通过例子看CS的配置文件,把内部类作为HashTable成员

先建立一个明为：Login.Config的配置文件

?xml version="1.0" encoding="utf-8" ?> 
<login>
    <oems>
        <add key="{056CAAC6-AA9A-4748-883E-7125086CAD06}" name = "ttt" 
            min="7000010001" max ="7000019999"
            domain="gtalkie.com"
            connectionString="DSN=SerMySQL;Uid=engqi;Pwd=123456;"
            />
            <add key="{CEEB5601-FF2C-4A0D-BA2B-7812D77DFE73}" name = "aaa" 
            min="6000300000" max ="6000399999"
            domain="cc.com"
            connectionString="DSN=qinghua;Uid=xbj;Pwd=123456;"
            />
    </oems>
</login>

读取配置文件的类

public class LoginConfig
    {
        public static readonly string CacheKey = "LoginConfiguration";
        Hashtable oems = new Hashtable();
        private int cacheFactor = 5;
        private XmlDocument XmlDoc = null;
        public LoginConfig(XmlDocument doc)
        {
            XmlDoc = doc;
            LoadValuesFromConfigurationXml();
        }

        public XmlNode GetConfigSection(string nodePath)
        {
            return XmlDoc.SelectSingleNode(nodePath);
        }

        public Hashtable Oems
        {
            get
            {
                return oems;
            }
        }
        public static LoginConfig GetConfig() 
        {
            LoginConfig config = CSCache.Get(CacheKey) as LoginConfig;
            if(config == null)
            {
                string path = null;
                HttpContext context = HttpContext.Current;
                if(context != null)
                    path = context.Server.MapPath("~/login.config");
                else
                    path = Path.Combine(AppDomain.CurrentDomain.BaseDirectory,  "login.config");

                XmlDocument doc = new XmlDocument();
                doc.Load(path);
                config = new LoginConfig(doc);
                CSCache.Max(CacheKey,config,new CacheDependency(path));

                CSCache.ReSetFactor(config.CacheFactor);
            }
            return config;
            
        }

        internal void LoadValuesFromConfigurationXml() 
        {
           
            //todocachefactor
            XmlNode node = GetConfigSection("login");
            
            foreach (XmlNode child in node.ChildNodes) 
            {

                if (child.Name == "oems")
                    GetOems(child, oems);

                

            }

        

        }

        internal void GetOems(XmlNode node, Hashtable table) 
        {

            foreach (XmlNode oem in node.ChildNodes) 
            {

                switch (oem.Name) 
                {
                    case "add" :
                        table.Add(oem.Attributes["key"].Value, new Oem(oem.Attributes) );
                        break;

                    case "remove" :
                        table.Remove(oem.Attributes["key"].Value);
                        break;

                    case "clear" :
                        table.Clear();
                        break;

                }

            }

        }
        public int CacheFactor
        {
             get  {  return cacheFactor;  } 
        }

        public class Oem 
        {
            
            string key;

            NameValueCollection providerAttributes = new NameValueCollection();

            public Oem (XmlAttributeCollection attributes) 
            {

                
                
                key = attributes["key"].Value;

                // Store all the attributes in the attributes bucket
                //
                foreach (XmlAttribute attribute in attributes) 
                {
                    if ( (attribute.Name != "key") )
                        providerAttributes.Add(attribute.Name, attribute.Value);
                }
            }
        
            public string Key 
            {
                get 
                {
                    return key;
                }
            }

            
        

            public NameValueCollection Attributes 
            {
                get 
                {
                    return providerAttributes;
                }
            }
            
        }

    }

login.config文件映射Oem内部类 。节点的属性映射到Attributes
重要的地方：把内部类放到了Hashtable。
Loginconfig 的Oem属性为Hashtable类型，其中的值则是Oem类的实例，这样就可以通过Oem属性访问Oem内部类了。
缺点是HashTable不能被序列化，用到序列化时可以自己写类型或者用IList