学步园

<configuration>
    <configSections>
        <section name="indexusNetSharedCache" type="MergeSystem.Indexus.WinServiceCommon.Configuration.Client.IndexusProviderSection, MergeSystem.Indexus.WinServiceCommon"
             />
    </configSections>
         
    <indexusNetSharedCache defaultProvider="IndexusSharedCacheProvider">
        <servers>
            <add key="SrvZh03"  ipaddress="192.168.212.21" port="48888" />
            <!--<add key="RoeePC"  ipaddress="10.0.0.15" port="48888" />
            <add key="MichaelPC"  ipaddress="10.0.0.53" port="48888" />-->
        </servers>
        <providers>
            <add
        name="IndexusSharedCacheProvider"
        type="MergeSystem.Indexus.WinServiceCommon.Provider.Cache.IndexusSharedCacheProvider, MergeSystem.Indexus.WinServiceCommon"
           >
            </add>
        </providers>
    </indexusNetSharedCache>

 配置节IndexusProviderSection ,其中成员Servers和Providers继承于System.Configuration.ConfigurationElementCollection， 而它聚合了System.Configuration.ConfigurationElement派生
ConfigurationElement的派生类包括了一序列的属性，这些属性可以定义默认值和限制取值范围

public class IndexusProviderSection : ConfigurationSection
    ...{      
        [ConfigurationProperty("providers")]
        public ProviderSettingsCollection Providers
        ...{
            get ...{ return (ProviderSettingsCollection)base["providers"]; }
        }

        
        [ConfigurationProperty("servers")]
        public IndexusServerSettingCollection Servers
        ...{
            get ...{ return (IndexusServerSettingCollection)this["servers"]; }
        }

        /**//// <summary>
        /// Gets or sets the default provider, min. 1 server has to be defined.
        /// </summary>
        /// <value>The default provider.</value>
        [StringValidator(MinLength = 1)]
        [ConfigurationProperty("defaultProvider", DefaultValue = "IndexusSharedCacheProvider")]
        public string DefaultProvider
        ...{
            get ...{ return (string)base["defaultProvider"]; }
            set ...{ base["defaultProvider"] = value; }
        }
    }

public class IndexusServerSettingCollection : System.Configuration.ConfigurationElementCollection
    ...{

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


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

        
        protected override object GetElementKey(System.Configuration.ConfigurationElement element)
        ...{
            return ((IndexusServerSetting)element).Key;
        }
    }

public class IndexusServerSetting : System.Configuration.ConfigurationElement
    ...{
    
        [System.Configuration.ConfigurationProperty("key", IsRequired = true)]
        public string Key
        ...{
            get
            ...{
                return this["key"] as string;
            }
        }

        
        protected override void InitializeDefault()
        ...{
            base.InitializeDefault();
        }
        
        [System.Configuration.ConfigurationProperty("ipaddress", IsRequired = true)]
        public string IpAddress
        ...{
            get
            ...{
                return this["ipaddress"] as string;
            }
        }
        
        [System.Configuration.ConfigurationProperty("port", IsRequired = false)]
        public string Port
        ...{
            get
            ...{
                return this["port"] as string;
            }
        }
    }

使用方法：

                foreach (COM.Configuration.Client.IndexusServerSetting server in IndexusDistributionCache.ProviderSection.Servers)
                ...{
                    serverList.Add(server.IpAddress);
                }

providerCollection = new IndexusProviderCollection();
                        ProvidersHelper.InstantiateProviders(
                                                                providerSection.Providers,
                                providerCollection,
                                typeof(IndexusProviderBase)
                            );

                        providerBase = providerCollection[providerSection.DefaultProvider];

Provider介绍

.net 1.1的做法
http://blog.csdn.net/anghlq/archive/2006/09/17/1233175.aspx