
}
}

6.测试程序

private void button1_Click(object sender, EventArgs e)
{
　　UserInfoManageDAL dal = new UserInfoManageDAL();
　　string name = "admin";
　　string pwd = "abc";
　　string error = string.Empty;
　　Tb_User user = dal.VerifyUser(name, pwd, ref error);
　　if (user == null)
　　　　MessageBox.Show(error);
　　else
　　　　MessageBox.Show(user.USER_ID.ToString() + ":" user.LOGIN_NAME + ":" + user.REAL_NAME);
}