修改

Author: toolgood

csharp/ToolGood.Algorithm2/Internals/MathVisitor.cs

@@ -3611,6 +3611,7 @@ public Operand VisitLOOKUP_fun([NotNull] mathParser.LOOKUP_funContext context)
                                     if (v.IsLong) return Operand.Create(double.Parse(v.ToString(), NumberStyles.Any, cultureInfo));
                                     if (v.IsObject) return Operand.Create(v);
                                     if (v.IsArray) return Operand.Create(v);
+                                    if (v.IsNull) return Operand.CreateNull();
                                     return Operand.Create(v);
                                 }
                             }

csharp/ToolGood.Algorithm2/Operand.cs

@@ -202,6 +202,8 @@ public Operand ToArray(string errorMessage)
                             list.Add(Operand.Create(double.Parse(v.ToString(), NumberStyles.Any, cultureInfo)));
                         else if (v.IsLong)
                             list.Add(Operand.Create(double.Parse(v.ToString(), NumberStyles.Any, cultureInfo)));
+                        else if (v.IsLong)
+                            list.Add(Operand.CreateNull());
                         else
                             list.Add(Operand.Create(v));
                     }
@@ -210,7 +212,7 @@ public Operand ToArray(string errorMessage)
             }
             return Error(errorMessage);
         }
- 
+
 
         public void Dispose() { }
     }