学生成绩管理系统/frmClass/frmAddClass.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 Model;
using BLL;

namespace 学生成绩管理系统.frmClass
{
    public partial class frmAddClass : Form
    {
        private string dept;
        public frmAddClass()
        {
            InitializeComponent();
        }
        public frmAddClass(string depart)
        {
            InitializeComponent();
            this.dept = depart;
        }

        private void frmAddClass_Load(object sender, EventArgs e)
        {
            lblDeptName.Text = dept;
            SqlConnection conn = new SqlConnection();
            conn.ConnectionString = System.Configuration.ConfigurationManager.ConnectionStrings["connstr"].ConnectionString;
            SqlCommand cmd = new SqlCommand();
            cmd.Connection = conn;
            cmd.CommandText = "select cdeptNo,cdeptName from dbo.Department where(cdeptName='" + lblDeptName.Text + "')";
            conn.Open();
            SqlDataReader dr = cmd.ExecuteReader();
            if (dr.Read())
            {
                lblDeptNo.Text = dr[0].ToString();
            }
        }

        private void btnOk_Click(object sender, EventArgs e)
        {
            Class cla = new Class ();
            cla.CName = txtClassName.Text;
            cla.CNo = txtClassNo.Text;
            cla.CdeptNo = lblDeptNo.Text;
           ClassBLL  classBll = new ClassBLL ();
            try
            {
                if (classBll.ClassADD(cla))
                {
                    MessageBox.Show("班级信息已经添加");
                    this.Close(); 
                }

            }
            catch (Exception ex)