如何重新加载/刷新app.config？

Question

我想读取app.config值,在消息框中显示它,使用外部文本编辑器更改值,最后显示更新的值.

我尝试使用以下代码:

private void button2_Click(object sender, EventArgs e)
{
    Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
    ConfigurationManager.RefreshSection("appSettings");
    ConfigurationManager.RefreshSection(config.AppSettings.SectionInformation.Name);
    MessageBox.Show(ConfigurationManager.AppSettings["TheValue"]);
}

但它不起作用.它显示旧值(在外部文本编辑器中更改之前).有什么建议？

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<appSettings>
  <add key="TheValue" value="abc"/>
</appSettings>
</configuration>

Answer 1

它可能会帮助你

尝试保存这样的配置

System.Configuration.Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
config.AppSettings.Settings["KeyName"].Value = "NewValue";
config.AppSettings.SectionInformation.ForceSave = true;
config.Save(ConfigurationSaveMode.Modified);

然后像这样获取它

ConfigurationManager.RefreshSection("appSettings");
System.Configuration.Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);

Answer 2

您可以尝试使用以下代码：

Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
KeyValueConfigurationCollection settings = config.AppSettings.Settings;            
// update SaveBeforeExit
settings["TheValue"].Value = "WXYZ";
config.Save(ConfigurationSaveMode.Modified);

MessageBox.Show(ConfigurationManager.AppSettings["TheValue"]);