using System;

using System.Configuration;

namespace HT.IMS.Utility

{

    /// <summary>

    /// 操作配置文件（修改）

    /// </summary>

    public class AppSettings

    {

        /// <summary>

        /// 设置配置文件AppSettings节点的键名和值并持久化到文件

        /// </summary>

        /// <param name="key">节点名称</param>

        /// <param name="value">节点值</param>

        public static void SetConfig(string key, string value)

        {

            try

            {

                //打开配置文件流

                Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);

                AppSettingsSection section = config.AppSettings;

                if (section != null && section.Settings[key] != null)

                {

                    section.Settings[key].Value = value;

                }

                else

                {

                    section.Settings.Add(new KeyValueConfigurationElement(key, value));

                }

                //保存修改后的节点

                config.Save(ConfigurationSaveMode.Modified);

                //刷新节点，以便下次从 ConfigurationManager.AppSettings 中取值时，

                //重新从磁盘读取节点的值

                ConfigurationManager.RefreshSection("appSettings");

            }

            catch (Exception ex)

            {

                throw ex;

            }

        }

        public static void SetConfigConnectionstring(string key, string value)

        {

            try

            {

                Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);

                ConnectionStringsSection section = config.ConnectionStrings;

                if (section != null && section.ConnectionStrings[key] != null)

                {

                    section.ConnectionStrings[key].ConnectionString = value;

                }

                else

                {

                    section.ConnectionStrings.Add(new ConnectionStringSettings(key, value, "System.Data.SqlClient"));

                }

                config.Save(ConfigurationSaveMode.Modified);

                ConfigurationManager.RefreshSection("connectionStrings");

            }

            catch (Exception ex)

            {

                throw ex;

            }

        }

    }

    /// <summary>

    /// 操作配置文件（读取）

    /// </summary>

    /// <typeparam name="T">返回什么类型的值</typeparam>

    public class AppSettings<T> : AppSettings

    {

        public static T GetConfig(string key, byte valType = )

        {

            try

            {

                Type type = typeof(T);

                object result = null; //返回特定类型的值

                object val = null; //配置节点的值

                if (valType == )

                    val = ConfigurationManager.AppSettings[key];

                else

                    val = ConfigurationManager.ConnectionStrings[key];

                if (type == typeof(int))

                    result = Convert.ToInt32(val);

                else if (type == typeof(string))

                    result = Convert.ToString(val);

                else if (type == typeof(double))

                    result = Convert.ToDouble(val);

                else

                    result = Convert.ChangeType(val, type);

                return (T)result;

            }

            catch

            {

                return default(T);

            }

        }

    }

}