diff --git a/Src/Asp.Net/SqlSugar/Abstract/ExecuteNavProvider/UpdateNavTask.cs b/Src/Asp.Net/SqlSugar/Abstract/ExecuteNavProvider/UpdateNavTask.cs
index 2b381c8f5..4a11d8e7a 100644
--- a/Src/Asp.Net/SqlSugar/Abstract/ExecuteNavProvider/UpdateNavTask.cs
+++ b/Src/Asp.Net/SqlSugar/Abstract/ExecuteNavProvider/UpdateNavTask.cs
@@ -65,6 +65,7 @@ namespace SqlSugar
             {
                 ignoreColumns = new string[] { };
             }
+            this.Context = UpdateNavProvider._Context;
             var navColumns = this.Context.EntityMaintenance.GetEntityInfo<Root>().Columns.Where(it=> !ignoreColumns.Contains(it.PropertyName) || !ignoreColumns.Any(z=>z.EqualCase(it.DbColumnName))).Where(it => it.Navigat != null).ToList();
             var updateNavs = this;
             UpdateNavMethodInfo methodInfo = updateNavs.IncludeByNameString(navColumns[0].PropertyName);
diff --git a/Src/Asp.Net/SqlSugar/ExpressionsToSql/DbMethods/DefaultDbMethod.cs b/Src/Asp.Net/SqlSugar/ExpressionsToSql/DbMethods/DefaultDbMethod.cs
index aab59ff34..83bba3dc4 100644
--- a/Src/Asp.Net/SqlSugar/ExpressionsToSql/DbMethods/DefaultDbMethod.cs
+++ b/Src/Asp.Net/SqlSugar/ExpressionsToSql/DbMethods/DefaultDbMethod.cs
@@ -753,6 +753,13 @@ namespace SqlSugar
             model.Args[0].MemberName = name;
             return AggregateSum(model);
         }
+        public virtual string AggregateAvgNoNull(MethodCallExpressionModel model) 
+        {
+            model.Args.Add(new MethodCallExpressionArgs() { MemberValue = 0, MemberName = 0 });
+            var name = IsNull(model);
+            model.Args[0].MemberName = name;
+            return AggregateAvg(model);
+        }
         public virtual string JsonListObjectAny(MethodCallExpressionModel model) 
         {
             throw new NotImplementedException("Current database no support");
diff --git a/Src/Asp.Net/SqlSugar/ExpressionsToSql/DbMethods/IDbMethods.cs b/Src/Asp.Net/SqlSugar/ExpressionsToSql/DbMethods/IDbMethods.cs
index f24f141f0..1a9dcef9d 100644
--- a/Src/Asp.Net/SqlSugar/ExpressionsToSql/DbMethods/IDbMethods.cs
+++ b/Src/Asp.Net/SqlSugar/ExpressionsToSql/DbMethods/IDbMethods.cs
@@ -105,6 +105,7 @@ namespace SqlSugar
         string JsonLike(MethodCallExpressionModel model);
         string Collate(MethodCallExpressionModel model);
         string AggregateSumNoNull(MethodCallExpressionModel model);
+        string AggregateAvgNoNull(MethodCallExpressionModel model);
         string JsonListObjectAny(MethodCallExpressionModel model);
         string JsonArrayAny(MethodCallExpressionModel model);
         string CompareTo(MethodCallExpressionModel model);
diff --git a/Src/Asp.Net/SqlSugar/ExpressionsToSql/DbMethods/SqlFunc.cs b/Src/Asp.Net/SqlSugar/ExpressionsToSql/DbMethods/SqlFunc.cs
index 8e8341007..b4bf50c2c 100644
--- a/Src/Asp.Net/SqlSugar/ExpressionsToSql/DbMethods/SqlFunc.cs
+++ b/Src/Asp.Net/SqlSugar/ExpressionsToSql/DbMethods/SqlFunc.cs
@@ -318,6 +318,7 @@ namespace SqlSugar
         public static TResult AggregateSumNoNull<TResult>(TResult thisValue) { throw new NotSupportedException("Can only be used in expressions"); }
         public static string Collate(string thisValue) { throw new NotSupportedException("Can only be used in expressions"); }
         public static TResult AggregateAvg<TResult>(TResult thisValue) { throw new NotSupportedException("Can only be used in expressions"); }
+        public static TResult AggregateAvgNoNull<TResult>(TResult thisValue) { throw new NotSupportedException("Can only be used in expressions"); }
         public static TResult AggregateMin<TResult>(TResult thisValue) { throw new NotSupportedException("Can only be used in expressions"); }
         public static TResult AggregateMax<TResult>(TResult thisValue) { throw new NotSupportedException("Can only be used in expressions"); }
         public static int AggregateCount<TResult>(TResult thisValue) { throw new NotSupportedException("Can only be used in expressions"); }