对excel操作后的关闭

gjay1688

Set conn = CreateObject("ADODB.Connection")
Set rst = CreateObject("ADODB.RecordSet")

完成对其的操作后，对他们进行关闭的话，应该怎么写？
1.rst.Close Set rst = Nothing
2.rst.Close Set rst = Nothing
  conn.Close Set conn = Nothing
3.rst.Close Set conn = Nothing

huyongdidai

Set xlApp = CreateObject ("Excel.Application")
Set xlFile = xlApp.Workbooks.Open (“ c:\qtp_file\data.xls")
Set xlSheet = xlFile.Sheets("Sheet1")

Set xlSheet = Nothing
Set xlFile = Nothing
Set xlApp = Nothing

dreamever

应该在set xlSheeet = nothing之前再写上一句xlFile.close() ，释放占用的IO资源