我写的程序如下,运行时出现异常,不知什么原因,请高手赐教
procedure TForm1.BtnDeleteClick(Sender: TObject);
var
ln:integer;
begin
listview1.DeleteSelected;
Label8.Caption:=inttostr(ln);
if listview1.Items.Count>=ln then
begin
ListView1.Selected := ListView1.Items.Item[ln];
ListView1.Selected.Selected :=TRUE;
ListView1.Selected.MakeVisible(True);
end;
end;
procedure TForm1.BtnDeleteClick(Sender: TObject);
var
ln:integer;
begin
listview1.DeleteSelected;
Label8.Caption:=inttostr(ln);
if listview1.Items.Count>=ln then
begin
ListView1.Selected := ListView1.Items.Item[ln];
ListView1.Selected.Selected :=TRUE;
ListView1.Selected.MakeVisible(True);
end;
end;
var
ln: Integer;
begin
if not Assigned(listView1.Selected) then Exit;
ln := listView1.Selected.Index;
listView1.DeleteSelected;
if ln >= listView1.Items.Count - 1 then
ln := listView1.Items.Count - 1;
if ln < 0 then Exit;
listView1.Selected := listView1.Items.Item[ln];
listView1.Selected.MakeVisible(True);
end;