获取WebConfig 配置项的值

 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Configuration;

 namespace DataInterface.Archives
 {
     public class Configuration
     {
         /// <summary>
         ///   索引器
         /// </summary>
         /// <param name="Configkey">配置项的key</param>
         /// <returns></returns>
         public string this[string configkey]
         {
             get { return GetFileConfigValue(configkey); }
         }

         private static Configuration _settings = new Configuration();
         /// <summary>
         /// 获取WebConfig 配置项的值。
         /// </summary>
         /// <param name="configkey">配置项的key</param>
         /// <returns></returns>
         private static string GetFileConfigValue(string configkey)
         {
             string configValue = ConfigurationManager.AppSettings[configkey];
             return configValue ?? "";
         }
     }
 }

用ConfigurationManager.AppSettings获取配置文件web.config中指定配置项的值。