NPOI读取Excel

项目环境：Webform framework4.0

dll版本：NPOI2.0  dotnet2.0版本

这两天要做个excel导入的功能，想到以前用过NPOI，感觉很给力，今天写了个DEMO，写的时候还算顺利，毕竟以前用过，还是想记录下来，留着以后直接复制

把excel数据读取并拼接到DataTable中，为了使用SqlBulkCopy一次性拷贝到数据库中

             IWorkbook workbook = null;
             string fileExt = Path.GetExtension(path);
             try
             {
                 using (var file = new FileStream(path, FileMode.Open, FileAccess.Read))
                 {
                     if (fileExt == ".xls")
                         workbook = new HSSFWorkbook(file);
                     else if (fileExt == ".xlsx")
                         workbook = new XSSFWorkbook(file);
                     else
                     {

                     }
                 }
             }
             catch (Exception ex)
             { }

 //获取sheet页
             var sheet = workbook.GetSheetAt();
             //获取总条数
             int RowCount = sheet.LastRowNum;
             //获取sheet页的第一条数据
             IRow firstRow = sheet.GetRow();
             //获取总列数
             int CellCount = firstRow.LastCellNum;

             DataTable dt = new DataTable();
             for (int j = ; j < CellCount; j++)
             {
                 string value = firstRow.GetCell(j).StringCellValue;
                 DataColumn dc = new DataColumn(value, typeof(String));
                 dt.Columns.Add(dc);
             }

             for (int i = ; i <= RowCount; i++)
             {
                 IRow row = sheet.GetRow(i);
                 DataRow dr = dt.NewRow();
                 for (int j = ; j < CellCount; j++)
                 {
                     object obj = row.GetCell(j);
                     if (obj != null)
                         dr[j] = obj.ToString();
                     else
                         dr[j] = "";
                 }
                 dt.Rows.Add(dr);
             }

最后使用SqlBulkCopy

SqlBulkCopy sqlbulkcopy = new SqlBulkCopy(connectionString, SqlBulkCopyOptions.UseInternalTransaction);
sqlbulkcopy.DestinationTableName = "Table_1";//数据库中的表名
sqlbulkcopy.WriteToServer(dataset.Tables[]);