How to create custom config section in app.config? [duplicate]

问题

This question already has an answer here:

Custom app.config Config Section Handler 3 answers

I want to add a custom configuration section in my app.config file. Is there a way to do it and how can I access these settings in my program. Following is the config section I want to add to my app.config:

<RegisterCompanies>
    <Companies>
      <Company name=\"Tata Motors\" code=\"Tata\"/>
      <Company name=\"Honda Motors\" code=\"Honda\"/>
    </Companies>
</RegisterCompanies>

回答1:

Import namespace :

using System.Configuration;

Create ConfigurationElement Company :

public class Company : ConfigurationElement
{

        [ConfigurationProperty("name", IsRequired = true)]
        public string Name
        {
            get
            {
                return this["name"] as string;
            }
        }
            [ConfigurationProperty("code", IsRequired = true)]
        public string Code
        {
            get
            {
                return this["code"] as string;
            }
        }
}

ConfigurationElementCollection:

public class Companies
        : ConfigurationElementCollection
    {
        public Company this[int index]
        {
            get
            {
                return base.BaseGet(index) as Company ;
            }
            set
            {
                if (base.BaseGet(index) != null)
                {
                    base.BaseRemoveAt(index);
                }
                this.BaseAdd(index, value);
            }
        }

       public new Company this[string responseString]
       {
            get { return (Company) BaseGet(responseString); }
            set
            {
                if(BaseGet(responseString) != null)
                {
                    BaseRemoveAt(BaseIndexOf(BaseGet(responseString)));
                }
                BaseAdd(value);
            }
        }

        protected override System.Configuration.ConfigurationElement CreateNewElement()
        {
            return new Company();
        }

        protected override object GetElementKey(System.Configuration.ConfigurationElement element)
        {
            return ((Company)element).Name;
        }
    }

and ConfigurationSection:

public class RegisterCompaniesConfig
        : ConfigurationSection
    {

        public static RegisterCompaniesConfig GetConfig()
        {
            return (RegisterCompaniesConfig)System.Configuration.ConfigurationManager.GetSection("RegisterCompanies") ?? new RegisterCompaniesConfig();
        }

        [System.Configuration.ConfigurationProperty("Companies")]
            [ConfigurationCollection(typeof(Companies), AddItemName = "Company")]
        public Companies Companies
        {
            get
            {
                object o = this["Companies"];
                return o as Companies ;
            }
        }

    }

and you must also register your new configuration section in web.config (app.config):

<configuration>       
    <configSections>
          <section name="Companies" type="blablabla.RegisterCompaniesConfig" ..>

then you load your config with

var config = RegisterCompaniesConfig.GetConfig();
foreach(var item in config.Companies)
{
   do something ..
}

回答2:

You should check out Jon Rista's three-part series on .NET 2.0 configuration up on CodeProject.

Unraveling the mysteries of .NET 2.0 configuration
Decoding the mysteries of .NET 2.0 configuration
Cracking the mysteries of .NET 2.0 configuration

Highly recommended, well written and extremely helpful!

It shows you very clearly how to write the necessary classes (deriving from ConfigurationElement and/or ConfigurationSection) in order to design the custom config sections you need.

来源：https://stackoverflow.com/questions/1316058/how-to-create-custom-config-section-in-app-config

标签

app-config