变量的更改

CapMachine.Core/ConfigHelper.cs

@@ -55,5 +55,14 @@ namespace CapMachine.Core
             ConfigurationManager.AppSettings.Remove(key);
         }
 
+        /// <summary>
+        /// 判断Key是否存在
+        /// </summary>
+        /// <param name="key"></param>
+        /// <returns></returns>
+        public static bool IsExist(string key)
+        {
+            return ConfigurationManager.AppSettings[key] != null;
+        }
     }
 }