【原创】App.Config文件的读写

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

namespace  ServicesConfiguration
{
    public class ConfigurationDispose
    {
        public ConfigurationDispose()
        {
        }

        GetConfigurationGetConfiguration#region GetConfiguration
        /**//**//**//// <summary>
        /// 取得appSettings里的值
        /// </summary>
        /// <param name="key">键</param>
        /// <returns>值</returns>
        public static string GetConfiguration(string key)
        {
            return ConfigurationManager.AppSettings[key];
        }
        #endregion

        GetConfigurationListGetConfigurationList#region GetConfigurationList
        /**//**//**//// <summary>
        /// 取得appSettings里的值列表
        /// </summary>
        /// <param name="filePath">配置文件路径</param>
        /// <returns>值列表</returns>
        public static KeyValueConfigurationCollection GetConfigurationList(string filePath)
        {
            AppSettingsSection appSection = null;                       //AppSection对象
            Configuration configuration = null;                         //Configuration对象     
            KeyValueConfigurationCollection k = null;                   //返回的键值对类型

            configuration = ConfigurationManager.OpenExeConfiguration(filePath);

            //取得AppSettings节
            appSection = (AppSettingsSection)configuration.Sections["appSettings"];

            //取得AppSetting节的键值对
            k = appSection.Settings;

            return k;
                    
        }
        #endregion

        SetConfigurationSetConfiguration#region SetConfiguration
        /**//**//**//// <summary>
        /// 设置appSetting的值
        /// </summary>
        /// <param name="key">键</param>
        /// <param name="value">值</param>
        /// <param name="filePath">App.config文件路径</param>
        public static void SetConfiguration(string key, string value,string filePath)
        {
            Configuration configuration = null;                 //Configuration对象
            AppSettingsSection appSection = null;               //AppSection对象
          
            configuration = ConfigurationManager.OpenExeConfiguration(filePath);
            
            //取得AppSetting节
            appSection = configuration.AppSettings;

            //赋值并保存
            appSection.Settings[key].Value = value;
            configuration.Save();
            

        }
        #endregion

        SetConfigurationSetConfiguration#region SetConfiguration
        /**//**//**//// <summary>
        /// 设置appSetting的值
        /// </summary>
        /// <param name="key">键</param>
        /// <param name="value">值</param>
        public static void SetConfiguration(string key, string value)
        {
            AppSettingsSection appSection = null;               //AppSection对象

            appSection = ConfigurationManager.GetSection("appSettings");

            appSection.Settings[key].Value = value;

        }
        #endregion
    }

}

自己做的小例子，很简单，就是一个读取其中配置信息

 

App.Config
<? xml version="1.0" encoding="utf-8"  ?>
< configuration >
   < appSettings >
     < add  key ="User"  value ="Mgod" />
    
   </ appSettings >

</ configuration >

using System.Configuration


        private void button1_Click(object sender, EventArgs e)
        {
            //this.textBox1.Text = ConfigurationManager.AppSettings["User"];//使用它必须引用System.configuration程序集
            this.textBox1.Text= ConfigurationSettings.AppSettings["User"];//虽然已过失，但是还能用！
        }

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