From 48af135835bc3128558b537bb182a18f6d39976f Mon Sep 17 00:00:00 2001
From: yuhao <754630941@qq.com>
Date: Wed, 20 Nov 2024 11:33:50 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E5=A4=8D=E7=A9=BA=E5=AD=97=E7=AC=A6?=
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---
 Services/RuleService.cs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Services/RuleService.cs b/Services/RuleService.cs
index ac665b7..24fafe0 100644
--- a/Services/RuleService.cs
+++ b/Services/RuleService.cs
@@ -40,7 +40,8 @@ namespace anydata.Services
         {
             foreach (var code in codes)
             {
-                formula = Regex.Replace(formula, $@"\b{Regex.Escape(code)}\b", data[code]?.ToString() ?? string.Empty);
+                var value = string.IsNullOrEmpty(data[code]?.ToString()) ? "null" : data[code].ToString();
+                formula = Regex.Replace(formula, $@"\b{Regex.Escape(code)}\b", value);
             }
 
             return formula;
-- 
Gitee