.NET下Web.config与App.Config的增删改操作

.NET 2.0之后，Web.config和App.Config的增删改操作是相当的方便，使用好了能达到事半功倍的效果。下面是一个App.Config，其实就是一个XML文件

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <appSettings>
    <add key="status" value="0" />
    <add key="checkPath" value="C:\" />
  </appSettings>
</configuration>

看相关的操作：

Web.config（ASP.NET）：

//读
System.Web.Configuration.WebConfigurationManager.AppSettings[“y”];
//增
Configuration config = WebConfigurationManager.OpenWebConfiguration(null); 
AppSettingsSection app = config.AppSettings; 
app.Settings.Add("x", "this is X"); 
config.Save(ConfigurationSaveMode.Modified); 
//改
Configuration config = WebConfigurationManager.OpenWebConfiguration(null); 
AppSettingsSection app = config.AppSettings; 
//app.Settings.Add("x", "this is X"); 
app.Settings["x"].Value = "this is not Y"; 
config.Save(ConfigurationSaveMode.Modified); 
//删
Configuration config = WebConfigurationManager.OpenWebConfiguration(null); 
AppSettingsSection app = config.AppSettings; 
app.Settings.Remove("x"); 
config.Save(ConfigurationSaveMode.Modified); 
//ConfigurationManager.RefreshSection("appSettings");

App.config（WINFORM）：

//读
System.Configuration.ConfigurationManager.AppSettings[“y”];
//增
Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None); 
AppSettingsSection app = config.AppSettings; 
app.Settings.Add("x", "this is X"); 
config.Save(ConfigurationSaveMode.Modified); 
//改
Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None); 
AppSettingsSection app = config.AppSettings; 
//app.Settings.Add("x", "this is X"); 
app.Settings["x"].Value = "this is not Y"; 
config.Save(ConfigurationSaveMode.Modified); 
//删
Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None); 
AppSettingsSection app = config.AppSettings; 
app.Settings.Remove("x"); 
config.Save(ConfigurationSaveMode.Modified);
//ConfigurationManager.RefreshSection("appSettings");

注意，如果提示找不到ConfigurationManager，记得添加System.configuration.dll引用，如图：