为什么应用程序设置只读的app.config？ [英] Why are application settings read-only in app.config?

问题描述

我在我的app.config中的一些设置，我打算成为全球性 - 即。任何用户都可以改变他们，并且所有用户获得相同的设置。

不过，除非我改变他们为用户设置，它们是只读的。

这是为什么？

和我应该如何去坚持我的应用程序的全局设置？

编辑：

这实际上是为运行作为LocalSystem服务Windows服务应用程序。它也可以由本地管理员以参数/配置，这将启动一个Windows表单编辑配置值手动运行。

因此​​，将有写权限< 。code>％PROGRAMFILES％在这两种情况下

我访问我的设置方式是正是如此：

  Settings.Default.MySetting = MyNewValue; 
  

当MySetting设置为应用程序（在我的项目属性，Settings.settings），我得到一个编译时错误MySetting是只读的。

我是新来这个东西，还没有找到它应该是怎样做一个很好的解释。例如，为什么我需要说默认，又是什么，实际上意味着什么呢？我不知道。如果任何人都可以点我一个app.config使用教程，这将是真正的帮助。

解决方案

真正的完整的答案：

在app.config设置只读的，因为有2个类型的设置：

<醇>

应用程序设置

用户设置

第一个也不会，除非应用程序更改发布者发布的一个新的版本。第二不被存储在在app.config，但在一个user.config文件。在这种user.config文件的app.config提供了默认值的abscence

如果MySetting为用户设置：

  Settings.Default.MySetting = MyNewValue; 
 Settings.Default.Save（）; 
  

这将创建一个 user.config 文件在 [用户本地设置应用程序数据] \ [公司名称] \ [应用] .exe文件[哈希字符串] \ [版本] 通过新的设置，以及那些设置将战胜在的app.config 文件中的设置。

I have some settings in my app.config which I intend to be 'global' - ie. any user can change them, and all users get the same setting.

But unless I change them to be user settings, they are read only.

Why is this?

And how should I go about persisting my app's global settings?

Edit:

This is actually a windows service application which runs as a service as LocalSystem. It can also be run manually by a local admin with argument "/config", which launches a windows form to edit configuration values.

So it will have write access to %PROGRAMFILES% in both situations.

The way I am accessing my settings is thusly:

Settings.Default.MySetting = MyNewValue;

And when MySetting is set to Application (in my project properties, Settings.settings), I get a compile-time error "MySetting is read only".

I am new to this stuff, and have not yet found a very good explanation of how it is supposed to be done. For example, why do I need to say 'Default', and what does that actually mean? I have no idea. If anyone can point me to an app.config usage tutorial, that would be really helpful.

解决方案

The real complete answer:

The app.config settings are read-only because there are 2 types of settings:

1. Application Settings
2. User Settings

The first won't change unless the application publisher publishes a new version of it. The second is not stored in the app.config, but in a user.config file. In the abscence of this user.config file the app.config provides the default value.

If MySetting is a User Setting:

Settings.Default.MySetting = MyNewValue;
Settings.Default.Save();

It will create a user.config file at [User Local Settings Application Data]\[company name]\[application].exe[hash string]\[version] with the new settings, and those settings will prevail over the settings in the app.config file.

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