c# - 如何将一个类传递给另一个类以进行代码隐藏？

Question

如何将一个类传递给另一个类以进行代码隐藏？

当我调试并检查 Default.aspx 页面中的 myCategoryObj 时，我可以看到对象在调试中。我究竟做错了什么？

我知道我可以在 Default.aspx 中创建对象，但我不应该这样做我应该能够调用业务逻辑层并请求返回一个对象，然后填充该对象并将其传递回业务逻辑要保存的图层(插入或更新)。

我希望这是有道理的。

Default.aspx

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using SC1.Models.OBJ;
using SC1.Models.BLL;
using SC1.Models.DAL;

namespace SC1
{
  public partial class Default : System.Web.UI.Page
  {
    protected void Page_Load(Object sender, EventArgs e)
    {
      // I know I could do this but I don't want to unless I have too.
      //Category categoryObj = new Category();

      CategoryBLL myCategoryBLL = new CategoryBLL();

      Object myCategoryObj = myCategoryBLL.CategoryNew();

      // How do I make the code below work or what am I doing wrong.  
      myCategoryObj.Name = "test";

      string test = "";

    }
  }
}

CategoryBLL.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
using SC1.Models.DAL;
using SC1.Models.OBJ;

namespace SC1.Models.BLL
{
  public class CategoryBLL
  {
    // Create a page object
    Category myCategoryObject = new Category();

    // Create a Data Acces Layer Object
    CategoryDAL myCategoryDAL = new CategoryDAL();


    public CategoryBLL()
    {
    }

    public DataSet Select()
    {
      return (myCategoryDAL.Select());
    }

    public Object CategoryNew()
    {
      return myCategoryObject;
    }



  }
}

CategoryDAL.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;

namespace SC1.Models.DAL
{
  public class CategoryDAL
  {
    public CategoryDAL()
    {
    }
    string connStr = ConfigurationManager.ConnectionStrings["staceys_cakesConnectionString"].ConnectionString;

    // select all
    public DataSet Select()
    {
      SqlConnection sqlConnection1 = new SqlConnection();
      string SqlString = "select * from Categories";
      SqlDataAdapter da = new SqlDataAdapter(SqlString, connStr);
      DataSet ds = new DataSet();
      da.Fill(ds, "Categories");
      return (ds);
    }
    // save
    // insert
    // update
    // delete

  }
}

Category.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace SC1.Models.OBJ
{
  public class Category
  {
    public int CategoryID { get; set; }
    public int ParentID { get; set; }
    public string Name { get; set; }
    public int DisplayOrder { get; set; }
    public bool Active { get; set; }

    public Category(){
    }

  }
}

Answer 1

改变

Object myCategoryObj = myCategoryBLL.CategoryNew()

到

Category myCategoryObj = myCategoryBLL.CategoryNew()

还有

公共(public)对象类别新建(){ 返回我的类别对象；

到

公共(public)类别 CategoryNew(){ 返回我的类别对象；