diff --git a/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/DbMethods/DefaultDbMethod.cs b/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/DbMethods/DefaultDbMethod.cs
index d90c9afb9..41a080288 100644
--- a/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/DbMethods/DefaultDbMethod.cs
+++ b/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/DbMethods/DefaultDbMethod.cs
@@ -552,7 +552,7 @@ namespace SqlSugar
             var parameter4 = model.Args[3];
             return $" STUFF ({parameter1.MemberName}, {parameter2.MemberName}, {parameter3.MemberName},  {parameter4.MemberName}) ";
         }
-        public string GetDateString(string dateValue) 
+        public virtual string GetDateString(string dateValue, string format)
         {
             return null;
         }
diff --git a/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/DbMethods/IDbMethods.cs b/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/DbMethods/IDbMethods.cs
index 01aea3681..f81157a69 100644
--- a/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/DbMethods/IDbMethods.cs
+++ b/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/DbMethods/IDbMethods.cs
@@ -86,6 +86,6 @@ namespace SqlSugar
         string Asc(MethodCallExpressionModel model);
         string Desc(MethodCallExpressionModel model);
         string Stuff(MethodCallExpressionModel model);
-        string GetDateString(string dateValue);
+        string GetDateString(string dateValue,string format);
     }
 }
diff --git a/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/ResolveItems/MethodCallExpressionResolve.cs b/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/ResolveItems/MethodCallExpressionResolve.cs
index dd75c9233..55a83a530 100644
--- a/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/ResolveItems/MethodCallExpressionResolve.cs
+++ b/Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/ResolveItems/MethodCallExpressionResolve.cs
@@ -325,7 +325,7 @@ namespace SqlSugar
                     {
                         var format = (args[0] as ConstantExpression).Value + "";
                         var value = GetNewExpressionValue(express.Object);
-                        var dateString2=this.Context.DbMehtods.GetDateString(value);
+                        var dateString2=this.Context.DbMehtods.GetDateString(value,format);
                         if (dateString2 == null)
                         {
                             var dateString = GeDateFormat(format, value);
@@ -908,7 +908,7 @@ namespace SqlSugar
                     case "ToString":
                         if (model.Args.Count > 1)
                         {
-                            var dateString2 = this.Context.DbMehtods.GetDateString(model.Args.First().MemberName.ObjToString());
+                            var dateString2 = this.Context.DbMehtods.GetDateString(model.Args.First().MemberName.ObjToString(), model.Args.Last().MemberValue.ObjToString());
                             if (dateString2 != null) return dateString2;
                             return GeDateFormat(model.Args.Last().MemberValue.ObjToString(), model.Args.First().MemberName.ObjToString());
                         }