/// <summary>

       /// 全选树

       /// </summary>

       /// <param name="tree">树控件</param>

       /// <param name="nodes">节点集合</param>

      public virtual void SelectTreeListAll(DevExpress.XtraTreeList.TreeList tree,TreeListNodes nodes=null)

       {

           nodes = nodes ?? tree.Nodes;

           foreach(TreeListNode item in nodes)

           {

               tree.Selection.Add(item);

               if (tree.HasChildren)

               {

                   SelectTreeListAll(tree, item.Nodes);

               }

           }        }