公用类库(1) 配置文件操作类AppConfigUtil

　　配置文件的操作主要有获取根目录和获取配置key的值value，下面是总结的配置文件操作类AppConfigUtil的代码。

namespace Tmac.Utilities
{
    /// <summary>
    /// 配置文件操作类
    /// </summary>
    public class AppConfigUtil
    {
        /// <summary>
        /// get base directory
        /// </summary>
        public static string baseDirectory = AppDomain.CurrentDomain.BaseDirectory;

        #region Private method
        
        /// <summary>
        /// get value by key
        /// </summary>
        /// <param name="key">key</param>
        /// <returns>path</returns>
        private static string GetAppSetting(string key)
        {
            if (ConfigurationManager.AppSettings.Count == 0 || !ConfigurationManager.AppSettings.HasKeys())
            {
                return string.Empty;
            }
            if (!ConfigurationManager.AppSettings.AllKeys.Any(p => p.Equals(key)))
            {
                return string.Empty;
            }
            return ConfigurationManager.AppSettings[key];
        }

        /// <summary>
        /// get complete path by key
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        private static string GetCompletePath(string key)
        {

            string value = GetAppSetting(key);
            if (String.IsNullOrEmpty(value))
            {
                value = baseDirectory;
            }
            else if (!Regex.IsMatch(value, @"\A[a-zA-Z]\:\\"))
            {
                value = Path.Combine(baseDirectory,value);
            }
            return value;
        }

        #endregion

        #region Public Property
        
        public static string TestKey
        {
            get
            {
                return GetAppSetting("TestKey");
            }
        }

        public static string FilePath
        {
            get
            {
                return GetAppSetting("FilePath");
            }
        }

        public static Boolean IsCustomException
        {
            get
            {
                return "true".Equals(GetAppSetting("IsCustomException"), StringComparison.OrdinalIgnoreCase);
            }
        }
        #endregion
    }
}