.net excel利用NPOI导入oracle

1.链接数据库

  引用System.Data.OracleClient；

  //数据库链接字符串   Data Source如：192.168.5.153:1521/orcl

  string linkStr = "User ID=" + name + "; Password=" + password + "; Data Source=" + oraLink;

  OracleConnection oraCon = new OracleConnection(linkStr);

  oraCon.Open();

2.利用NPOI读取excel数据  

public class ExcelHelper:IDisposable
    {
        private string fileName = null; //文件名
        private IWorkbook workbook = null;
        private FileStream fs = null;
        private bool disposed;

        public ExcelHelper(string fileName)
        {
            this.fileName = fileName;
            disposed = false;
        }
        /// <summary>
        /// 将Excel导入数据库
        /// </summary>
        /// <param name="sheetName"></param>
        /// <param name="isFirstRowColumn"></param>
        /// <returns></returns>
        public DataTable ExcelToDataTable(string sheetName, bool isFirstRowColumn)
        {
            ISheet sheet = null;
            DataTable data = new DataTable();
            int startRow = 0;
            try
            {
                fs = new FileStream(fileName, FileMode.Open, FileAccess.Read);
                if (fileName.IndexOf(".xlsx") > 0) // 2007版本
                    workbook = new HSSFWorkbook(fs);
                else if (fileName.IndexOf(".xls") > 0) // 2003版本
                    workbook = new HSSFWorkbook(fs);

                if (sheetName != null)
                {
                    sheet = workbook.GetSheet(sheetName);
                    if (sheet == null) //如果没有找到指定的sheetName对应的sheet，则尝试获取第一个sheet
                    {
                        sheet = workbook.GetSheetAt(0);
                    }
                }
                else
                {
                    sheet = workbook.GetSheetAt(0);
                }
                if (sheet != null)
                {
                    IRow firstRow = sheet.GetRow(0);
                    int cellCount = firstRow.LastCellNum; //一行最后一个cell的编号 即总的列数

                    if (isFirstRowColumn)
                    {
                        for (int i = firstRow.FirstCellNum; i < cellCount; ++i)
                        {
                            ICell cell = firstRow.GetCell(i);
                            if (cell != null)
                            {
                                string cellValue = cell.StringCellValue;
                                if (cellValue != null)
                                {
                                    DataColumn column = new DataColumn(cellValue);
                                    data.Columns.Add(column);
                                }
                            }
                        }
                        startRow = sheet.FirstRowNum + 1;
                    }
                    else
                    {
                        startRow = sheet.FirstRowNum;
                    }

                    //最后一列的标号
                    int rowCount = sheet.LastRowNum;
                    for (int i = startRow; i <= rowCount; ++i)
                    {
                        IRow row = sheet.GetRow(i);
                        if (row == null) continue; //没有数据的行默认是null　　　　　　　

                        DataRow dataRow = data.NewRow();
                        for (int j = row.FirstCellNum; j < cellCount; ++j)
                        {
                            if (row.GetCell(j) != null) //同理，没有数据的单元格都默认是null
                                dataRow[j] = row.GetCell(j).ToString();
                        }
                        data.Rows.Add(dataRow);
                    }
                }

                return data;
            }
            catch (Exception ex)
            {
                Console.WriteLine("Exception: " + ex.Message);
                return null;
            }
        }

        public void Dispose()
        {
            Dispose(true);
            GC.SuppressFinalize(this);
        }

        protected virtual void Dispose(bool disposing)
        {
            if (!this.disposed)
            {
                if (disposing)
                {
                    if (fs != null)
                        fs.Close();
                }

                fs = null;
                disposed = true;
            }
        }

3.插入数据库

 --利用openFileDialog读取文件名

 --代码如下：

  openFileDialog1.Filter = "(*.xls)|*.xls";
  openFileDialog1.ShowDialog();
  this.textBox1.Text = openFileDialog1.FileName;

 --将数据插入oracle数据库

  using(ExcelHelper excel = new ExcelHelper(this.textBox1.Text))

 {

      DataTable dbdata = excel.ExcelToDataTable(null, true); //调用excelHelper中的函数

      for (int i = 0; i < dbdata.Rows.Count; i++)  //解析数据   

     {

         string XMMC = dbdata.Rows[i][0].ToString();

         string sql ="insert into XXX(xmmc) values ('"+XMMC +"')";       

         OracleCommand cmd = new OracleCommand(sql, oraCon);
         OracleDataReader reader = cmd.ExecuteNonQuery();//增删改

         /*  判断数据是否存在

         OracleCommand cmd = new OracleCommand(sql1, oraCon);
         OracleDataReader reader = cmd.ExecuteReader();

         if(reader.Read()){}

       */

     }

 }