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ConfigurationManager

ConfigurationManager读取和写入

 
  提供对客户端应用程序配置文件的访问
  通过引入System.Configuration.dll可以用ConfigurationManager类来读取项目中保存在App.config中的配置信息,如:
 
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <appSettings>
    <add key="Number0" value=http://www.mamicode.com/"9759436"/>
    <add key="Number1" value=http://www.mamicode.com/"9759437"/>
    <add key="Number2" value=http://www.mamicode.com/"9759438"/>
    <add key="Number3" value=http://www.mamicode.com/"9759439"/>
  </appSettings>
    <startup>
        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
    </startup>
</configuration>

 

 
 
后台:
 
读取数据:  
private void Button_Click_1(object sender, RoutedEventArgs e)
 {
        int i = int.Parse(ConfigurationManager.AppSettings["Number2"]);
        this.txtMsg.Text = i.ToString();
 }

 

写入数据: 
Configuration cfa = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
cfa.AppSettings.Settings["Number2"].Value = http://www.mamicode.com/"65434";
cfa.Save();