c#.net Excel中的数据导入到SQL数据库中

   /// <summary>
        /// 从Excel 导入学生
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnInport_Click(object sender, EventArgs e)
        {
            try
            {
                //取得用户选择的Excel文件的方法
                string strFileName = GetUserSelectFile();//获得excel路径
                //string strFileName = @"E:\学士后\录像\二单元\2开发分层架构\Excel报表下载资料\授课源代码\授课源代码\PB_StudentInport\学生基本信息.xls";//获得excel路径
               //如果文件不为空
                if (strFileName.Equals(string.Empty))
                {
                    return;
                }
                else
                {
                    //从Excel中导入学生信息
                    ExcelHandle excelHandle = new ExcelHandle();
                    //GetStudentsFromExcel用这个方法把数据导入到 List<Student>集合中，两个参数一个是的到文件名，二个工作表的名字Sheet1，这个方法返回 List集合对象且保存数据到这个集合中
                    List<Student> students = excelHandle.GetStudentsFromExcel(strFileName, "Sheet1");
                    //判断如果这个集合有数据
                    if (students.Count > 0)
                    {
                        //导入学生信息
                        string messages = "";
                        //AddStudent添加的方法
                        int count = new StudentManager().AddStudent(students, ref messages);
                        if (count == students.Count)//全部导入成功
                        {
                            MessageBox.Show(INPORTSUCCESS, OPERATIONWARN, MessageBoxButtons.OK, MessageBoxIcon.Warning);
                        }
                        else
                        {
                            MessageBox.Show(messages, OPERATIOFAILED, MessageBoxButtons.OK, MessageBoxIcon.Warning);
                        }
                        //如果导入数据大于1条，重新绑定列表
                        if (count > 0)
                        {
                            this.BindStudents();
                        }

                    }
                    else
                    {
                        MessageBox.Show(EMPTYDATA, OPERATIOFAILED, MessageBoxButtons.OK, MessageBoxIcon.Warning);
                    }
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, OPERATIOFAILED, MessageBoxButtons.OK, MessageBoxIcon.Error);
                return;
            }
        }

  /// <summary>
        /// 取得用户选择的Excel文件
        /// </summary>
        /// <returns>用户选择的文件名</returns>
        public string GetUserSelectFile()
        {

            //实例化 OpenFileDialog对象，用于打开文件对话框
            OpenFileDialog fileDialog = new OpenFileDialog();

            fileDialog.InitialDirectory = "c:\\";
            fileDialog.Filter = "Microsoft Excel files (*.xls)|*.xls";

            if (fileDialog.ShowDialog() == DialogResult.OK)
            {
                if ((fileDialog.OpenFile()) != null)
                {
                    return fileDialog.FileName;
                }
            }
            return string.Empty;
        }

 /// <summary>
        /// 从Excel 获取学生数据
        /// </summary>
        /// <param name="filePath">带完整路径的Excel文件名</param>
        /// <param name="sheetName">工作表名字</param>
        /// <returns>学生实体集合</returns>
        public List<Student> GetStudentsFromExcel(string filePath, string sheetName)
        {

            List<Student> students = new List<Student>();
            Microsoft.Office.Interop.Excel.Application excel =
                new Microsoft.Office.Interop.Excel.Application();
            Worksheet sheet = null;
            Range rNo = null;
            try
            {
                excel.Workbooks.Open(filePath);//打开Excel 文件

            
                foreach (Worksheet wsheet in excel.ActiveWorkbook.Sheets)
                {
                    if (wsheet.Name == sheetName)
                    {
                        sheet = wsheet;
                        break;
                    }
                }
                //读取单元格数据
                if (sheet != null)
                {
                    int row = 2;//当前行号
                    while (true)
                    {
                        //如果碰到学号为空的行，则停止读取数据
                         rNo = sheet.Cells[row, 1] as Range;
                        if (rNo.Text.ToString().Trim().Length == 0)
                        {
                            break;
                        }

                        Student stu = new Student();
                        //学号
                        Range rContent = sheet.Cells[row, 1] as Range;
                        stu.StudentNo = Convert.ToInt32(rContent.Text.ToString().Trim());
                        //密码
                        rContent = sheet.Cells[row, 2] as Range;
                        stu.LoginPwd = rContent.Text.ToString().Trim();
                        //姓名
                        rContent = sheet.Cells[row, 3] as Range;
                        stu.StudentName = rContent.Text.ToString().Trim();
                        //性别
                        rContent = sheet.Cells[row, 4] as Range;
                        stu.Gender = rContent.Text.ToString().Trim() == "男" ? true : false;
                        //年级
                        rContent = sheet.Cells[row, 5] as Range;
                        stu.GradeId = new GradeManager().GetGradeId(rContent.Text.ToString().Trim());
                        //电话
                        rContent = sheet.Cells[row, 6] as Range;
                        stu.Phone = rContent.Text.ToString().Trim();
                        //地址
                        rContent = sheet.Cells[row, 7] as Range;
                        stu.Address = rContent.Text.ToString().Trim();
                        //出生年月日
                        rContent = sheet.Cells[row, 8] as Range;
                        stu.BornDate = Convert.ToDateTime(rContent.Text.ToString().Trim());
                        //邮箱
                        rContent = sheet.Cells[row, 9] as Range;
                        stu.Email = rContent.Text.ToString().Trim();
                        //身份证号
                        rContent = sheet.Cells[row, 10] as Range;
                        stu.IdentityCard = rContent.Text.ToString().Trim();

                        students.Add(stu);
                        row += 1;
                    }
                }
                excel.Visible = true;
                //关闭WorkBook
                excel.ActiveWorkbook.Close();
                //关闭Excel
                excel.Quit();
            }
            finally
            {
                //主动释放COM对象
                Marshal.ReleaseComObject(sheet);
                Marshal.ReleaseComObject(excel);
                Marshal.ReleaseComObject(rNo);
                //对象引用设置null
                 sheet = null;
                 excel = null;
                 rNo = null;
                //通过垃圾收集器回收对象
                 GC.Collect();
            }
            return students;
        }

        /// <summary>
        /// 导入学生信息
        /// </summary>
        /// <param name="students">学生实体集合</param>
        /// <param name="messages">消息字符串，必须为空字符串</param>
        /// <returns></returns>
        public int AddStudent(List<Student> students, ref string messages)
        {
            int i = 0;
            foreach (Student stu in students)
            {
                string mess = "";
                if (this.AddStudent(stu, ref mess) == false)
                {
                    messages += string.Format("学号为{0}的数据错误，{1}；", stu.StudentNo, mess);
                }
                else//添加数据成功
                {
                    i++;
                }
            }
            return i;
        }

/*************************************
 * 类名：Student
 * 功能描述：提供学生实体类
 * ************************************/
namespace MySchool.Models
{
    [Serializable]
    public class Student
    {
        public int StudentNo{set;get;}
        public string LoginPwd{set;get;}
        public string StudentName{set;get;}
        public bool Gender { set; get; }
        public int GradeId { set; get; }
        public string Phone { set; get; }
        public string Address { set; get; }
        public DateTime BornDate { set; get; }
        public string Email { set; get; }
        public string IdentityCard { set; get; }

    }
}