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首发于几个开源项目配置信息的存储和处理的方式
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：
duwamish深入剖析-配置篇
由duwamish学习web.config的配置
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
