怎么判断DBGrid中是否有数据？

Question

怎么判断DBGrid中是否有数据？

Answer 1

if DBGrid.DataSource.DataSet.RecordCount>0 then
  showmessage('DBGrid中有数据')
else
  showmessage('DBGrid中没有数据')

Answer 2

DBgrid1.DataSource<>nil and DBgrid1.DataSource.DataSet.RecordCount>0

Answer 3

d6
if DBgrid1.column[0].asstring=null
d5
if DBgrid1.column[0].asstring=''

Answer 4

if DBGrid.DataSource.DataSet.RecordCount>0 then
  showmessage('DBGrid中有数据')
else
  showmessage('DBGrid中没有数据')

Answer 5

DBgrid1.DataSource<>nil and DBgrid1.DataSource.DataSet.RecordCount>0
//连接数据库                        表中有数据