diff --git a/Src/Asp.NetCore2/SqlSugar/Abstract/EntityMaintenance/EntityMaintenance.cs b/Src/Asp.NetCore2/SqlSugar/Abstract/EntityMaintenance/EntityMaintenance.cs
index fa18a615a..313179e7c 100644
--- a/Src/Asp.NetCore2/SqlSugar/Abstract/EntityMaintenance/EntityMaintenance.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Abstract/EntityMaintenance/EntityMaintenance.cs
@@ -308,6 +308,8 @@ namespace SqlSugar
                         column.IsIgnore = true;
                         column.NoSerialize = sugarColumn.NoSerialize;
                         column.ColumnDescription = sugarColumn.ColumnDescription;
+                        column.IsJson = sugarColumn.IsJson;
+                        column.IsArray = sugarColumn.IsArray;
                     }
                 }
                 if (column.ColumnDescription.IsNullOrEmpty()) column.ColumnDescription = GetPropertyAnnotation(result.Type, column.PropertyName);
diff --git a/Src/Asp.NetCore2/SqlSugar/Abstract/QueryableProvider/QueryableProvider.cs b/Src/Asp.NetCore2/SqlSugar/Abstract/QueryableProvider/QueryableProvider.cs
index 444c30a19..4da31981e 100644
--- a/Src/Asp.NetCore2/SqlSugar/Abstract/QueryableProvider/QueryableProvider.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Abstract/QueryableProvider/QueryableProvider.cs
@@ -1358,19 +1358,45 @@ namespace SqlSugar
             var list= this.ToPivotList(columnSelector, rowSelector, dataSelector);
             return this.Context.Utilities.SerializeObject(list);
         }
-        public List<T> ToChildList(Expression<Func<T, object>> parentIdExpression, object primaryKeyValue) 
+        public List<T> ToChildList(Expression<Func<T, object>> parentIdExpression, object primaryKeyValue,bool isContainOneself = true) 
         {
             var entity = this.Context.EntityMaintenance.GetEntityInfo<T>();
             var pk = GetTreeKey(entity);
             var list = this.ToList();
-            return GetChildList(parentIdExpression, pk, list, primaryKeyValue);
+            if (isContainOneself)
+            {
+                var result= GetChildList(parentIdExpression, pk, list, primaryKeyValue);
+                var addItem = this.Context.Queryable<T>().In(pk, primaryKeyValue).First();
+                if (addItem != null)
+                {
+                    result.Add(addItem);
+                }
+                return result;
+            }
+            else
+            {
+                return GetChildList(parentIdExpression, pk, list, primaryKeyValue);
+            }
         }
-        public async Task<List<T>> ToChildListAsync(Expression<Func<T, object>> parentIdExpression, object primaryKeyValue) 
+        public async Task<List<T>> ToChildListAsync(Expression<Func<T, object>> parentIdExpression, object primaryKeyValue,bool isContainOneself=true) 
         {
             var entity = this.Context.EntityMaintenance.GetEntityInfo<T>();
             var pk = GetTreeKey(entity);
             var list = await this.ToListAsync();
-            return GetChildList(parentIdExpression,pk,list, primaryKeyValue);
+            if (isContainOneself)
+            {
+                var result = GetChildList(parentIdExpression, pk, list, primaryKeyValue);
+                var addItem = this.Context.Queryable<T>().In(pk, primaryKeyValue).First();
+                if (addItem != null)
+                {
+                    result.Add(addItem);
+                }
+                return result;
+            }
+            else
+            {
+                return GetChildList(parentIdExpression, pk, list, primaryKeyValue);
+            }
         }
         public List<T> ToParentList(Expression<Func<T, object>> parentIdExpression, object primaryKeyValue)
         {
diff --git a/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/Subquery/Items/SubDistinctCount.cs b/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/Subquery/Items/SubDistinctCount.cs
new file mode 100644
index 000000000..959cd89e9
--- /dev/null
+++ b/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/Subquery/Items/SubDistinctCount.cs
@@ -0,0 +1,67 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Linq.Expressions;
+using System.Text;
+
+namespace SqlSugar
+{
+    public class SubDistinctCount : ISubOperation
+    {
+        public bool HasWhere
+        {
+            get; set;
+        }
+
+        public string Name
+        {
+            get
+            {
+                return "DistinctCount";
+            }
+        }
+
+        public Expression Expression
+        {
+            get; set;
+        }
+
+
+        public int Sort
+        {
+            get
+            {
+                return 200;
+            }
+        }
+
+        public ExpressionContext Context
+        {
+            get; set;
+        }
+
+        public string GetValue(Expression expression = null)
+        {
+            var exp = expression as MethodCallExpression;
+            var argExp = exp.Arguments[0];
+            var parametres = (argExp as LambdaExpression).Parameters;
+            if ((argExp as LambdaExpression).Body is UnaryExpression)
+            {
+                argExp = ((argExp as LambdaExpression).Body as UnaryExpression).Operand;
+            }
+            var argLambda = argExp as LambdaExpression;
+            if (this.Context.InitMappingInfo != null && argLambda != null && argLambda.Parameters.Count > 0)
+            {
+                foreach (var item in argLambda.Parameters)
+                {
+                    this.Context.InitMappingInfo(item.Type);
+                }
+                this.Context.RefreshMapping();
+            }
+            var result = "COUNT(DISTINCT " + SubTools.GetMethodValue(Context, argExp, ResolveExpressType.WhereMultiple) + ")";
+            var selfParameterName = Context.GetTranslationColumnName(parametres.First().Name) + UtilConstants.Dot;
+            result = result.Replace(selfParameterName, SubTools.GetSubReplace(this.Context));
+            return result;
+        }
+    }
+}
diff --git a/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/Subquery/SubTools.cs b/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/Subquery/SubTools.cs
index c3f28d26f..bd001e618 100644
--- a/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/Subquery/SubTools.cs
+++ b/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/Subquery/SubTools.cs
@@ -36,7 +36,8 @@ namespace SqlSugar
                                                     new SubHaving(){  Context=Context},
                                                     new SubWithNolock(){ Context=Context },
                                                     new SubEnableTableFilter(){ Context=Context },
-                                                    new SubSelectStringJoin{ Context=Context }
+                                                    new SubSelectStringJoin{ Context=Context },
+                                                    new SubDistinctCount{ Context=Context }
                                                 };
         }
 
diff --git a/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/Subquery/Subquerable.cs b/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/Subquery/Subquerable.cs
index e47326180..ae4555b9b 100644
--- a/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/Subquery/Subquerable.cs
+++ b/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/Subquery/Subquerable.cs
@@ -120,6 +120,11 @@ namespace SqlSugar
         {
             return default(string);
         }
+
+        public int DistinctCount(Func<T, object> expression) 
+        {
+            return default(int);
+        }
         public TResult Sum<TResult>(Func<T, TResult> expression) where TResult : struct
         {
             return default(TResult);
diff --git a/Src/Asp.NetCore2/SqlSugar/Interface/IQueryable.cs b/Src/Asp.NetCore2/SqlSugar/Interface/IQueryable.cs
index 4a40f11b0..6a951d035 100644
--- a/Src/Asp.NetCore2/SqlSugar/Interface/IQueryable.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Interface/IQueryable.cs
@@ -172,8 +172,8 @@ namespace SqlSugar
         Task<string> ToJsonPageAsync(int pageIndex, int pageSize, RefAsync<int> totalNumber);
         KeyValuePair<string, List<SugarParameter>> ToSql();
         string ToSqlString();
-        List<T> ToChildList(Expression<Func<T, object>> parentIdExpression, object primaryKeyValue);
-        Task<List<T>> ToChildListAsync(Expression<Func<T, object>> parentIdExpression, object primaryKeyValue);
+        List<T> ToChildList(Expression<Func<T, object>> parentIdExpression, object primaryKeyValue, bool isContainOneself = true);
+        Task<List<T>> ToChildListAsync(Expression<Func<T, object>> parentIdExpression, object primaryKeyValue, bool isContainOneself = true);
         List<T> ToParentList(Expression<Func<T, object>> parentIdExpression, object primaryKeyValue);
         Task<List<T>> ToParentListAsync(Expression<Func<T, object>> parentIdExpression, object primaryKeyValue);
         List<T> ToTree(Expression<Func<T,IEnumerable<object>>> childListExpression, Expression<Func<T,object>> parentIdExpression,object rootValue);