将Excel导入到数据中

常用的方式的有两种:

1. 通过 Microsoft.Jet.OLEDB.4.0 或  Microsoft.ACE.OLEDB.12.0

Microsoft.ACE.OLEDB.12.0 需要安装 AccessDatatbaseEngine

http://download.microsoft.com/download/7/0/3/703ffbcb-dc0c-4e19-b0da-1463960fdcdb/AccessDatabaseEngine.exe

 

public DataTable ExcelToDataTable(string strExcelFileName, string strSheetName)

{

    string path = Server.MapPath(".")+"\\Common\\"+strExcelFileName;

    string conn1 = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + path + 

                    ";Extended Properties=Excel 8.0;";

    string conn2 = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + path + 

                   ";Extended Properties='Excel 12.0;HDR=Yes;IMEX=1'";

    string strExcel = string.Format("select * from [{0}$]", strSheetName);

    DataSet ds = new DataSet();

    using (OleDbConnection conn = new OleDbConnection(conn2))

    {

        conn.Open();

        OleDbDataAdapter adapter = new OleDbDataAdapter(strExcel, conn);

        adapter.Fill(ds, strSheetName);

        conn.Close();

        return ds.Tables[strSheetName];

    }

}

//调用方式: DataTable dt =   ExcelToDataTable("Report.xls","list");

 

 

2.通过  NPOI 2.1.1

public DataTable ExcelToDataTable(string strFileName, int sheetIndex = 0)

{

    string path = Server.MapPath(".") + "\\Common\\" + strFileName;

    DataTable dt = new DataTable();

    HSSFWorkbook hssfworkbook = null;

    XSSFWorkbook xssfworkbook = null;

    string fileExt = Path.GetExtension(path);

    using (FileStream file = new FileStream(path, FileMode.Open, FileAccess.Read))

    {

        if (fileExt == ".xls")

            hssfworkbook = new HSSFWorkbook(file);

        else if (fileExt == ".xlsx")

            xssfworkbook = new XSSFWorkbook(file);

    }

    if (hssfworkbook != null)

    {

        HSSFSheet sheet = (HSSFSheet)hssfworkbook.GetSheetAt(sheetIndex);

        if (sheet != null)

        {

            System.Collections.IEnumerator rows = sheet.GetRowEnumerator();

            HSSFRow headerRow = (HSSFRow)sheet.GetRow(0);

            int cellCount = headerRow.LastCellNum;

            for (int j = 0; j < cellCount; j++)

            {

                HSSFCell cell = (HSSFCell)headerRow.GetCell(j);

                dt.Columns.Add(cell.ToString());

            }

            for (int i = (sheet.FirstRowNum + 1); i <= sheet.LastRowNum; i++)

            {

                HSSFRow row = (HSSFRow)sheet.GetRow(i);

                DataRow dataRow = dt.NewRow();

                for (int j = row.FirstCellNum; j < cellCount; j++)

                {

                    if (row.GetCell(j) != null)

                        dataRow[j] = row.GetCell(j).ToString();

                }

                dt.Rows.Add(dataRow);

            }

        }

    }

    else if (xssfworkbook != null)

    {

        XSSFSheet xSheet = (XSSFSheet)xssfworkbook.GetSheetAt(sheetIndex);

        if (xSheet != null)

        {

            System.Collections.IEnumerator rows = xSheet.GetRowEnumerator();

            XSSFRow headerRow = (XSSFRow)xSheet.GetRow(0);

            int cellCount = headerRow.LastCellNum;

            for (int j = 0; j < cellCount; j++)

            {

                XSSFCell cell = (XSSFCell)headerRow.GetCell(j);

                dt.Columns.Add(cell.ToString());

            }

            for (int i = (xSheet.FirstRowNum + 1); i <= xSheet.LastRowNum; i++)

            {

                XSSFRow row = (XSSFRow)xSheet.GetRow(i);

                DataRow dataRow = dt.NewRow();

                for (int j = row.FirstCellNum; j < cellCount; j++)

                {

                    if (row.GetCell(j) != null)

                        dataRow[j] = row.GetCell(j).ToString();

                }

                dt.Rows.Add(dataRow);

            }

        }

    }

    return dt;

}



//调用方式: DataTable dt = ExcelToDataTable("Report.xls");