C#-WinForm班级下拉框数据绑定

前台展示

后台方法

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Data.SqlClient;
using Models;
namespace DAL
{
    public class StudentClassService
    {
        /// 

        /// 获取学员班级方法
        /// 
        /// 
        public List GetAllClass()
        {
            string sql = "Select ClassName,ClassId from StudentClass";
            SqlDataReader objReader = SQLHelper.GetReader(sql);
            List list = new List();
            while (objReader.Read())
            {
                list.Add(new StudentClass()
                {
                    ClassId = Convert.ToInt32(objReader["ClassId"]),
                    ClassName = objReader["ClassName"].ToString()
                });
            }
            objReader.Close();
            return list;
        }  
    }
}

窗体初始化