OleDbConnection select 字段 from tb 查询
excel Extended Properties='Excel 8.0;HDR=YES;IMEX=1';";//HDR为yes 则第一数据行为列名,为no 则自动为列加列名F1 F2 F3
范围 OleDbCommand com = new OleDbCommand("SELECT * FROM [sheet1$A0:A5]", conn);
OleDbDataAdapter da = new OleDbDataAdapter(com);