ASP.net(1.1)原理学习笔记--第三章 配置Configuration

<configuration>//顶层元素
<system.web>//大多应用程序设置位于此元素下
<sessionState mode='Inproc' timeout='10' />//设置会话状态超时时间
</system.web>
</configuration>

1, 配置的四个层次

(1)机器:machine.config:位于$FRAMEWORK\CONFIG($FRAMEWORK一般是c:\winnt\Microsoft.NET\Framework\v1.0.3705)，
是.net必须备的默认配置文件。
web.config用来修改.net默认配置。
(2)站点:web站点根目录下的web.config，影响全站配置
(3)程序:应用程序虚目录根下的web.config，影响全虚目录配置
(3)子目录:虚目录的子目录下的web.config，影响该子目录及其子目录下配置

2，通过location元素简化web.config配置:

<configuration>
<location path="bar">//作用就相当于在bar目录下配置了指定的web.config配置
<system.web>
<httpHandlers>
<remove verb="*" path="*.ashx" />
</httpHandlers>
</system.web>
</location>
</configuration>

<!— File: web.config —>
<configuration>
<appSettings>
<add key="DSN"
value="server=localhost;uid=sa;pwd=;database=pubs"
/>
<add key="bgColor" value="white" />
</appSettings>
</configuration>

<!— File: samplepage.aspx —>
<%@ Page Language='C#' %>
<%@ Import Namespace='System.Configuration' %>

<script runat=server>
protected void Page_Load(object src, EventArgs e)
{
string dsn = ConfigurationSettings.AppSettings["DSN"];
// use dsn to connect to a database...

string bgColor =
ConfigurationSettings.AppSettings["bgColor"];
// use retrieved background color...
}
</script>

<!— remainder of page not shown —>

10

60

25

25

""

<processModel enable="true"
timeout="Infinite"
idleTimeout="Infinite"
shutdownTimeout="0:00:05"
requestLimit="Infinite"
requestQueueLimit="5000"
restartQueueLimit="10"
memoryLimit="60"
webGarden="true"//启用该配置后，每个cpu运行一个工作者进程，进程间不能共享会话状态，数据缓存，程序状态
cpuMask="0x00000007"//相当于二进制0...0111屏蔽，则只使用cpu0,cpu1,cpu2，屏蔽其他cpu
userName="machine"
password="AutoGenerate"
logLevel="Errors"
clientConnectedCheck="0:00:05"
comAuthenticationLevel="Connect"
comImpersonationLevel="Impersonate"
responseRestartDeadlockInterval="00:09:00"
responseDeadlockInterval="00:03:00"
maxWorkerThreads="25"
maxIoThreads="25" />

public class ProcessModelInfo
{
public static ProcessInfo GetCurrentProcessInfo();
public static ProcessInfo[] GetHistory(int num);
}

public class ProcessInfo
{
public TimeSpan Age {get;}//年龄
public int PeakMemoryUsed {get;}//已使用最大内存数
public int ProcessID {get;}//进程ID
public int RequestCount {get;}//已服务的请求数
public ProcessShutdownReason ShutdownReason {get;}//关闭原因
public DateTime StartTime {get;}//开始时间
public ProcessStatus Status {get;}//状态
}

<configuration>
<!— ... —>
<system.web>
<compilation>
<assemblies>
<add assembly="Util, Version=1.0.0.0, Culture=neutral, PublicKeyToken=a77a5c561934e089" />
</assemblies>
</compilation>
</system.web>
</configuration>

<configuration>
<!— ... —>
<system.web>
<pages enableViewState='false' />
</system.web>
</configuration>

object settings =
ConfigurationSettings.GetConfig("appSettings");
NameValueCollection nvc = settings as NameValueCollection;
if (nvc != null)
{
string val = (string)nvc["xxx"];
}

public interface IConfigurationSectionHandler
{
object Create(object parent, object input, XmlNode node);
}

<!— File: web.config —>
<configuration>
<acmeGroup>
<acme>//指定自定义元素
<font>Courier New</font>
<backgroundColor>Green</backgroundColor>
<underlineLinks>true</underlineLinks>
<horizontalWidth>600</horizontalWidth>
<verticalWidth>800</verticalWidth>
</acme>
</acmeGroup>
</configuration>

// File: AcmeSettings.cs
namespace EssentialAspDotNet.Config
{
public class AcmeSettings
{
public string Font;
public string BackgroundColor;
public bool   UnderlineLinks;
public int    HorizontalWidth;
public int    VerticalWidth;
}
}

// File: AcmeConfigHandler.cs
namespace EssentialAspDotNet.Config
{
public class AcmeConfigHandler :
IConfigurationSectionHandler
{
public object Create(object parent, object input,
XmlNode node)
{
AcmeSettings aset = new AcmeSettings();

foreach (XmlNode n in node.ChildNodes)
{
switch (n.Name)
{
case ("font"):
aset.Font = n.InnerText;
break;
case ("backgroundColor"):
aset.BackgroundColor = n.InnerText;
break;
case ("underlineLinks"):
aset.UnderlineLinks = bool.Parse(n.InnerText);
break;
case ("horizontalWidth"):
aset.HorizontalWidth = int.Parse(n.InnerText);
break;
case ("verticalWidth"):
aset.VerticalWidth = int.Parse(n.InnerText);
break;
}
}
return aset;
}
}
}

<!— File: web.config —>
<configuration>
<configSections>
<sectionGroup name="acmeGroup">
<section name="acme"
type="EssentialAspDotNet.Config.AcmeConfigHandler, AcmeConfigHandler"
/>
</sectionGroup>
</configSections>
<!— ... —>
</configuration>

// File: TestAcmeSettings.aspx
protected void Page_Load(object src, EventArgs e)
{
AcmeSettings set;
set = ConfigurationSettings.GetConfig("acmeGroup/acme")
as AcmeSettings;

// use set here (like set.Font, set.BackgroundColor,
// etc.)
}

<!— File: web.config —>
<configuration>
<configSections>
<section name="myGroup"
type="System.Configuration.NameValueFileSectionHandler, System, Version=1.0.3300.0, Culture=neutral,
PublicKeyToken=b77a5c561934e089"/>//添加了名为myGroup的新的配置的部份
///其type属性引用了NameValueFileSectionHandler类，该类的实例将其键/值对保存在NameValueCollection中供访问。

</configSections>

<myGroup>
<add key="font" value="Courier New"/>
<add key="backgroundColor" value="Green"/>
<add key="underlineLinks" value="true"/>
<add key="horizontalWidth" value="600"/>
<add key="verticalWidth" value="800"/>
</myGroup>
<!— ... —>
</configuration>

// File: TestAcmeSettings.aspx
protected void Page_Load(object src, EventArgs e)
{
NameValueCollection set;
set = ConfigurationSettings.GetConfig("myGroup")
as NameValueCollection;

// use set here (like set["Font"],
// set["BackgroundColor"], etc.)
}