update:treenode remove empty children

Api/Ewide.Core/Util/TreeBuildUtil.cs

@@ -27,6 +27,10 @@ namespace Ewide.Core
         /// <param name="children"></param>
         void SetChildren(IList children);
     }
+    public class TreeBuildSetting
+    {
+        public bool AddEmptyChildren { get; set; } = true;
+    }
 
     /// <summary>
     /// 递归工具类，用于遍历有父子关系的节点，例如菜单树，字典树等等
@@ -34,10 +38,15 @@ namespace Ewide.Core
     /// <typeparam name="T"></typeparam>
     public class TreeBuildUtil<T> where T : ITreeNode
     {
+        TreeBuildSetting _setting;
+        public TreeBuildUtil(TreeBuildSetting setting = null)
+        {
+            _setting = setting ?? new TreeBuildSetting();
+        }
         /// <summary>
         /// 顶级节点的父节点Id(默认0)
         /// </summary>
-        private readonly List<string> _rootParentIds = new List<string> {string.Empty,Guid.Empty.ToString() };
+        private readonly List<string> _rootParentIds = new List<string> { string.Empty, Guid.Empty.ToString() };
 
         /// <summary>
         /// 构造树节点
@@ -59,7 +68,8 @@ namespace Ewide.Core
             if (results.Count < 1)
             {
                 var ids = new List<string>();
-                nodes.ForEach(u => {
+                nodes.ForEach(u =>
+                {
                     ids.Add(u.GetId());
                 });
 
@@ -89,7 +99,10 @@ namespace Ewide.Core
             });
             nodeSubLists.ForEach(u => BuildChildNodes(totalNodes, u, new List<T>()));
             childNodeLists.AddRange(nodeSubLists);
-            node.SetChildren(childNodeLists);
+            if (childNodeLists.Count > 0 || _setting.AddEmptyChildren)
+            {
+                node.SetChildren(childNodeLists);
+            }
         }
     }
 }