diff --git a/Src/Asp.Net/SqlSugar/Abstract/SqlBuilderProvider/SqlBuilderProvider.cs b/Src/Asp.Net/SqlSugar/Abstract/SqlBuilderProvider/SqlBuilderProvider.cs
index cbb03c6b2..04c3d73cf 100644
--- a/Src/Asp.Net/SqlSugar/Abstract/SqlBuilderProvider/SqlBuilderProvider.cs
+++ b/Src/Asp.Net/SqlSugar/Abstract/SqlBuilderProvider/SqlBuilderProvider.cs
@@ -189,7 +189,7 @@ namespace SqlSugar
                         case ConditionalType.In:
                             if (item.FieldValue == null) item.FieldValue = string.Empty;
                             var inValue1 = string.Empty;
-                            if (item.CSharpTypeName.EqualCase("string"))
+                            if (item.CSharpTypeName.EqualCase("string")|| item.CSharpTypeName==null)
                             {
                                 inValue1 = ("(" + item.FieldValue.Split(',').Distinct().ToArray().ToJoinSqlInVals() + ")");
                             }