From f2983b612c8f9bf1706d3bffaa70f2cf49cf1bd4 Mon Sep 17 00:00:00 2001
From: sunkaixuan <610262374@qq.com>
Date: Thu, 1 Feb 2024 16:32:43 +0800
Subject: [PATCH] Synchronization code

---
 .../SqlSugar/Abstract/DbFirstProvider/DbFirstProvider.cs      | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Src/Asp.NetCore2/SqlSugar/Abstract/DbFirstProvider/DbFirstProvider.cs b/Src/Asp.NetCore2/SqlSugar/Abstract/DbFirstProvider/DbFirstProvider.cs
index 654af8e94..2bd06914d 100644
--- a/Src/Asp.NetCore2/SqlSugar/Abstract/DbFirstProvider/DbFirstProvider.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Abstract/DbFirstProvider/DbFirstProvider.cs
@@ -561,6 +561,10 @@ namespace SqlSugar
             }
             if (item.DataType == "bit")
                 return (convertString == "1" || convertString.Equals("true", StringComparison.CurrentCultureIgnoreCase)).ToString().ToLower();
+            if (convertString.EqualCase("NULL")) 
+            {
+                return "null";
+            }
             string result = this.Context.Ado.DbBind.GetConvertString(item.DataType) + "(\"" + convertString + "\")";
             return result;
         }