最近在看duwamish7,asp.net forums, dottext几个优秀的开源(微软官方)的项目
因我目前所处的技术水平的阶段的原因,我看这些项目程序,更加关注的是具体的实现
次之才是架构
比较第一篇:几个开源项目实体层实现方式比较
这次的关注点是它们存储和处理配置信息的不同方式
一,duwamish7和asp.net forums
这两者处理方式有相同之处,都是通过实现IConfigurationSectionHandler来实现配置类
配置类的代码如下:
public class DuwamishConfiguration : IConfigurationSectionHandler { private static string dbConnectionString ; private static bool enablePageCache ; IConfigurationSectionHandler 成员#region IConfigurationSectionHandler 成员 public object Create(object parent, object configContext, System.Xml.XmlNode section) { NameValueCollection settings ; try { NameValueSectionHandler baseHandler = new NameValueSectionHandler() ; settings = (NameValueCollection)baseHandler.Create(parent,configContext,section) ; } catch { settings = null ; } if (settings != null) { dbConnectionString = (string)settings["dbConnectionString"] ; enablePageCache = Convert.ToBoolean(settings["enablePageCache"]) ; } return settings ; } #endregion public static string ConnectionString { get { return dbConnectionString ; } } public static bool EnablePageCache { get { return enablePageCache ; } } }web.config如下:
<?xml version="1.0" encoding="utf-8" ?><configuration> <configSections> <section name="DuwamishConfiguration" type="Duwamish7.Common.DuwamishConfiguration, Duwamish7.Common" /> </configSections> <DuwamishConfiguration> <add key="dbConnectionString" value="server=localhost;User ID=Duwamish7;Password=password;database=Duwamish7;Connection Reset=FALSE" /> <add key="enablePageCache" value="true" /> </DuwamishConfiguration> <system.web> <compilation debug="true" /> </system.web></configuration>然后就可以DuwamishConfiguration.ConnectionString获得数据库连接,DuwamishConfiguration.xxxx获得你定义的其他
数据了,不过这样用之前,需要先调用这个方法哦
System.Configuration.ConfigurationSettings.GetConfig("DuwamishConfiguration") ;
通常这个方法会放在Global.asa的application_start事件处理中,或者自己定义的
httpmodule的application_start类似事件中
关于duwamish7配置信息处理的更多信息,可以参考:
二,dottext配置信息的存储和处理
dottext配置信息不是放在web.config,而是放在一个自己定义的blog.config文件中:
<?xml version="1.0" encoding="utf-8" ?> <BlogConfigurationSettings xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <ConnectionString>Data Source=KWK;Database=blog;UID=sa;Pwd=sa;</ConnectionString> <EnablePageCache>true</EnablePageCache></BlogConfigurationSettings>然后通过串行化的方式获取数据,先定义对应的类:
[Serializable]public class BlogConfigurationSettings{ private string _connectionString ; public string ConnectionString { get { return _connectionString ; } set { _connectionString = value ; } } private bool _enablePageCache ; public bool EnablePageCache { get { return _enablePageCache ; } set { _enablePageCache = value ; } }}然后可以通过如下方法获得这些配置类对象:
public static BlogConfigurationSettings Instance(HttpContext context) { //在实际的应用中,别忘了加上缓存 string filepath = context.Server.MapPath("~/blog.config"); settings = (BlogConfigurationSettings)LoadSerializedObject(typeof(BookConfigurationSettings),filepath); return settings; } public static object LoadSerializedObject(Type type, string filename) { FileStream fs = null; try { // open the stream fs = new FileStream(filename, FileMode.Open,FileAccess.Read); XmlSerializer serializer = new XmlSerializer(type); return serializer.Deserialize(fs); } catch(Exception e) { throw e; } finally { if(fs != null) fs.Close(); } }至于孰优孰劣,那就看具体的应用了,这个是见人见智的问题了