AppSetting配置工具类

 <?xml version="1.0" encoding="utf-8"?>
 <!--
   有关如何配置 ASP.NET 应用程序的详细信息，请访问
   http://go.microsoft.com/fwlink/?LinkId=169433
   -->
 <configuration>
   <appSettings>
     <add key="key1" value="value1"/>
   </appSettings>
 </configuration>

web.config示例

一、缓存类

 using System;
 using System.Collections;
 using System.Configuration;
 using System.Web;
 using System.Web.Caching;

 namespace Common
 {
     /// <summary>
     /// 缓存帮助类
     /// author:陈彦斌
     /// 时间:2019年7月14日14:25:30
     /// HttpRuntime.Cache
     /// </summary>
     public sealed class CacheHelper
     {
         /// <summary>
         /// 获取configuratio节点下appSettings中add的值
         /// </summary>
         /// <param name="key">AppSettings的键</param>
         /// <returns></returns>
         public static object GetAppSttings(string key)
         {
             return ConfigurationManager.AppSettings[key];
         }
         /// <summary>
         /// 获取当前应用程序指定CacheKey的值
         /// </summary>
         /// <param name="CacheKey">appSettings节点下add中的键</param>
         /// <returns></returns>
         public static object GetCache(string CacheKey)
         {
             Cache objCache = HttpRuntime.Cache;
             return objCache[CacheKey];
         }
         /// <summary>
         /// 设置数据缓存(慎用)
         /// </summary>
         /// <param name="CacheKey">键</param>
         /// <param name="CacheValue">值</param>
         public static void SetCache(string CacheKey,object CacheValue)
         {
             Cache objCache = HttpRuntime.Cache;
             objCache.Insert(CacheKey, CacheValue);
         }
         /// <summary>
         /// 设置数据缓存
         /// </summary>
         /// <param name="CacheKey">键</param>
         /// <param name="CacheValue">值</param>
         /// <param name="TimeOut">时间间隔</param>
         public static void SetCache(string CacheKey, object CacheValue, TimeSpan TimeOut)
         {
             Cache objCache = HttpRuntime.Cache;
             objCache.Insert(CacheKey, CacheValue, null, DateTime.MaxValue, TimeOut, CacheItemPriority.NotRemovable, null);
         }
         /// <summary>
         /// 设置数据缓存
         /// </summary>
         /// <param name="CacheKey">键</param>
         /// <param name="CacheValue">值</param>
         /// <param name="absoluteExpiration">绝对过期时间</param>
         /// <param name="slidingExpiration">时间间隔</param>
         public static void SetCache(string CacheKey, object CacheValue, DateTime absoluteExpiration, TimeSpan slidingExpiration)
         {
             Cache objCache = HttpRuntime.Cache;
             objCache.Insert(CacheKey, CacheValue, null, absoluteExpiration, slidingExpiration);
         }
         /// <summary>
         /// 移除全部缓存
         /// </summary>
         public static void RemovaAllCache()
         {
             Cache objCache = HttpRuntime.Cache;
             IDictionaryEnumerator CacheEnum = objCache.GetEnumerator();
             while (CacheEnum.MoveNext())
             {
                 objCache.Remove(CacheEnum.Key.ToString());
             }
         }
         /// <summary>
         /// 移除指定键的缓存
         /// </summary>
         /// <param name="CacheKey">键</param>
         public static void RemovaAllCache(string CacheKey)
         {
             Cache objCache = HttpRuntime.Cache;
             objCache.Remove(CacheKey);
         }
     }
 }

二、AppSetting配置类

 using System;

 namespace Common
 {
     /// <summary>
     /// web.config操作类
     /// 使用前需引用程序集：System.configuration
     /// </summary>
     public sealed class ConfigHelper
     {
         /// <summary>
         /// 获取AppSettings中配置String信息
         /// </summary>
         /// <param name="key">键</param>
         /// <returns></returns>
         public static string GetConfigString(string key)
         {
             object objValue = CacheHelper.GetCache(key);
             if (objValue == null) //缓冲区没有值
             {
                 objValue = CacheHelper.GetAppSttings(key);
                 if (objValue != null)
                 {
                     CacheHelper.SetCache(key, objValue, DateTime.Now.AddMinutes(), TimeSpan.Zero);
                 }
             }
             return objValue.ToString();
         }
         /// <summary>
         /// 获取AppSettings中配置Bool信息
         /// </summary>
         /// <param name="key">键</param>
         /// <returns></returns>
         public static bool GetConfigBool(string key)
         {
             object objValue= CacheHelper.GetAppSttings(key);
             if (StringUtil.isNullOrBlank(objValue))
             {
                 try
                 {
                     bool.Parse(objValue.ToString());
                     return true;
                 }
                 catch
                 {
                     return false;
                 }
             }
             return false;
         }
         /// <summary>
         /// 获取AppSettings中配置decimal信息
         /// </summary>
         /// <param name="key"></param>
         /// <returns></returns>
         public static decimal GetConfigDecimal(string key)
         {
             object objValue = CacheHelper.GetAppSttings(key);
             if (StringUtil.isNullOrBlank(objValue))
             {
                 try
                 {
                     return decimal.Parse(objValue.ToString());
                 }
                 catch
                 {
                     return ;
                 }
             }
             return ;
         }
         /// <summary>
         /// 获取AppSettings中配置DateTime信息,可空
         /// </summary>
         /// <param name="key">键</param>
         /// <returns></returns>
         public static DateTime? GetConfigDateTime(string key)
         {
             DateTime? DateTimeNull = null;
             object objValue = CacheHelper.GetAppSttings(key);
             if (StringUtil.isNullOrBlank(objValue))
             {
                 try
                 {
                     return DateTime.Parse(objValue.ToString());
                 }
                 catch
                 {
                     return DateTimeNull;
                 }
             }
             return DateTimeNull;
         }
     }
 }