如何以编程方式将sectionGroup添加到web.config中

Question

背景

我想将以下内容插入到我的 web.config 中

  <sectionGroup name="elmah">
    <section name="security" requirePermission="false" type="Elmah.SecuritySectionHandler, Elmah"/>
    <section name="errorLog" requirePermission="false" type="Elmah.ErrorLogSectionHandler, Elmah"/>
    <section name="errorMail" requirePermission="false" type="Elmah.ErrorMailSectionHandler, Elmah"/>
  </sectionGroup>

（猜测我想要实现的目标没有奖品！）但我完全困惑了。 MSDN 上的文档建议，如果我想向组中添加一个 ConfurationSection，我需要创建 ConfurationSection 的子类。我自己写了一个小 Windows 应用程序来帮助我解决这个问题，但我并没有走得太远！这是相关的代码 - 它尝试仅添加“安全”部分。

private void AddElmahSectionGroup()
{
    string exePath = Path.Combine(Environment.CurrentDirectory, "NameOfExe.exe");
    Configuration configuration = ConfigurationManager.OpenExeConfiguration(exePath);

    ConfigurationSectionGroup elmahGroup = configuration.GetSectionGroup(elmahSectionGroupName);
    if (elmahGroup != null)
    {
        Console.WriteLine("sectionGroup with name {0} already in web.config", elmahSectionGroupName);
        return;
    }
    elmahGroup = new ConfigurationSectionGroup();
    configuration.SectionGroups.Add(elmahSectionGroupName, elmahGroup);

    var securitySection = new Section { Name = "security", RequirePermission = false, Type = "Elmah.SecuritySectionHandler, Elmah" };
    elmahGroup.Sections.Add("security", securitySection);

    configuration.Save();
}

public class Section : ConfigurationSection
{
    [ConfigurationProperty("name", IsRequired = true)]
    public string Name { get { return (String)this["name"]; } set { this["name"] = value; } }

    [ConfigurationProperty("requirePermission", IsRequired = true)]
    public bool RequirePermission { get { return (bool)this["requirePermission"]; } set { this["requirePermission"] = value; } }

    [ConfigurationProperty("type", IsRequired = true)]
    public string Type { get { return (string)this["type"]; } set { this["type"] = value; } }
}

这是最终的配置文件

    <?xml version="1.0" encoding="utf-8"?>
<configuration>
    <configSections>
        <sectionGroup name="elmah" type="System.Configuration.ConfigurationSectionGroup, System.Configuration, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" >
            <section name="security" type="ConfigEditing.Form1+ElmahLogic+Section, ConfigEditing, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" />
        </sectionGroup>
    </configSections>
    <elmah>
        <security name="security" requirePermission="false" type="Elmah.SecuritySectionHandler, Elmah" />
    </elmah>
</configuration>

，它完全扭曲了我的瓜： -

• 首先， section 元素的 type 是我的类的类型（从 ConfigurationSection 派生），
• 其次是将sectionGroup定义添加到组中，我（同时）将组添加到配置中。

我对这些发现并不感到惊讶，因为我真的不理解 API，但我只是没有找到任何关于我想做的事情的像样的文档。这里的任何人都可以提供帮助吗 - 即使它只是向我指出一个 MSDN 示例，该示例是一个实际的完整工作示例。

Answer 1

一个简单的示例，将向 app.config 添加如下所示的部分：

//<configSections>
//  <sectionGroup name="elmah" type="Overflow.CustomConfigurationSectionGroup, Overflow, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" >
//  </sectionGroup>
//</configSections>

namespace Overflow
{
    public class CustomSecuritySection : ConfigurationSection
    {
    }

    public class CustomConfigurationSectionGroup : ConfigurationSectionGroup
    {
        public CustomConfigurationSectionGroup()
        {
            Security = new CustomSecuritySection();
        }

        [ConfigurationProperty("security")] 
        public CustomSecuritySection Security { get; private set; }
    }

    class Program
    {
        static void Main(string[] args)
        {
            var config = ConfigurationManager.OpenExeConfiguration(Path.Combine(Application.StartupPath, Application.ProductName + ".exe"));

            config.SectionGroups.Add("elmah", new CustomConfigurationSectionGroup());

            config.Save(ConfigurationSaveMode.Modified);

        }
    }
}