使用n-tire asp.net获取和检索数据

使用n-tire asp.net获取和检索数据

大家好，我已经制作了n个轮胎来插入、更新、选择和删除

插入和删除工作正常，但我有问题，使选择所有数据，以便进行更新

这是db.class中可以执行连接的方法

 public void ConnectDB(CommandType CT,string ProNameSQl)
    {
        cn = new SqlConnection("Data Source=.;Initial Catalog=Conversation;Integrated Security=True");
        cmd = new SqlCommand();
        cmd.Connection = cn;
        cmd.CommandType = CT;
        cmd.CommandText = ProNameSQl;
        cn.Open();
    }
    public int RunProcedure(string ProcedureName, SortedList Paraval)
    {
        ConnectDB(CommandType.StoredProcedure, ProcedureName);
        for (int x = 0; x < Paraval.Count; x++)
        {
            try
            {
                cmd.Parameters.AddWithValue(Paraval.GetKey(x).ToString(), Paraval.GetByIndex(x));
            }
            catch
            {
                ;
            }
        }
        return ExceNoneQuery();
    }
 public DataTable RunSQl(string Select)
    {
        ConnectDB(CommandType.Text, Select);
        dt=new DataTable();
        dt.Load(cmd.ExecuteReader());
        cn.Close();
        return dt;
    }

然后在检查后，我制作另一个类来传递操作类型"i"指的是sql中的过程名称

 public bool Add()
     {
         return LoadProperties2List("i");
     }

如果一切正常，它会运行到最后一个轮胎，在那里代码可以像插入一样执行

public class UsersInfo :MainTable
{
    #region Feild
    private string _id;
    private string _username;
    private string _SecondarySchool;
    private string _University;
    #endregion
    #region Properties
    public string id
    {
        get
        {
            return _id;
        }
        set
        {
            _id = value;
        }
    }
    public string UserName
    {
        get
        {
            return _username;
        }
        set
        {
            _username = value;
        }
    }
    public string SecondarySchool
    {
        get
        {
            return _SecondarySchool;
        }
        set
        {
            _SecondarySchool = value;
        }
    }
    public string University
    {
        get
        {
            return _University;
        }
        set
        {
            _University = value;
        }
    }


    #endregion
    public override bool LoadProperties2List(string TypeOfOperation)
    {
        SortedList Sl = new SortedList();
        Sl.Add("@CommandType", TypeOfOperation);
        Sl.Add("@UserName",UserName);
        Sl.Add("@SecondarySchool",SecondarySchool);
        Sl.Add("@University",University);

        ProcedureName = "MangeUserInfo";
        if (db.RunProcedure(ProcedureName, Sl) == 1)
            return true;
        else
            return false;
    }
    public bool Register(string User, string SecondaryS, string Unvi)
    {
        this.UserName = User;
        this.SecondarySchool = SecondaryS;
        this.University = Unvi;

        if (Add())
            return true;
        else
            return false;
    }

这段代码运行良好。如何使用这些层来检测和检索数据库，并在文本框中显示它们？？？使用相同的层

 public bool find(string usernameid)
  {
      string query = String.Format("SELECT id FROM Users WHERE UserName='{0}'", usernameid);
      DataTable tbl = SeectData(query);
      if (tbl.Rows.Count == 0)
          return false;
      else
      {
          this.id = tbl.Rows[0][0].ToString();
          return true;
      }
  }

if (SelD.find(username))
                {
                    UserNid = SelD.id;
                }