三层常用就是UI,DAL,MODEL 还有其他的比如接口 模式等 这里以普通三层为例 实现插入数据的功能 。
先定义model实体类
View Code private int uid;
private string uname;
private string upass;
public int UserId
{
get { return uid; }
set { uid &＃61; value; }
}
public string UserName
{
get { return uname; }
set { uname &＃61; value; }
}
public string UserPass
{
get { return upass; }
set { upass &＃61; value; }
}
DAL数据访问层&＃xff1b;
public UserService(){}private string db &＃61; System.Configuration.ConfigurationSettings.AppSettings["ConstrSQL"].ToString();//数据库连接字符串///
BLL层我的理解就是UI与DAL之间的桥梁 &＃xff0c;主要是一调用的函数&＃xff08;方法&＃xff09;
View Code public bool BLL_Insert(Model.UserInfo mu)
{
DAL.UserService du &＃61; new DAL.UserService();
return du.Insert(mu);
}
UI层调用BLL
View Code 1 Model.UserInfo mu &＃61; new Model.UserInfo();
2 mu.UserName &＃61; TextBox1.Text;
3 mu.UserPass &＃61; TextBox2.Text;
4 DAL.UserService du &＃61; new DAL.UserService();
5 du.Insert(mu);
6 Response.Write("提交成功&＃xff01;");
7 TextBox2.Text &＃61; "";
三层顺序model -dal-bll&＃xff0c;BLL引用DAL&＃xff0c;DAL引用MODEL
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