我该如何选择一个命令行参数.Net应用程序的配置文件？ [英] How do I select a .Net application configuration file from a command line parameter?

问题描述

我想传递一个命令行参数来覆盖使用标准的app.config的。如何更改默认的应用程序配置文件，这样，当我访问ConfigurationManager.AppSettings我访问命令行上指定的配置文件？

I would like to override the use of the standard app.config by passing a command line parameter. How do I change the default application configuration file so that when I access ConfigurationManager.AppSettings I am accessing the config file specified on the command line?

编辑：

事实证明，正确的方式来加载配置文件比EXE文件加的.config是使用OpenMappedExeConfiguration的名称不同。例如。

It turns out that the correct way to load a config file that is different than the name of the EXE plus .config is to use OpenMappedExeConfiguration. E.g.

ExeConfigurationFileMap configFile = new ExeConfigurationFileMap();
configFile.ExeConfigFilename = Path.Combine(Environment.CurrentDirectory, "Shell2.exe.config");
currentConfiguration = ConfigurationManager.OpenMappedExeConfiguration(configFile,ConfigurationUserLevel.None);

这部分工作。我可以看到所有的的appSettings的关键部分，但所有的值都为空。

This partially works. I can see all of the keys in the appSettings section but all the values are null.

推荐答案

因此​​，这里是code，实际上可以让我真正访问appSettings部分比默认的。

So here is the code that actually allows me to actually access the appSettings section in a config file other than the default one.

ExeConfigurationFileMap configFile = new ExeConfigurationFileMap();
configFile.ExeConfigFilename = Path.Combine(Environment.CurrentDirectory, "Alternate.config");
Configuration config = ConfigurationManager.OpenMappedExeConfiguration(configFile,ConfigurationUserLevel.None);

AppSettingsSection section = (AppSettingsSection)config.GetSection("appSettings");
string MySetting = section.Settings["MySetting"].Value;

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