配置文件读取类

using System.Collections.Specialized;
using System.Configuration;

namespace Ming.BaseConfig
{
    public class ConfigEx
    {
        public static bool IsExistKey(string newKey)
        {
            NameValueCollection nvc = ConfigurationManager.AppSettings;
            foreach (string key in nvc.AllKeys)
            {
                if (key.Equals(newKey))
                    return true;
            }
            return false;
        }

        public static bool IsExistName(string name)
        {
            ConnectionStringSettingsCollection nvc = ConfigurationManager.ConnectionStrings;
            foreach (ConnectionStringSettings css in nvc)
            {
                if (css.Name == name)
                    return true;
            }
            return false;
        }

        public static string[] GetAppSettingsConfigKeys()
        {
            NameValueCollection nvc = ConfigurationManager.AppSettings;
            return nvc.AllKeys;
        }

        public static string[] GetConnectionStringsConfigNames()
        {
            ConnectionStringSettingsCollection nvc = ConfigurationManager.ConnectionStrings;
            string[] name = new string[nvc.Count];
            for (int i = 0; i < nvc.Count; i++)
                name[i] = nvc[i].Name;
            return name;
        }

        public static void DeleteConfigKey(string key)
        {
            Configuration confg = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
            confg.AppSettings.Settings.Remove(key);
            confg.Save(ConfigurationSaveMode.Modified);
            ConfigurationManager.RefreshSection("appSettings");
        }

        public static void AddConfigKey(string key, string value)
        {
            Configuration confg = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
            confg.AppSettings.Settings.Add(key, value);
            confg.Save(ConfigurationSaveMode.Modified);
            ConfigurationManager.RefreshSection("appSettings");
        }

        public static void DeleteConfigName(string name)
        {
            Configuration confg = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
            confg.ConnectionStrings.ConnectionStrings.Remove(name);
            confg.Save(ConfigurationSaveMode.Modified);
            ConfigurationManager.RefreshSection("ConnectionStrings");
        }

        public static void AddConfigName(string name, string constr, string providername)
        {
            ConnectionStringSettings css = new ConnectionStringSettings();
            css.Name = name;
            css.ConnectionString = constr;
            css.ProviderName = providername;
            Configuration confg = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
            confg.ConnectionStrings.ConnectionStrings.Add(css);
            confg.Save(ConfigurationSaveMode.Modified, true);
            ConfigurationManager.RefreshSection("ConnectionStrings");
        }

        public static void ReadXML()
        { }

        public static void WriteXML()
        { }

        public static void ReadRegistry()
        { }

        public static void WriteRegistry()
        { }
    }
}