学生成绩管理系统/frmStudent/frmStuChange.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 BLL;
using Model;

namespace 学生成绩管理系统.frmStudent
{
    public partial class frmStuChange : Form
    {
        private  Stu stu = new Stu();
        private DataTable dtstudent;
        public frmStuChange()
        {
            InitializeComponent();
        }
        public frmStuChange(Stu stu, DataTable dtstudent)
        {
            this.stu = stu;
            this.dtstudent = dtstudent;
            InitializeComponent();
        }
        private void frmStuChange_Load(object sender, EventArgs e)
        {
          
            //民族
            StuBLL stubll = new StuBLL();
            DataTable dtnation = stubll.GetNation();
            cobNation.DataSource = stubll.GetNation();
            cobNation.DisplayMember = "nationnal";


            //系别
            DeptBLL deptBll = new DeptBLL();
            DataTable dtdept = deptBll.getDept();
            cobDept.DataSource = deptBll.getDept();
            cobDept.DisplayMember = "cdeptname";
            cobDept.ValueMember = "cdeptno";

            //StuBLL stubll = new StuBLL();
            //dtstudent = stubll.GetStu();


            txtNo.Text = stu.SNo;
            txtNo.Enabled = false;
            txtName.Text = stu.SName;
            cobNation.Text = stu.SNation;
            dateTimePicker1.Value = Convert.ToDateTime(stu.Sbirthday.ToString());
            if (stu.SSex.ToString ().Trim () == "男")
            {
                rdoBoy.Checked = true;
            }
            else if (stu.SSex.ToString().Trim() == "女")
            {
                rdoGirl.Checked = true;