近得一段代码
procedure TForm1.BitBtn1Click(Sender: TObject);
var
i:integer;
booklist:tbooklist;
book:tbookstr;begin
book:=table1.Book;
try
listbox1.Clear;
booklist:=dbgrid1.SelectedRows;
for i:=0 to booklist.Count-1 do
begin
table1.Book:=booklist[i];
listbox1.Items.Add(table1.fieldbyname('name').AsString);//has probelm??
end;
finally
table1.Book:=book;
end;
bitbtn2.Enabled:=true;
end;
是用于DBGird显示数据库,listbox显示DBGird中被选中的数据库的表,运行后无错,但listbox却无法显示,特请教各大虾,帮忙!!!最好指出错误,并给出正确代码,先谢了………
procedure TForm1.BitBtn1Click(Sender: TObject);
var
i:integer;
booklist:tbooklist;
book:tbookstr;begin
book:=table1.Book;
try
listbox1.Clear;
booklist:=dbgrid1.SelectedRows;
for i:=0 to booklist.Count-1 do
begin
table1.Book:=booklist[i];
listbox1.Items.Add(table1.fieldbyname('name').AsString);//has probelm??
end;
finally
table1.Book:=book;
end;
bitbtn2.Enabled:=true;
end;
是用于DBGird显示数据库,listbox显示DBGird中被选中的数据库的表,运行后无错,但listbox却无法显示,特请教各大虾,帮忙!!!最好指出错误,并给出正确代码,先谢了………
//--- 跟踪一下看看table1.fieldbyname('name').AsString的值,可能问题出现在这
booklist.Count
的值,是否小于1
或者
begin
book:=table1.Book;
try
listbox1.Clear;
booklist:=dbgrid1.SelectedRows;
showmessage(intostr(booklist.count));//显示有几条纪录showmessage(table1.fieldbyname('name').AsString)//看看是不是空字符串
listbox1.Items.Add(table1.fieldbyname('name').AsString) for i:=0 to booklist.Count-1 do