diff --git a/Src/Asp.NetCore2/SqlSugar/Abstract/ExecuteNavProvider/InsertNavProvider.cs b/Src/Asp.NetCore2/SqlSugar/Abstract/ExecuteNavProvider/InsertNavProvider.cs
index efeb31fb1..838252f32 100644
--- a/Src/Asp.NetCore2/SqlSugar/Abstract/ExecuteNavProvider/InsertNavProvider.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Abstract/ExecuteNavProvider/InsertNavProvider.cs
@@ -11,7 +11,7 @@ namespace SqlSugar
     {
 
         public List<Root> Roots { get;  set; }
-        public object ParentList { get; set; }
+        public List<object> ParentList { get; set; }
         public EntityInfo ParentEntity { get; set; }
         public SqlSugarProvider Context { get;   set; }
 
@@ -19,7 +19,7 @@ namespace SqlSugar
         {
             if (ParentList == null) 
             {
-                ParentList = GetParentList(Roots);
+                ParentList = GetParentList(Roots).Cast<object>().ToList();
             }
             var name=ExpressionTool.GetMemberName(expression);
             var nav = this.ParentEntity.Columns.FirstOrDefault(x => x.PropertyName == name);
@@ -29,7 +29,7 @@ namespace SqlSugar
             }
             if (nav.Navigat.NavigatType == NavigateType.OneToOne || nav.Navigat.NavigatType == NavigateType.ManyToOne)
             {
-                InsertOneToOne();
+                InsertOneToOne<TChild>(ParentList,this.ParentEntity, name,nav);
             }
             else if (nav.Navigat.NavigatType == NavigateType.OneToMany)
             {
@@ -52,9 +52,40 @@ namespace SqlSugar
        
         }
 
-        private void InsertOneToOne()
+        private void InsertOneToOne<TChild>(List<object> parentList, EntityInfo parentEntity, string name, EntityColumnInfo nav)
         {
-            
+            var parentColumn = parentEntity.Columns.FirstOrDefault(it => it.PropertyName==nav.Navigat.Name);
+            this.ParentEntity = this.Context.EntityMaintenance.GetEntityInfo<TChild>();
+            var pkColumn = ParentEntity.Columns.FirstOrDefault(it=>it.IsPrimarykey==true);
+            if (nav.Navigat.Name2.HasValue()) 
+            {
+                pkColumn = ParentEntity.Columns.FirstOrDefault(it => it.PropertyName==nav.Navigat.Name2);
+            }
+            Check.Exception(pkColumn == null, $" Navigate {parentEntity.EntityName} : {name} is error ", $"导航实体 {parentEntity.EntityName} 属性 {name} 配置错误");
+            List<object> childList = new List<object>();
+            foreach (var parent in parentList) 
+            {
+                var childItems=(TChild)nav.PropertyInfo.GetValue(parent);
+                if (childItems != null)
+                {
+                    var pkValue = pkColumn.PropertyInfo.GetValue(childItems);
+                    var pvValue = parentColumn.PropertyInfo.GetValue(parent);
+                    if (IsDefaultValue(pvValue))
+                    {
+                        pvValue = pkValue;
+                    }
+                    if (IsDefaultValue(pvValue))
+                    {
+                        
+                    }
+                }
+            }
+            parentList = childList;
+        }
+
+        private static bool IsDefaultValue(object pvValue)
+        {
+            return pvValue == null || pvValue == UtilMethods.GetDefaultValue(pvValue.GetType());
         }
 
         private List<Type> GetParentList<Type>(List<Type> datas) where Type : class ,new()
diff --git a/Src/Asp.NetCore2/SqlSugar/Abstract/UpdateProvider/UpdateableProvider.cs b/Src/Asp.NetCore2/SqlSugar/Abstract/UpdateProvider/UpdateableProvider.cs
index 7cbd819a4..a1d01657f 100644
--- a/Src/Asp.NetCore2/SqlSugar/Abstract/UpdateProvider/UpdateableProvider.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Abstract/UpdateProvider/UpdateableProvider.cs
@@ -335,6 +335,15 @@ namespace SqlSugar
             UpdateBuilder.Parameters.Add(new SugarParameter(parameterName, fieldValue));
             UpdateBuilder.SetValues.Add(new KeyValuePair<string, string>(SqlBuilder.GetTranslationColumnName(fieldName), $"{SqlBuilder.GetTranslationColumnName(fieldName)}={parameterName}"));
             this.UpdateBuilder.DbColumnInfoList = this.UpdateBuilder.DbColumnInfoList.Where(it => (UpdateParameterIsNull == false && IsPrimaryKey(it)) || UpdateBuilder.SetValues.Any(v => SqlBuilder.GetNoTranslationColumnName(v.Key).Equals(it.DbColumnName, StringComparison.CurrentCultureIgnoreCase) || SqlBuilder.GetNoTranslationColumnName(v.Key).Equals(it.PropertyName, StringComparison.CurrentCultureIgnoreCase)) || it.IsPrimarykey == true).ToList();
+            if (!this.UpdateBuilder.DbColumnInfoList.Any(it => it.DbColumnName.EqualCase(fieldName))) 
+            {
+                this.UpdateBuilder.DbColumnInfoList.Add(new DbColumnInfo()
+                {
+                     DbColumnName=fieldName,
+                      Value=fieldValue,
+                      PropertyName=fieldName
+                });
+            }
             AppendSets();
             return this;
         }
diff --git a/Src/Asp.NetCore2/SqlSugar/Realization/Dm/DmProvider.cs b/Src/Asp.NetCore2/SqlSugar/Realization/Dm/DmProvider.cs
index eb495c950..2bf1446ee 100644
--- a/Src/Asp.NetCore2/SqlSugar/Realization/Dm/DmProvider.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Realization/Dm/DmProvider.cs
@@ -121,7 +121,8 @@ namespace SqlSugar
                 if (sqlParameter.DbType == System.Data.DbType.Guid)
                 {
                     sqlParameter.DbType = System.Data.DbType.String;
-                    sqlParameter.Value = sqlParameter.Value.ToString();
+                    if(sqlParameter.Value != DBNull.Value)
+                       sqlParameter.Value = sqlParameter.Value.ToString();
                 }
                 if (parameter.Direction == 0)
                 {
diff --git a/Src/Asp.NetCore2/SqlSugar/Utilities/UtilMethods.cs b/Src/Asp.NetCore2/SqlSugar/Utilities/UtilMethods.cs
index 3ee26c61e..365f6fc22 100644
--- a/Src/Asp.NetCore2/SqlSugar/Utilities/UtilMethods.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Utilities/UtilMethods.cs
@@ -216,6 +216,10 @@ namespace SqlSugar
             Type type = Nullable.GetUnderlyingType(oldType);
             return type == null ? oldType : type;
         }
+        public static object GetDefaultValue(Type type)
+        {
+            return type.IsValueType ? Activator.CreateInstance(type) : null;
+        }
         public static string ReplaceSqlParameter(string itemSql, SugarParameter itemParameter, string newName)
         {
             itemSql = Regex.Replace(itemSql, string.Format(@"{0} ", "\\" + itemParameter.ParameterName), newName + " ", RegexOptions.IgnoreCase);