C# App.config 配置文件

 

<?xml version="1.0" encoding="utf-8"?>
<configuration>

  <connectionStrings>

  </connectionStrings>

  <appSettings>  
    <add key="沉鱼" value="西施"/>
    <add key="落雁" value="昭君"/>
    <add key="闭月" value="貂蝉"/>
    <add key="羞花" value="杨贵妃"/>
  </appSettings>
  
</configuration>

1.添加引用 => .NET 组件 => System.Configuration

2.获取配置文件对象

ConfigurationUserLevel configurationUserLevel = ConfigurationUserLevel.None;
Configuration configuration = ConfigurationManager.OpenExeConfiguration(configurationUserLevel);

 

3.读取配置文件　　

string name = configuration.AppSettings.Settings["闭月"].Value;

4.新增

configuration.AppSettings.Settings.Add("四大美女", "沉鱼落雁，闭月羞花");
configuration.Save();

5.修改

configuration.AppSettings.Settings["闭月"].Value = "小貂蝉";
configuration.Save();