为什么table1.recNO总是显示“－1”？？？？急！！！ (50分)

G

gaobingxuan

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• 2002-12-17

• #1

用ADO连接就可以正确显示当前记录，用TABLE连接，总是显示当前记录是“－1”
不知道为什么啊！！！！！！！！
求求大哥大姐了，快一点告诉我吧。。。。。。。。。。。。。。
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J

jinmen

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• 2002-12-17

• #2

MatchQuery.SQL.Clear;
MatchQuery.SQL.Add('select *');
MatchQuery.SQL.Add('from tablename');
MatchQuery.Prepare;
MatchQuery.Open;
RecNum:=MatchQuery.Fields[0].AsInteger;
MatchQuery.Close;
没有问题，table应该也是一样。如果table没有和DB连接，默认值是-1。

 

K

kkyy

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• 2002-12-17

• #3

TTABLE的本地数据库的RECNO才可以用关系型的不能用RECNO

 

W

www

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• 2002-12-17

• #4

要先
table.last
然后再取recNo才会正确

 

N

naughtboy

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• 2002-12-17

• #5

As implemented in TDataSet, the value of RecNo is always -1.
Ordinarily an application does not access RecNo at the TDataSet
level. Instead a re-implemented RecNo property in a descendant class
such as TClientDataSet is accessed. RecNo provides a fallback
property for derived datasets that do not support record numbers.

 

H

hansheng

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• 2002-12-17

• #6

同意kkyy的意见

 

G

gaobingxuan

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• 2002-12-18

• #7

多人接受答案了。