Asp.Net读取配置文件

为了不使自己写的代码看着臃肿，有些固定的值抽取出来，放入配置文件里，这样，不失为一种好的编码习惯。这里介绍两种不同的文件格式：

一、AppSetting.config(.config格式)

1、首先，配置一下

<?xml version="1.0" encoding="utf-8"?>
<appSettings>
  <!--纠错信息处理状态-->
  <add key="CorrectState" value="已处理:0;未处理:1" />
  <!--调用接口 地址配制-->
  <add key="Api_BaseUrl" value="http://172.16.16.68:8321/"/>
</appSettings>

2、读取唯一值

        /// <summary>
        /// 通过key,获取appSetting的值
        /// </summary>
        /// <param name="key">key</param>
        /// <returns>value</returns>
        public static string GetWebConfigValueByKey(string key)
        {
            string value = string.Empty;
            Configuration config = System.Web.Configuration.WebConfigurationManager.OpenWebConfiguration(HttpContext.Current.Request.ApplicationPath);
            AppSettingsSection appSetting = (AppSettingsSection)config.GetSection("appSettings");
            if (appSetting.Settings[key] != null)//如果不存在此节点，则添加  
            {
                value = appSetting.Settings[key].Value;
            }
            config = null;
            return value;
        }

3、读取多个值

 /// <summary>
        /// 如果值为 "已审核:1;待审核:0"  形式 ,可通过该函数获取该appsetting值的指定value对应的key
        /// </summary>
        /// <param name="appSettingName"></param>
        /// <returns></returns>
        public static string GetKVofKey(string appSettingName, string value)
        {
            List<KV> l = new List<KV>();
            string str = GetWebConfigValueByKey(appSettingName);
            string[] arr = str.Split(';');
            string rs = "";
            if (arr.Length > 0)
            {
                int length = arr.Length;
                for (int i = 0; i < length; i++)
                {
                    if (arr[i].Split(':')[1] == value)
                    {
                        rs = arr[i].Split(':')[0];
                    }
                }
            }
            return rs;
        }

所用类

1     public class KV
2     {
3         public string k;
4         public string v;
5     }

二、Api.ini

1、配置文件

#微信支付
[WeiXinPay]
appId=wx1***1
partnerid=1***1
appSecret=6***5 
key=N**C

2、ApiHelper.cs（类）

public class ApiHelper
    {
        /// <summary>
        /// 配置文件虚拟路径
        /// </summary>
        private const string ConfigFile = "~/Config/Api.ini";
        /// <summary>
        /// 获取配置节
        /// </summary>
        /// <typeparam name="T">节点类型（引用类型）</typeparam>
        /// <param name="section">节点名称</param>
        /// <returns></returns>
        public static T GetConfigureSection<T>(string section)
            where T:class
        {
            SharpConfig.Configuration configuration = GetIniConfiguration();
            return configuration[section].CreateObject<T>();
        }
        public static string GetPath(string path)
        {
            if (HttpContext.Current !=null)
            {
                return HttpContext.Current.Server.MapPath(path);
            }
            path = path.Replace("/","\");
            if (path.StartsWith("\"))
            {
                path = path.Substring(path.IndexOf('\', 1)).TrimStart('\');
            }
            return Path.Combine(AppDomain.CurrentDomain.BaseDirectory,path);
        }
        /// <summary>
        /// 
        /// </summary>
        /// <returns></returns>
        public static SharpConfig.Configuration GetIniConfiguration() 
        {
            const string SYSTEM_API_CONFIG = "SYSTEM_API_CONFIG";//配置Key
            //如果缓存存在，则提取缓存数据
            if (RuntimeCacheHelper.IsExists(SYSTEM_API_CONFIG))
            {
                return RuntimeCacheHelper.Get<SharpConfig.Configuration>(SYSTEM_API_CONFIG);
            }
                //从配置文件中加载，并缓存配置
            else
            {
                SharpConfig.Configuration configuration = null;
                String strConfigAbsolutePath = GetPath(ConfigFile);
                configuration = SharpConfig.Configuration.LoadFromFile(strConfigAbsolutePath);
                //缓存对象
                RuntimeCacheHelper.Save(SYSTEM_API_CONFIG,configuration,strConfigAbsolutePath,new TimeSpan(365,0,0,0,0));
                return configuration;
            }
        }
    }

缓存类

public class RuntimeCacheHelper
    {
        public static bool IsExists(string Name)
        {
            return (HttpRuntime.Cache[Name] != null);
        }
        public static T Get<T>(string Name)
        {
            if (null != HttpRuntime.Cache[Name]) { return (T)HttpRuntime.Cache[Name]; }
            return default(T);
        }

        public static void Save(string Name, object Value, string FileName, TimeSpan expirese)
        {
            var dependency = new CacheDependency(FileName);
            Save(Name,
                Value,
                dependency,
                expirese);
        }

        public static void Save(string Name, object Value)
        {
            HttpRuntime.Cache.Insert(Name, Value);
        }

        public static void Save(string Name, object Value, CacheDependency Dependency, TimeSpan expirese)
        {
            HttpRuntime.Cache.Insert(Name,
                Value,
                Dependency,
                (DateTime.Now + expirese),
                System.Web.Caching.Cache.NoSlidingExpiration);
        }
    }

3、请求上下文（HttpContextExtension）类

public static class HttpContextExtension
    {
        /// <summary>
        /// 请求上下文
        /// </summary>
        /// <param name="context"></param>
        /// <returns></returns>
        public static WeiXinPayConfig GetWeiXinPayConfig(this HttpContextBase context)
        {
            return ApiHelper.GetConfigureSection<WeiXinPayConfig>("WeiXinPay");
        }
    }

4、获取值

        /// <summary>
        /// 
        /// </summary>
        private Models.WeiXinPayConfig wxApiConfig { get; set; }
        /// <summary>
        /// 
        /// </summary>
        /// <returns></returns>
        public ActionResult GetConfig()
        {

            wxApiConfig = HttpContext.GetWeiXinPayConfig();
            
            return View();
        }