动态创建DAL层类的实例

 1 namespace DALFactory
 2 {
 3     public  class DALHelper
 4     {
 5         public static IStuDAL AddStu()
 6         {
 7             //IStuDAL stu = new StudentDAL();
 8             //return stu;
 9 
10 
11             //这里应该动态创建类的实例
12             string path = ConfigurationManager.AppSettings["IStuDAL"];   //得到StuDAL.StudentDAL
13             string type = path.Split(‘.‘)[0];    //得到StuDAL
14             Assembly ab = Assembly.Load(type);
15             return  (IStuDAL)ab.CreateInstance(path);
16         }
17 
18         public static IStuDAL GetAllStudent()
19         {
20            string path=ConfigurationManager.AppSettings["IStuDAL"];
21 
22            string type = path.Split(‘.‘)[0];
23            Assembly ab = Assembly.Load(type);
24            return (IStuDAL)ab.CreateInstance(path);
25         }
26     }
27 }