From 45ba7d260d9f13b189e6c9ba56b1396aac561334 Mon Sep 17 00:00:00 2001
From: sunkaixuan <610262374@qq.com>
Date: Wed, 20 Sep 2017 13:45:21 +0800
Subject: [PATCH] -

---
 .../SqlSugar/Abstract/DbFirstProvider/DbFirstProvider.cs        | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Src/Asp.Net/SqlSugar/Abstract/DbFirstProvider/DbFirstProvider.cs b/Src/Asp.Net/SqlSugar/Abstract/DbFirstProvider/DbFirstProvider.cs
index b1bcc287d..ebbbfec57 100644
--- a/Src/Asp.Net/SqlSugar/Abstract/DbFirstProvider/DbFirstProvider.cs
+++ b/Src/Asp.Net/SqlSugar/Abstract/DbFirstProvider/DbFirstProvider.cs
@@ -177,7 +177,7 @@ namespace SqlSugar
                             PropertyDescriptionText = GetPropertyDescriptionText(item, PropertyDescriptionText);
                             PropertyText = PropertyDescriptionText + PropertyText;
                             classText = classText.Replace(DbFirstTemplate.KeyPropertyName, PropertyText + (isLast ? "" : ("\r\n" + DbFirstTemplate.KeyPropertyName)));
-                            if (ConstructorText.IsValuable() && item.DefaultValue.IsValuable())
+                            if (ConstructorText.IsValuable() && item.DefaultValue!=null)
                             {
                                 var hasDefaultValue = columns.Skip(index + 1).Any(it=>it.DefaultValue.IsValuable());
                                 ConstructorText = ConstructorText.Replace(DbFirstTemplate.KeyPropertyName, propertyName);