C# 读写配置文件

C# 读写配置文件

作者：MarsDuan

出处：http://blog.youkuaiyun.com/DuanMars

ConfigurationManager默认没有自动载入项目，使用前必须手动添加，方法如下：

项目->引用->添加引用->选择System.configuration

using System;

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

namespace Test
{
    /// <summary>
    /// 对exe.config文件进行读写操作
    /// </summary>
    class ConfigSet
    {
        /// <summary>
        /// 写操作
        /// </summary>
        /// <param name="key"></param>
        /// <param name="value"></param>
        public static void SetConfig(string key,string value)
        {
            Configuration config = ConfigurationManager.OpenExeConfiguration(Application.ExecutablePath);
            AppSettingsSection appSettings = (AppSettingsSection)config.GetSection("appSettings");
            if (appSettings.Settings[key] == null)
            {
                appSettings.Settings.Add(key, value);
            }
            else
                appSettings.Settings[key].Value = value;
            config.Save(ConfigurationSaveMode.Modified);
            ConfigurationManager.RefreshSection("appSettings");
        }
        /// <summary>
        /// 读取指定key的值
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        public static string GetConfig(string key)
        {
            Configuration config = ConfigurationManager.OpenExeConfiguration(Application.ExecutablePath);
            AppSettingsSection appSettings = (AppSettingsSection)config.GetSection("appSettings");
            if (appSettings.Settings[key] == null)
                return null;
            else
                return appSettings.Settings[key].Value;
        }
    }
}