cxDBTreeList：最简单的节点图标添加方法

先在窗体上放ImageList关联到cxDBTreeList，在cxDBTreeList的GetNodeImageIndex事件中写如下：
procedure cxDBTreeList1GetNodeImageIndex(Sender:
TcxCustomTreeList; ANode: TcxTreeListNode; AIndexType:
TcxTreeListImageIndexType; var AIndex: TImageIndex);

var
i :Integer;
begin
//给树结点加上图标
for i := 0 to ANode.ValueCount do
begin
if ANode.Level = 0 then
begin
ANode.ImageIndex := 0;
end
else
if ANode.Level = 1 then
begin
ANode.ImageIndex := 2;
end
else
if ANode.Level = 2 then
begin
ANode.ImageIndex := 1;
end;
end;
end;
////=====================
 cxDBTreeList1.fullexpand;  //cxdbtreelist1自动展开节点。
 cxdbtreelist1自动折叠 :    cxDBTreeList1.FullCollapse;

//=====================
procedure Tfrmjiankongxinxi.cxDBTreeList1DblClick(Sender: TObject);
var i,sn:Integer;
begin
for i:=0 to cxDBTreeList1.SelectionCount-1 do
    begin
          //ShowMessage(cxDBTreeList1.Selections[i].Values[i]);

          if cxDBTreeList1.FocusedNode.Level=1 then   //判断是不是子节点，1是子节点，0是父节点
           ShowMessage(cxDBTreeList1.Selections[i].Values[i])  //取节点名
          else
          end;

end;