PDF.NET框架學習篇之SQL-MAP使用儲存過程

jack_mjl發表於2013-11-24

最近一直在學習“深藍醫生”的PDF.NET框架,對Sql-Map使用儲存過程有了點小小的體會。基礎知識請到http://www.cnblogs.com/bluedoctor/archive/2010/07/03/1769890.html中檢視。

本文通過一個簡單的例子以說明通過Sql-Map使用儲存過程,並返回一個實體類。

功能實現:通過儲存過程驗證登入使用者的合法性。

1.建立資料庫表:

//系統使用者維護表
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:未啟用  1:啟用 [REMARK] [nvarchar](200) NULL )

2.建立使用者驗證儲存過程:

//功能:驗證使用者的合法性。如果驗證通過則返回當前登入使用者的全部資訊
CREATE
PROCEDURE up_user_verify ( @login_name nvarchar(50), @password nvarchar(50), @error nvarchar(500) output  --如果驗證未通過,輸出錯誤提示資訊。 ) AS declare @user_id int, @pwd nvarchar(50), @user_state int   --判斷是否存在使用者,此處對使用者的登入名和登入密碼進行大小寫區分 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)
--登入名驗證 if @user_id is null begin set @error = '使用者登入名:'+@login_name+'不存在' return null end --登入密碼驗證 if cast(@password as varbinary) != cast(@pwd as varbinary) begin set @error = '登入密碼不正確,請重新輸入' return null end --使用者狀態驗證 if @user_state = 0 begin set @error = '使用者:' +@login_name+'未啟用' return null end
  --通過驗證,返回使用者的資訊
select * from t_user where [login_name] = @login_name

3.生成表T_USER對應的實體類:

  [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>
        /// 使用者ID
        /// </summary>
        public System.Int32 USER_ID
        {
            get{return getProperty<System.Int32>("USER_ID");}
            set{setProperty("USER_ID",value );}
        }
        /// <summary>
        /// 登入名稱
        /// </summary>
        public System.String LOGIN_NAME
        {
            get{return getProperty<System.String>("LOGIN_NAME");}
            set{setProperty("LOGIN_NAME",value ,50);}
        }
        /// <summary>
        /// 真實姓名
        /// </summary>
        public System.String REAL_NAME
        {
            get{return getProperty<System.String>("REAL_NAME");}
            set{setProperty("REAL_NAME",value ,50);}
        }
        /// <summary>
        /// 登入密碼
        /// </summary>
        public System.String PASSWORD
        {
            get{return getProperty<System.String>("PASSWORD");}
            set{setProperty("PASSWORD",value ,50);}
        }
        /// <summary>
        /// 使用者狀態
        /// </summary>
        public System.String USER_STATE
        {
            get{return getProperty<System.String>("USER_STATE");}
            set{setProperty("USER_STATE",value ,50);}
        }
        /// <summary>
        /// 備註資訊
        /// </summary>
        public System.String REMARK
        {
            get{return getProperty<System.String>("REMARK");}
            set{setProperty("REMARK",value ,200);}
        }
    }

4.Sql-Map配置指令碼:

<CommandClass Name="UserManage" Class="UserInfoManageDAL" Description="系統使用者資訊維護" Interface="">
   <Select CommandName="VerifyUser" CommandType="StoredProcedure" Method="" Description="驗證使用者的合法性" 
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程式:

public partial class UserInfoManageDAL : DBMapper 
    {
        /// <summary>
        /// 預設建構函式
        /// </summary>
        public UserInfoManageDAL()
        {
            Mapper.CommandClassName = "UserManage";
            Mapper.EmbedAssemblySource = "DAL,DAL.SqlMap.config";
        }/// <summary>
        /// 使用者合法性驗證
        /// </summary>
        /// <param name="loginName">登入名</param>
        /// <param name="password">登入密碼</param>
        /// <param name="error">驗證失敗的錯誤資訊</param>
        /// <returns>驗證通過,返回使用者實體類例項</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>
        /// 獲取全部使用者資訊
        /// </summary>
        /// <returns>使用者實體列表</returns>
        public List<Tb_User> GetAllUser()
        {
            return OQL.From<Tb_User>().Select().END.ToList<Tb_User>();
        }
        /// <summary>
        /// 通過使用者ID獲取使用者資訊
        /// </summary>
        /// <param name="userId">使用者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.測試程式

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); 
}

 

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