一個簡單的設定檔讀取類

做了個Windows服務使用app.config來儲存是否開啟調試輸出內容(寫記錄到資料庫),結果發現除非重新啟動Windows服務，不然app.config中的更改是不會被讀取的。
於是就自己整了個，裡面加入了檔案監視，這樣在你變更檔內容時，可以馬上讀到配置更改後的內容，調試Windows服務時挺方便的，更值得一提的是.net的檔案監視可以監視不存在的檔案，這樣你就可以隨意建立或刪除被監視檔案

View Code

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.ComponentModel;using System.Web;using System.Web.Caching;using System.Reflection;using System.IO;namespace F.Studio.Common.Cfg{   public class SimpleCfgMgr    {       private static readonly SimpleCfgMgr _Instance = new SimpleCfgMgr();       /// <summary>       /// 需要提供預設設定檔SConfig.txt       /// </summary>       /// <typeparam name="T"></typeparam>       /// <param name="key"></param>       /// <param name="def"></param>       /// <returns></returns>       public static T GetV<T>(string key, T def)       {           return _Instance.GetCfg<T>(key, def);       }       /// <summary>       /// 提供設定檔名稱,不包括路徑       /// 設定檔跟可執行檔需要在同一目錄下       /// 內容是       /// key=value 這樣一行一個配置       /// </summary>       /// <param name="configFilename"></param>       public SimpleCfgMgr(string configFilename)       {           this.ConfigFileanme = configFilename;           this.CacheKey = "SimpleCfgMgr_" + Guid.NewGuid().ToString("N");       }       /// <summary>       /// 使用Sconfig.txt設定檔       /// </summary>       private SimpleCfgMgr()        {               }       private  string ConfigFileanme="SConfig.txt";       private string _CacheKey="F.Studio.Common.Cfg.SimpleCfgMgr";       public string CacheKey       {           get           {               return _CacheKey;           }           private set           {               _CacheKey = value;           }       }       private string FileName       {           get           {               return Path.Combine(AppDomain.CurrentDomain.BaseDirectory, ConfigFileanme);           }       }       private List<CfgRawItem> RawList       {           get           {                var rawList = HttpRuntime.Cache[CacheKey ] as List<CfgRawItem>;                if (rawList == null)                {                    rawList = ParseContent();                    var monitorFilename = FileName;                    try                    {                        var fileCacheDep = new CacheDependency(monitorFilename);                        System.Web.HttpRuntime.Cache.Add(CacheKey, rawList, fileCacheDep, Cache.NoAbsoluteExpiration, Cache.NoSlidingExpiration, CacheItemPriority.High, null);                    }                    catch (Exception) { };                    //Console.WriteLine("讀取檔案!");                }               return rawList;           }       }       /// <summary>       /// 讀取器       /// </summary>       /// <param name="key"></param>       /// <param name="defV"></param>       /// <returns></returns>       public  T GetCfg<T>(string key, T defV)       {           var list=RawList;           if(list==null || list.Count==0)return defV;           foreach(var item in RawList)           {               if(string.Compare(key,item.Key,true)==0)               {                   return TryParser<T>(item.Value,defV);               }           }           return defV;       }       /// <summary>       /// 解析器       /// </summary>       /// <returns></returns>       private List<CfgRawItem> ParseContent()       {           var txt = LoadTextContent().Trim();           var lines = txt.Split(new string[]{Environment.NewLine}, StringSplitOptions.RemoveEmptyEntries);            List<CfgRawItem> list = new List<CfgRawItem>();            foreach (string line in lines)            {                if (string.IsNullOrWhiteSpace(line) || string.IsNullOrEmpty(line)) continue;                var str = line.Trim();                //忽略注釋                if (str.StartsWith("/") || str.StartsWith("-") || str.StartsWith("*")) continue;                var index = str.IndexOf("=");                if (index > 0 && str.Length > index + 1) //等號前後至少有一個非Null 字元                {                    var key = str.Substring(0, index);                    var value = str.Substring(index + 1, str.Length - index - 1);                    list.Add(new CfgRawItem(key.Trim(), value.Trim()));                }            }           return list;       }       /// <summary>       /// 載入器       /// </summary>       /// <returns></returns>       private string LoadTextContent()       {           if (!File.Exists(FileName))           {               return string.Empty;           }           try           {               var content = File.ReadAllText(FileName);               return content;           }           catch (Exception)           {               return string.Empty;           }       }       ~SimpleCfgMgr()       {           HttpRuntime.Cache.Remove(CacheKey);       }         #region HelpMethod       protected static T TryParser<T>(object v, T dValue)        {            if (v == null)            {                return dValue;            }            else            {                T t = default(T);                try                {                    if (t == null)//可空類型                    {                        Type type = typeof(T);                        TypeConverter conv = TypeDescriptor.GetConverter(type);                        t = (T)conv.ConvertFrom(v);                    }                    else                    {                        t = (T)Convert.ChangeType(v, typeof(T));                    }                }                catch                {                    t = dValue;                }                return t;            }        }       #endregion    }   #region Model   public class CfgRawItem   {       public CfgRawItem(string key, string value)       {           this.Key = key;           this.Value = value;       }       public string Key { get; set; }       public string Value { get; set; }   }   #endregion}