的appSettings VS的applicationSettings的优点和缺点（.NET的app.config） [英] Pros and cons of appSettings vs applicationSettings (.NET app.config)

问题描述

在开发.NET Windows窗体应用程序，我们有那些的App.config 标签之间的选择来存储的配置值。哪一个更好呢？

 ＆lt;结构＆GT;

  ＆LT;！ - 选择1  - ＆GT;
  ＆LT;的appSettings＆GT;
    ＆LT;添加键=RequestTimeoutInMilliseconds值=10000/＆GT;
  ＆LT; /的appSettings＆GT;

  ＆LT;！ - 选择2  - ＆GT;
  ＆LT; configSections＆GT;
    ＆LT; sectionGroup名=的applicationSettingsTYPE =System.Configuration.ApplicationSettingsGroup，系统，版本= 2.0.0.0，文化=中性公钥= b77a5c5612342342＆GT;
        ＆lt;节名称=Project1.Properties.SettingsTYPE =System.Configuration.ClientSettingsSection，系统，版本= 2.0.0.0，文化=中性公钥= b77a5c5612342342requirePermission =FALSE/＆GT;
    ＆LT; / sectionGroup＆GT;
  ＆LT; / configSections＆GT;
  ＆LT;的applicationSettings＆GT;
    ＆LT; Project1.Properties.Settings＆GT;
      ＆lt;设定名=TABLEAserializeAs =字符串＆GT;
        ＆LT;价值＆GT; TABLEA＆LT; /值GT;
      ＆LT; /设置＆GT;
    ＆LT; /Project1.Properties.Settings>
  ＆LT; /的applicationSettings＆GT;

＆LT; /结构＆gt;
 

解决方案

基本＆LT;的appSettings＆GT; 是容易应付过去 - 只拍了＆LT;添加键=...值=.../＆GT; 条目，你就大功告成了。

缺点是：有没有类型检查，例如：你不能安全地假设你想有配置真的是一个数字的号码 - 有人可以把一个字符串转换成该设置.....你刚刚接触它作为 ConfigurationManager中[（关键）] 然后就看你知道你正在处理的是什么。

此外，随着时间的推移，在＆LT;的appSettings＆GT; 可以得到相当令人费解和杂乱，如果很多你的应用程序的部分开始把东西在里面（记得旧窗.ini文件： - ？））

如果可以的话，我会preFER和推荐使用自己的配置节 - 用.NET 2.0，它真的变得非常容易，这样一来，您可以：

• 一）定义在code的配置设置，并让它们类型安全 并检查
• b）你可以干净地从众人中分离的您的设置 别人的。你可以重复使用您的配置code，太！

有一系列你真的好文章，对非神秘化$ C $的CProject的.NET 2.0的配置系统：

1. 揭开.NET 2.0配置

   <奥秘/ LI>

2. 解码.NET 2.0配置

   <奥秘/ LI>

3. 开裂的.NET 2.0配置

   <奥秘/ LI>

强烈推荐！乔恩Rista做了伟大的工作，解释.NET 2.0。

配置系统

When developing a .NET Windows Forms Application we have the choice between those App.config tags to store our configuration values. Which one is better?

<configuration>

  <!-- Choice 1 -->
  <appSettings>
    <add key="RequestTimeoutInMilliseconds" value="10000"/>
  </appSettings>

  <!-- Choice 2 -->
  <configSections>
    <sectionGroup name="applicationSettings" type="System.Configuration.ApplicationSettingsGroup, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c5612342342" >
        <section name="Project1.Properties.Settings" type="System.Configuration.ClientSettingsSection, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c5612342342" requirePermission="false" />
    </sectionGroup>
  </configSections>
  <applicationSettings>
    <Project1.Properties.Settings>
      <setting name="TABLEA" serializeAs="String">
        <value>TABLEA</value>
      </setting>
    </Project1.Properties.Settings>
  </applicationSettings>

</configuration>

解决方案

The basic <appSettings> is easier to deal with - just slap in a <add key="...." value="..." /> entry and you're done.

The downside is: there's no type-checking, e.g. you cannot safely assume your number that you wanted to configure there really is a number - someone could put a string into that setting..... you just access it as ConfigurationManager["(key)"] and then it's up to you to know what you're dealing with.

Also, over time, the <appSettings> can get rather convoluted and messy, if lots of parts of your app start putting stuff in there (remember the old windows.ini file? :-)).

If you can, I would prefer and recommend using your own configuration sections - with .NET 2.0, it's really become quite easy, That way, you can:

• a) Define your configuration settings in code and have them type-safe and checked
• b) You can cleanly separate YOUR settings from everyone else's. And you can reuse your config code, too!

There's a series of really good articles on you to demystify the .NET 2.0 configuration system on CodeProject:

1. Unraveling the mysteries of .NET 2.0 configuration

2. Decoding the mysteries of .NET 2.0 configuration

3. Cracking the mysteries of .NET 2.0 configuration

Highly recommended! Jon Rista did a great job explaining the configuration system in .NET 2.0.

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