net读取excel中数据并显示到gridview中

protected void Button1_Click(object sender, EventArgs e)
     {
        string filepath=FileUpload1.PostedFile.FileName;
        ReadExcel(filepath, gdBom);
    }
    public void ReadExcel(string sExcelFile,GridView dgBom)
     {
        DataTable ExcelTable;
        DataSet ds = new DataSet();
        //Excel的连接
        OleDbConnection objConn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + sExcelFile + ";" + "Extended Properties=Excel 8.0;");
        objConn.Open();
        DataTable schemaTable = objConn.GetOleDbSchemaTable(System.Data.OleDb.OleDbSchemaGuid.Tables, null);
        string tableName = schemaTable.Rows[0][2].ToString().Trim();//获取 Excel 的表名，默认值是sheet1
        string strSql = "select * from [" + tableName + "]";
        OleDbCommand objCmd = new OleDbCommand(strSql, objConn);
        OleDbDataAdapter myData = new OleDbDataAdapter(strSql, objConn);
        myData.Fill(ds, tableName);//填充数据

        dgBom.DataSource =ds;
        dgBom.DataBind();
        objConn.Close();
      
        ExcelTable = ds.Tables[tableName];
        int iColums = ExcelTable.Columns.Count;//列数
        int iRows = ExcelTable.Rows.Count;//行数

        //定义二维数组存储 Excel 表中读取的数据
        string[,] storedata = new string[iRows, iColums];
    
        for(int i=0;i<ExcelTable.Rows.Count;i++)
            for (int j = 0; j < ExcelTable.Columns.Count; j++)
             {
                //将Excel表中的数据存储到数组
                storedata[i, j] = ExcelTable.Rows[i][j].ToString();

            }
        int excelBom = 0;//记录表中有用信息的行数，有用信息是指除去表的标题和表的栏目，本例中表的用用信息是从第三行开始
        //确定有用的行数
        for (int k = 2; k < ExcelTable.Rows.Count; k++)
            if (storedata[k, 1] != "")
                excelBom++;
        if (excelBom == 0)
         {
            Response.Write("<script language=javascript>alert('您导入的表格不合格式！')</script>");
        }
        else
         {
            //LoadDataToDataBase(storedata，excelBom)//该函数主要负责将 storedata 中有用的数据写入到数据库中，在此不是问题的关键省略
        }
    }