fix error route

Controllers/BaseController.cs

@@ -65,6 +65,17 @@ namespace YYApi.Controllers
             }
         }
 
+        /// <summary>
+        /// 检测给定的变量是否为NUll
+        /// </summary>
+        /// <param name="condition">检测条件</param>
+        /// <param name="code">错误代码</param>
+        /// <param name="message">错误描述</param>
+        protected static void ErrorWhenNull(object condition, int code, string message = null)
+        {
+            ErrorWhen(condition == null, code, message);
+        }
+
         /// <summary>
         /// 错误回馈页面
         /// </summary>
@@ -78,5 +89,10 @@ namespace YYApi.Controllers
             response.SetCode(code);
             return response;
         }
+
+        protected BaseResponse<string> UploadFile()
+        {
+            return new BaseResponse<string>();
+        }
     }
 }