1、type
noderec=record
parentid;integer;
groupid:integer;
groupname:string;
end;
2、
The following code defines a record type of TMyRec and a record pointer type of PMyRec.
type
PMyRec = ^TMyRec;
TMyRec = record
FName: string;
LName: string;
end;
Assuming these types are used, the following code adds a node to TreeView1 as the last sibling of a specified node. A TMyRec record is associated with the added item. The FName and LName fields are obtained from edit boxes Edit1 and Edit2. The Index parameter is obtained from edit box Edit3. The item is added only if the Index is a valid value.
procedure TForm1.Button1Click(Sender: TObject);
var
MyRecPtr: PMyRec;
TreeViewIndex: LongInt;
begin
New(MyRecPtr);
MyRecPtr^.FName := Edit1.Text;
MyRecPtr^.LName := Edit2.Text;
TreeViewIndex := StrToInt(Edit3.Text);
with TreeView1 do
begin
if Items.Count = 0 then
Items.AddObject(nil, 'Item' + IntToStr(TreeViewIndex), MyRecPtr)
else
if (TreeViewIndex < Items.Count) and (TreeViewIndex >= 0) then
Items.AddObject(Items[TreeViewIndex], 'Item' + IntToStr(TreeViewIndex), MyRecPtr);
end;
end;
After an item containing a TMyRec record has been added, the following code retrieves the FName and LName values associated with the item and displays the values in a label.
procedure TForm1.Button2Click(Sender: TObject);
begin
Label1.Caption := PMyRec(TreeView1.Selected.Data)^.FName + ' ' +
PMyRec(TreeView1.Selected.Data)^.LName;
end;
