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ÎÒÓÐÒ»¸öedit£¬Ò»¸öbutton£¬½«editÊäÈëµÄÄÚÈÝÔÚsqlÖнøÐвéÕÒ£¬button°´ÏºóÔÚºóÃæÏÔʾ³öÀ´£¬µ«ÊÇÎÒÓÐÒ»¸öÎÊÌ⣬Èç¹ûÔÚsql²éѯ²»µ½¾ÍºÜÂé·³£¬Ïñ±¨´íÒ»ÑùµÄÌøÒ»¸ö¶Ô»°¿ò³öÀ´£¬ÎÒÏëÈç¹ûûÓÐËÑË÷µ½£¬ÄÇÌøÒ»¸ö¶Ô»°¿ò³öÀ´ÌáʾûÓкÏÊʵIJéѯ£¬ÇëÎÊÔõôŪ£¿ÊÇ×Ô¼ºÌí¼ÓÒ»¸öform»¹ÊÇÓÃshowmessage£¿
¶¼ÐУ¬showmessage¿ÉÄÜ×öÆðÀ´¸ü¿ì
ÌáʾÓÃshowmessage×îºÃ.Äã¿ÉÒ԰Ѳéѯ·Åµ½TRYÖÐ
if Qry.RecordCount = 0 then
ShowMessage('ûÓÐÕÒµ½¼Ç¼');
Èç¹ûÒªËü²»±¨´í£º
ÓÃ
try
...
except
...
finally
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try
if qy.IsEmpty then showmessage('ûÓÐÕÒµ½¼Ç¼£¡')£»
except
on E:Exception do
ShowMessage(E.Message);
end;
showMessageºÜ·½±ãµÄ
begin
if cus_name.Text=''
then showmessage('ÇëÊäÈëÒª²éѯµÄ¿Í»§ÐÕÃû')
else
with adoquery1 do
begin
close;
sql.Clear;
sql.Add('select * from Ô¤¶©¿Í»§²éѯ±í where ¿Í»§ÐÕÃû=:name');
Parameters.ParamByName('name').Value:= Trim(cus_name.text);
open;
try
if adoquery1.RecordCount = 0 then
ShowMessage('ûÓÐÕÒµ½¼Ç¼');
except
while not eof do
begin
cus_time.Text:=adoquery1.Fieldbyname('Èëסʱ¼ä').AsString;
cus_rnum.Text:=adoquery1.Fieldbyname('·¿¼äºÅ').AsString;
Next;
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Option Explicit
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