C# 如何更改运行时应用程序设置
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How to change in runtime application settings
提问by rpf
I'm trying to change in runtime one key of my applications settings file, but it does not work.
我试图在运行时更改我的应用程序设置文件的一个键，但它不起作用。
I do on that way:
我这样做：
ConfigurationSettings.AppSettings["XPTO"] = "HELLO";
It seems that it only changes in memory, not on the file.
似乎它只在内存中更改，而不是在文件中更改。
Does anyone knows how to do this?
有谁知道如何做到这一点？
Thanks.
谢谢。
采纳答案by el2iot2
Take a look at my overview of .NET settings files...In short, I think you want a user-scoped setting. It will behave more like you expect.
看看我对 .NET 设置文件的概述……简而言之，我认为您需要一个用户范围的设置。它将表现得更像您期望的那样。
Edit:If you are using the settings designer in Visual Studio, then simply change the "Scope" to "User". If not, you should be able to do the equivalent programmatically.
编辑：如果您在 Visual Studio中使用设置设计器，那么只需将“范围”更改为“用户”。如果没有，您应该能够以编程方式执行等效操作。
回答by brendan
The AppSettings file is not designed to be writable. It is designed to store configurations that will not change at run time but might change over time ie: DB Connection Strings, web service URL's, etc.
AppSettings 文件不是可写的。它旨在存储在运行时不会更改但可能会随时间更改的配置，即：数据库连接字符串、Web 服务 URL 等。
So, while it may be possible to update the file in reality you should re-asses if this value should be stored there.
因此，虽然实际上可以更新文件，但您应该重新评估该值是否应该存储在那里。
回答by Joe
Assuming your app has write permissions on the file...
假设您的应用程序对该文件具有写入权限...
Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None); // the config that applies to all users
AppSettingsSection appSettings = config.AppSettings;
if (appSettings.IsReadOnly() == false)
{
appSettings("Key").Value = "new value";
config.Save();
}
I'm ignoring all the possible exceptions that can be thrown...
我忽略了所有可能抛出的异常......
