学生成绩管理系统/frmClass/frmDeptClassInfo.cs

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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;
using 学生成绩管理系统.frmClass;
using Model;
using BLL;


namespace 学生成绩管理系统.frmClass
{
    public partial class frmDeptClassInfo : Form
    {
        public frmDeptClassInfo()
        {
            InitializeComponent();
        }

        private void frmDeptClassInfo_Load(object sender, EventArgs e)
        {
            //获取系别
            DeptBLL deptBll = new DeptBLL();
            DataTable dtdept = deptBll.getDept();
            cobDept.DataSource = deptBll.getDept();
            cobDept.DisplayMember = "cdeptname";
            cobDept.ValueMember = "cdeptno";

            
        }

        private void cobDept_SelectedIndexChanged(object sender, EventArgs e)
        {
            //获取系别下的班级
            ClassBLL classBll = new ClassBLL();
            string cdeptno = cobDept.SelectedValue.ToString();
            DataTable dtclass = classBll.GetClass(cdeptno);
            lstClass.DataSource = classBll.GetClass(cdeptno);
            lstClass.DisplayMember = "cname";
            lstClass.ValueMember = "cno";

           
        }

        private void btnAddDept_Click(object sender, EventArgs e)
        {
            frmAddDept fADpt = new frmAddDept();
            if (fADpt.ShowDialog() == DialogResult.OK)
            {
                frmDeptClassInfo_Load(sender, e);
            }
        }

        private void btnAddClass_Click(object sender, EventArgs e)
        {
            frmAddClass fACls = new frmAddClass(this.cobDept.Text );