在运行时修改app.config会引发异常 [英] Modifying app.config at runtime throws exception

问题描述

我正在使用app.config文件存储和读取一些参数(SQL Server实例名称，用户，密码，日志目录等).现在，仅当我从bin/release目录运行.exe时，我才需要修改一些取决于用户的参数并对此进行管理.

I'm using app.config file to store and read some parameters (sql server instance name, user, password, log directory, etc). Now, I need to modify some parameters which depends of user and managed this but only if I run .exe from bin/release directory.

当我创建安装程序并安装我的应用程序时，我无法更改此参数-它抛出TargetInvocationException.我试图以管理员身份运行我的应用程序，但没有成功.

When I create setup and install my aplication I'm not able to change this parameters - it throws TargetInvocationException. I've tried to run my app as administrator but without success.

我当前使用的代码如下:

The code which I currently use is the following:

System.Configuration.Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
config.AppSettings.Settings.Remove("username");
config.AppSettings.Settings.Add("username", this.Config.Username);
config.Save(ConfigurationSaveMode.Modified);
ConfigurationManager.RefreshSection("appSettings");

我尝试了在stackoverflow上找到的其他一些解决方案，但没有成功.

I've tried a few other solutions found on stackoverflow but without success.

推荐答案

理想情况下，我们无法在应用程序运行时修改配置项.

Ideally we cannot modify config entries when application is running.

从bin中运行exe时，它没有修改* .exe.config.

When you ran the exe from bin, it didn't modify the *.exe.config .

相反，它修改了 *.vshost.exe.Config 文件.

System.Configuration.Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None); returns reference to *.vshost.exe.Config  file

*.exe.config是只读的，您无法更新此文件.

*.exe.config is read only, you cannot update this file.

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