NPOI读取excel文件

获取excel里面的数据 放进datatable

if (this.fuUpload.HasFile)
{

   //根据路径通过已存在的excel来创建HSSFWorkbook，即整个excel文档
    HSSFWorkbook workbook = new HSSFWorkbook(this.fuUpload.FileContent);

   //获取excel的第一个sheet
    HSSFSheet sheet = workbook.GetSheetAt(0);
 
    DataTable table = new DataTable();
   //获取sheet的首行
    HSSFRow headerRow = sheet.GetRow(0);

   //一行最后一个方格的编号 即总的列数
    int cellCount = headerRow.LastCellNum;
 
    for (int i = headerRow.FirstCellNum; i < cellCount; i++)
    {
        DataColumn column = new DataColumn(headerRow.GetCell(i).StringCellValue);
        table.Columns.Add(column);
    }
   //最后一列的标号  即总的行数
    int rowCount = sheet.LastRowNum;
 
    for (int i = (sheet.FirstRowNum + 1); i < sheet.LastRowNum; i++)
    {
        HSSFRow row = sheet.GetRow(i);
        DataRow dataRow = table.NewRow();
 
        for (int j = row.FirstCellNum; j < cellCount; j++)
        {
            if (row.GetCell(j) != null)
                dataRow[j] = row.GetCell(j).ToString();
        }
 
        table.Rows.Add(dataRow);
    }
 
    workbook = null;
    sheet = null;
 
    this.gvExcel.DataSource = table;
    this.gvExcel.DataBind();
}