添加项目文件。

WaterCloud.Code/Web/TreeQuery.cs

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+/*******************************************************************************
+ * Copyright © 2016 WaterCloud.Framework 版权所有
+ * Author: WaterCloud
+ * Description: WaterCloud快速开发平台
+ * Website：
+*********************************************************************************/
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Linq.Expressions;
+
+namespace WaterCloud.Code
+{
+	public static class TreeQuery
+	{
+		public static List<T> TreeWhere<T>(this List<T> entityList, Predicate<T> condition, string keyValue = "F_Id", string parentId = "F_ParentId") where T : class
+		{
+			List<T> locateList = entityList.FindAll(condition);
+			var parameter = Expression.Parameter(typeof(T), "t");
+			List<T> treeList = new List<T>();
+			foreach (T entity in locateList)
+			{
+				treeList.Add(entity);
+				string pId = entity.GetType().GetProperty(parentId).GetValue(entity, null).ToString();
+				while (true)
+				{
+					if (string.IsNullOrEmpty(pId) && pId == "0")
+					{
+						break;
+					}
+					Predicate<T> upLambda = (Expression.Equal(parameter.Property(keyValue), Expression.Constant(pId))).ToLambda<Predicate<T>>(parameter).Compile();
+					T upRecord = entityList.Find(upLambda);
+					if (upRecord != null)
+					{
+						treeList.Add(upRecord);
+						pId = upRecord.GetType().GetProperty(parentId).GetValue(upRecord, null).ToString();
+					}
+					else
+					{
+						break;
+					}
+				}
+			}
+			return treeList.Distinct().ToList();
+		}
+	}
+}