c# - 如何通过app.config变量覆盖settings.settings变量

如何通过在生产中向app.config添加变量来更改（或重写）settings.settings变量？
这有可能吗？

最佳答案

必须直接引用要重写的applicationsettings，并显式指定具有替换值的属性。

<configuration>
  <!-- section definitions for all elements in <configuration> tag -->
  <configSections>
    <!-- section group, meaning: there will be a <applicationSettings> tag in you configuration-->
    <sectionGroup name="applicationSettings" type="System.Configuration.ApplicationSettingsGroup, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
      <!-- defines that there will be a <appname.Properties.Settings> tag inside your <applicationSettings> tag -->
      <section name="appname.Properties.Settings" type="System.Configuration.ClientSettingsSection, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
    </sectionGroup>
  </configSections>

  <applicationSettings>
    <appname.Properties.Settings>
      <!-- name of the property you want to override -->
      <setting name="setting1" serializeAs="String">
        <!-- new value -->
        <value>new string value</value>
      </setting>
    </appname.Properties.Settings>
  </applicationSettings>
</configuration>