C# 如何在c中配置App.config文件

我使用的是Visual Studio 2005，我用App.config文件创建了一个应用程序。 当我尝试编辑App.config文件并向其添加新值时，会显示一个错误，请帮助我

我的app.config文件包含：

<?xml version="1.0" encoding="utf-8" ?>
 <configuration>
  <appSettings>
   <add key="keyvalue" value="value"/>
    <add key="keyvalue1" value="value1"/>
 </appSettings>
 <mySettings>
   <add name="myname" myvalue="value1"/>
 </mySettings>
</configuration>

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不要创建MySettings组。将所需内容放入AppSettings组

您可以创建一个mySettings组，但如果您确实包含自定义的非标准配置节，则必须在configSections元素中声明它们，如所述或所示

---

但是，我会质疑这是否真的有必要，并继续我的第一个答案，除非有很好的理由添加自定义部分，因为遵循正常标准更好。这只会让未来的维护程序员更轻松。

您正在定义一个新的部分，它不是普通配置文件的一部分：

 <mySettings> 
   <add name="myname" myvalue="value1"/> 
 </mySettings> 

要合并你自己的部分，你需要写一些东西来阅读你的特定部分。然后添加对要处理该节的处理程序的引用，如下所示：

<configuration>
    <configSections>
       <section name="mySettings" type="MyAssembly.MySettingsConfigurationHander, MyAssembly"/>
    </configSections>
    <!-- Same as before -->
</configuration>

示例代码示例如下：

public class MySettingsSection
{
     public IEnumerable<MySetting> MySettings { get;set; }
}

public class MySetting
{
    public string Name { get;set; }
    public string MyValue { get;set; }
}

public class MySettingsConfigurationHander : IConfigurationSectionHandler
{
     public object Create(XmlNode startNode)
     {
          var mySettingsSection = new MySettingsSection();

          mySettingsSection.MySettings = (from node in startNode.Descendents()
                                         select new MySetting
                                         {
                                            Name = node.Attribute("name"),
                                            MyValue = node.Attribute("myValue")
                                         }).ToList();

         return mySettingsSection;
     }
}

public class Program
{
    public static void Main()
    {
        var section = ConfigurationManager.GetSection("mySettings") as MySettingsSection;

        Console.WriteLine("Here are the settings for 'MySettings' :");

        foreach(var setting in section.MySettings)
        {
            Console.WriteLine("Name: {0}, MyValue: {1}", setting.Name, setting.MyValue);
        }
    }
}

---

还有其他读取配置文件的方法，但这是徒手输入最简单的方法。

请注意，这些“错误”只是信息性消息。VisualStudio只是让您知道，它无法确定这些值是否应该是元素、属性以及应该存储的类型。忽略这些是安全的，但提供的答案提供了如何实现读取这些自定义值的指导。

public class MySettingsSection
{
     public IEnumerable<MySetting> MySettings { get;set; }
}

public class MySetting
{
    public string Name { get;set; }
    public string MyValue { get;set; }
}

public class MySettingsConfigurationHander : IConfigurationSectionHandler
{
     public object Create(XmlNode startNode)
     {
          var mySettingsSection = new MySettingsSection();

          mySettingsSection.MySettings = (from node in startNode.Descendents()
                                         select new MySetting
                                         {
                                            Name = node.Attribute("name"),
                                            MyValue = node.Attribute("myValue")
                                         }).ToList();

         return mySettingsSection;
     }
}

public class Program
{
    public static void Main()
    {
        var section = ConfigurationManager.GetSection("mySettings") as MySettingsSection;

        Console.WriteLine("Here are the settings for 'MySettings' :");

        foreach(var setting in section.MySettings)
        {
            Console.WriteLine("Name: {0}, MyValue: {1}", setting.Name, setting.MyValue);
        }
    }
}