procedure TfrmMG_Edit.DBComboBox4Click(Sender: TObject);
var
sqlStr:string;
begin //列出所有客户
if dbcombobox4.ItemIndex>=0 then
begin
sqlStr:='select * from SubBase where TP='+stringlist1.strings[DBcombobox4.itemindex];
adoquery1.SQL.Clear;
adoquery1.SQL.Text:=sqlStr;
adoquery1.Open;
stringlist2.Clear;
DBcombobox3.Clear;
while not adoquery1.Eof do
begin
DBcombobox3.Items.Append(trim(adoquery1.fieldbyname('Title').AsString));
stringlist2.add(adoquery1.fieldbyname('ID').asstring);
adoquery1.Next;
end;
if trim(kf.Caption)<>'' then
dbcombobox3.ItemIndex:=dbcombobox3.Items.IndexOf(trim(kf.Caption)); end;为什么这段我在Winxp 里面没问题，在98里却提示非法操作，关闭程序？
var
sqlStr:string;
begin //列出所有客户
if dbcombobox4.ItemIndex>=0 then
begin
sqlStr:='select * from SubBase where TP='+stringlist1.strings[DBcombobox4.itemindex];
adoquery1.SQL.Clear;
adoquery1.SQL.Text:=sqlStr;
adoquery1.Open;
stringlist2.Clear;
DBcombobox3.Clear;
while not adoquery1.Eof do
begin
DBcombobox3.Items.Append(trim(adoquery1.fieldbyname('Title').AsString));
stringlist2.add(adoquery1.fieldbyname('ID').asstring);
adoquery1.Next;
end;
if trim(kf.Caption)<>'' then
dbcombobox3.ItemIndex:=dbcombobox3.Items.IndexOf(trim(kf.Caption)); end;为什么这段我在Winxp 里面没问题，在98里却提示非法操作，关闭程序？
by Petr Vones Email: AnonymousThe patch fixes bug in TCustomComboBoxStrings.Get method causing an Access Violation for empty string item in Delphi 7.
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For Delphi, Version 7.0 to 7.0 2225 downloads
Copyright: No significant restrictions
Updated on Sun, 26 Oct 2003 10:37:03 GMT
Originally uploaded on Tue, 24 Sep 2002 13:33:31 GMT
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File Name Date/Time Size
PatchDemo.res 10/26/2003 7:26:00 PM 876 bytes
PatchDemo.dpr 9/24/2002 10:14:16 PM 279 bytes
D7ComboBoxStringsGetPatch.pas 10/26/2003 7:26:36 PM 2.8K
PatchDemoMain.pas 9/24/2002 10:24:42 PM 383 bytes
PatchDemoMain.dfm 10/26/2003 7:35:40 PM 1.6K
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Description
Problem: Selecting an empty string in TComboBox component will cause Access Violation on some systems. See details in Quality Central report #2246.Description: On some systems (Windows 2000 SP3) it will cause Access Violation in ntdll.dll for an empty string item.The patch fixes it for both standalone executables or applications compiled with runtime packages. To use it just add D7ComboBoxStringsGetPatch.pas unit to the project.Updated for using with Debug DCUs. Thanks to Pavel Rogulin.
以上是我在网上http://cc.codegear.com/Item.aspx?id=18872找的资料
说是要加入一个.pas文件就可以
是怎么加入呢？文件我已经有了。