方法没有重载添加三个参数

Question

public class Class1
{
    public Class1(int id , string name , string cast)
    {

        this.id = id;
        this.name = name;
        this.cast = cast;

    }
    public int id { get; set; }
    public string name { get; set; }
    public string cast { get; set; }

}


 public List<Class1> getall() {

        List<Class1> list = new List<Class1>();
        using  (SqlConnection con = Main.Maindata2()){
            SqlCommand cmd
                 = new SqlCommand("SELECT  * FROM  List", con);

            con.Open();
            SqlDataReader reaader = cmd.ExecuteReader();

            while (reaader.Read()) { 
           // list.Add((int)reaader["Id"],(string)reaader["name"],(string)reaader["cast"]);

//list.CLAS
            list.Add((int)reaader["Id"],  (string)reaader["name"], (string)reaader["cast"]);


            }
            return list;
        }

    }
    }

Answer 1

你需要在while循环中执行此操作

var obj = new Class1((int)reaader["Id"].ToString(), reaader["name"].ToString(), reaader["cast"].ToString());
list.Add(obj);