理想做法是如果有孩子index为0,如果有孩子并且展开的index为2,如果没有孩子就为1 procedure Tbmbm.TreeView1GetSelectedIndex(Sender: TObject;
Node: TTreeNode);
begin
with Node do
if HasChildren then
if Expanded then
ImageIndex:=2
else
ImageIndex:=0
else
ImageIndex:=1; end;用了这段代码发现也不对,是不是应该在动态创建的时候创建呀
var
Node1:TTreeNode;
s:PString;
i:integer;
begin
Node1:=TreeView.Items.AddChild(Node,ADOQ.FieldByName('bz').Text);
New(s);
s^:=ADOQ.FieldByName('id').Text;
Node1.Data:=s;
Result:=Node1;
end;Function Tbmbm.SearchNode(TreeView:TTreeView;Txts:String):TTreeNode;
var
i:integer;
s:PString;
Node1:TTreeNode;
begin
Result:=nil;
For i:=0 To TreeView.Items.Count-1 Do
begin
s:=TreeView.Items[i].Data;
If s^=Txts Then
begin
Result:=TreeView.Items[i];
Exit;
end;
end;
end;procedure Tbmbm.Button1Click(Sender: TObject);
var
i,Rec_Num:integer;
Node1,Node2:TTreeNode;
begin
TreeView1.Items.Clear;
TreeView1.Items.BeginUpdate;
Node1:=TreeView1.Items.GetFirstNode;
with adoquery1 do
begin
close;
sql.Clear;
sql.Add('select * from bmbm order by id');
open;
end;
If ADOquery1.RecordCount>0 Then
Begin
Rec_Num:= ADOQuery1.RecordCount;
For i:=0 To Rec_Num-1 Do
begin
If ADOQuery1.FieldByName('parent').Text='0' Then
Node2:=AddNode(TreeView1,Node1,ADOQuery1)
Else
begin
Node2:=SearchNode(TreeView1,ADOQuery1.FieldByName('parent').Text);
If Node2<>nil Then
AddNode(TreeView1,Node2,ADOQuery1);
end;
ADOQuery1.Next;
end;
End;这是创建的代码,有谁会改吗