CourseUI/ClassForm.cs

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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using Course.BLL;
using Course.Models;

namespace Course.UI
{
    public partial class ClassForm : Form
    {
        public ClassForm()
        {
            InitializeComponent();
        }

        ClassInfo classInfo = null;
        public ClassForm(ClassInfo objclass)
        {
            classInfo = objclass;
            InitializeComponent();
        }

        public static bool state = true;


        public string objClassRoomName = string.Empty;
        public string objMachineRoomName = string.Empty;
        public string objClassTime = string.Empty;
        public string objCoursePlace = string.Empty;

        bool objCon = false;
        public static int objType = 0;
        int classId = 0;
        GradeManager gradeManager = new GradeManager();
        TeacherManager teacherManager = new TeacherManager();
        BookManager bookManager = new BookManager();
        ChapterManager chapterManager = new ChapterManager();
        SourceManager sourceManager = new SourceManager();
        ClassManager classManager = new ClassManager();


        private void ClassForm_Load(object sender, EventArgs e)
        {

            this.cboGradeName.DataSource = gradeManager.GetAllGrade();
            this.cboGradeName.DisplayMember = "GradeName";
            this.cboGradeName.ValueMember = "GradeId";

            this.cboTeacherName.DataSource = teacherManager.GetAllTeacher();
            this.cboTeacherName.DisplayMember = "TeacherName";
            this.cboTeacherName.ValueMember = "TeacherId";

            this.cboBookName.DataSource = bookManager.GetAllBooks(Convert.ToInt32(this.cboGradeName.SelectedValue));
            this.cboBookName.DisplayMember = "BookName";
            this.cboBookName.ValueMember = "BookId";