各位老师:
    请问为什么做了索引的字段在进行查询时系统会提示"找不到变量**"
    下面是我查询按钮中的一段代码,其中编号是表JSDJ中作为索引的字段,当我进行查询时,用"名称"进行查询一切正常,但是用"编号"查询时系统会提示"找不到变量BH".      
      do case
 case 名称"
  lx=Alltrim(thisform.text1.value)
  select * from jsdj where  jsdj.名称=lx into cursor lsb
  thisform.grid1.recordsource="lsb"
 case 编号"
  bh=Alltrim(thisform.text1.value)
  select * from jsdj where  jsdj.编号=bh into cursor lsb
  thisform.grid1.recordsource="lsb"

case 编号"
  bh=Alltrim(thisform.text1.value)
  select * from jsdj where  jsdj.编号=bh into cursor lsb
  thisform.grid1.recordsource="lsb"
至少这段程序是没有问题的.

do case
case alltrim()="名称"
  lx=Alltrim(thisform.text1.value)
  select * from jsdj where  jsdj.名称=lx into cursor lsb
  thisform.grid1.recordsource="lsb"
case alltrim()="编号"
  bh=Alltrim(thisform.text1.value)
  select * from jsdj where  jsdj.编号=bh into cursor lsb
  thisform.grid1.recordsource="lsb"