Enterprise Library 2.0 Hands On Lab 翻译(6):日志应用程序块(三)
2008-04-23 22:56
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练习3:创建并使用自定义LogFormatter
在本练习中将创建一个自定义的LogFormatter,并在应用程序中使用它。
第一步
打开EnoughPI.sln项目,默认的安装路径应该为C:/Program Files/Microsoft Enterprise Library January 2006/labs/cs/Logging/exercises/ex03/begin,并编译。
第二步 创建自定义LogFormatter
1.在解决方案管理器中选择Formatters/XmlFormatter.cs文件,选择View | Code菜单命令,添加如下命名空间。.添加如下代码到XmlFormatter类中。
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030171/f0cd6c7f9e7ae96feae062cb48f670f0.gif)
using Microsoft.Practices.EnterpriseLibrary.Common.Configuration;
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using Microsoft.Practices.EnterpriseLibrary.Logging;
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using Microsoft.Practices.EnterpriseLibrary.Logging.Configuration;
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using Microsoft.Practices.EnterpriseLibrary.Logging.Formatters;
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[ConfigurationElementType(typeof(CustomFormatterData))]
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public class XmlFormatter : LogFormatter
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{
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private NameValueCollection Attributes = null;
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public XmlFormatter(NameValueCollection attributes)
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{
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this.Attributes = attributes;
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}
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public override string Format(LogEntry log)
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{
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string prefix = this.Attributes["prefix"];
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string ns = this.Attributes["namespace"];
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using (StringWriter s = new StringWriter())
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{
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XmlTextWriter w = new XmlTextWriter(s);
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w.Formatting = Formatting.Indented;
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w.Indentation = 2;
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w.WriteStartDocument(true);
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w.WriteStartElement(prefix, "logEntry", ns);
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w.WriteAttributeString("Priority", ns,
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log.Priority.ToString(CultureInfo.InvariantCulture));
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w.WriteElementString("Timestamp", ns, log.TimeStampString);
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w.WriteElementString("Message", ns, log.Message);
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w.WriteElementString("EventId", ns,
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log.EventId.ToString(CultureInfo.InvariantCulture));
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w.WriteElementString("Severity", ns, log.Severity.ToString());
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w.WriteElementString("Title", ns, log.Title);
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w.WriteElementString("Machine", ns, log.MachineName);
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w.WriteElementString("AppDomain", ns, log.AppDomainName);
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w.WriteElementString("ProcessId", ns, log.ProcessId);
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w.WriteElementString("ProcessName", ns, log.ProcessName);
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w.WriteElementString("Win32ThreadId", ns, log.Win32ThreadId);
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w.WriteElementString("ThreadName", ns, log.ManagedThreadName);
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w.WriteEndElement();
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w.WriteEndDocument();
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return s.ToString();
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}
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}
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}
[align=left]日志项将被格式化为XML格式,并且它期望接收两个参数prefix和namespace。[/align]
3.选择Build | Build Solution编译整个解决方案。
第三步 使用自定义LogFormatter
1.在解决方案管理器中选择项目EnoughPI的配置文件App.config文件,选择View | Open With…菜单命令,选择Enterprise Library Configuration并单击OK按钮。
2.选中Logging Application Block | Formatters节点,选择Action | New | Custom Formatter菜单命令,并设置属性Name的为Xml Formatter。
![](http://www.cnblogs.com/images/cnblogs_com/terrylee/EL_036.gif)
3.选择Type属性,单击ellipses显示Type Selector对话框。
![](http://www.cnblogs.com/images/cnblogs_com/terrylee/EL_037.gif)
4.从程序集EnoughPI.Logging中选择XmlFormatter类并单击OK按钮。
![](http://www.cnblogs.com/images/cnblogs_com/terrylee/EL_038.gif)
在Type Selector列表中的类,来自于与Enterprise Library Configuration配置工具在同一目录下的程序集,它们继承于基类LogFormatter,并且有一个值为CustomTraceListenerData的特性ConfigurationElementType。
5.选择Attributes属性并单击ellipses显示EditableKeyValue Collection Editor。
![](http://www.cnblogs.com/images/cnblogs_com/terrylee/EL_039.gif)
6.添加如下键值对
Key = prefix, Value = x
Key = namespace, Value = EnoughPI/2.0
并单击OK按钮。
![](http://www.cnblogs.com/images/cnblogs_com/terrylee/EL_040.gif)
还记得在类XmlFormatter中期望接受的两个参数prefix和namespace。
7.选择Logging Application Block | Trace Listeners | Custom TraceListener节点,并设置属性Formatter为Xml Formatter。
![](http://www.cnblogs.com/images/cnblogs_com/terrylee/EL_041.gif)
8.选择File | Save All保存配置,并关闭Enterprise Library Configuration工具。
9.选择Debug | Start Without Debugging菜单命令并运行应用程序,EnoughPI程序用来计算∏的精度。在NumericUpDown控件中输入你希望的精度并点击Calculate按钮。可以看到日志项显示在一个控制台窗口中。
![](http://www.cnblogs.com/images/cnblogs_com/terrylee/EL_042.gif)
完成后的解决方案代码如C:/Program Files/Microsoft Enterprise Library January 2006/labs/cs/Logging/exercises/ex03/end所示。
注意根据Hands On Lab给出的时间建议,做完以上三个练习的时间应该为30分钟。
更多Enterprise Library的文章请参考《Enterprise Library系列文章》
在本练习中将创建一个自定义的LogFormatter,并在应用程序中使用它。
第一步
打开EnoughPI.sln项目,默认的安装路径应该为C:/Program Files/Microsoft Enterprise Library January 2006/labs/cs/Logging/exercises/ex03/begin,并编译。
第二步 创建自定义LogFormatter
1.在解决方案管理器中选择Formatters/XmlFormatter.cs文件,选择View | Code菜单命令,添加如下命名空间。.添加如下代码到XmlFormatter类中。
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030171/f0cd6c7f9e7ae96feae062cb48f670f0.gif)
using Microsoft.Practices.EnterpriseLibrary.Common.Configuration;
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using Microsoft.Practices.EnterpriseLibrary.Logging;
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using Microsoft.Practices.EnterpriseLibrary.Logging.Configuration;
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using Microsoft.Practices.EnterpriseLibrary.Logging.Formatters;
[align=left]2[/align]
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[ConfigurationElementType(typeof(CustomFormatterData))]
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public class XmlFormatter : LogFormatter
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{
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private NameValueCollection Attributes = null;
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public XmlFormatter(NameValueCollection attributes)
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{
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![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
this.Attributes = attributes;
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}
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public override string Format(LogEntry log)
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{
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string prefix = this.Attributes["prefix"];
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string ns = this.Attributes["namespace"];
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using (StringWriter s = new StringWriter())
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{
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![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
XmlTextWriter w = new XmlTextWriter(s);
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w.Formatting = Formatting.Indented;
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![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
w.Indentation = 2;
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w.WriteStartDocument(true);
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w.WriteStartElement(prefix, "logEntry", ns);
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w.WriteAttributeString("Priority", ns,
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log.Priority.ToString(CultureInfo.InvariantCulture));
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
w.WriteElementString("Timestamp", ns, log.TimeStampString);
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![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
w.WriteElementString("Message", ns, log.Message);
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
w.WriteElementString("EventId", ns,
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log.EventId.ToString(CultureInfo.InvariantCulture));
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![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
w.WriteElementString("Severity", ns, log.Severity.ToString());
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w.WriteElementString("Title", ns, log.Title);
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
w.WriteElementString("Machine", ns, log.MachineName);
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
w.WriteElementString("AppDomain", ns, log.AppDomainName);
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
w.WriteElementString("ProcessId", ns, log.ProcessId);
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
w.WriteElementString("ProcessName", ns, log.ProcessName);
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
w.WriteElementString("Win32ThreadId", ns, log.Win32ThreadId);
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
w.WriteElementString("ThreadName", ns, log.ManagedThreadName);
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
w.WriteEndElement();
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
w.WriteEndDocument();
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
return s.ToString();
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030175/eec4c0236afc26744c9c4e910bc34958.gif)
}
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030175/eec4c0236afc26744c9c4e910bc34958.gif)
}
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030194/587e34b10dcf5efbc0859b53470a2db3.gif)
![](https://oscdn.geek-share.com/Uploads/Images/Content/2015/2015030189/4fd96b3cf02f4c7b5c8964ac8167f7af.gif)
}
[align=left]日志项将被格式化为XML格式,并且它期望接收两个参数prefix和namespace。[/align]
3.选择Build | Build Solution编译整个解决方案。
第三步 使用自定义LogFormatter
1.在解决方案管理器中选择项目EnoughPI的配置文件App.config文件,选择View | Open With…菜单命令,选择Enterprise Library Configuration并单击OK按钮。
2.选中Logging Application Block | Formatters节点,选择Action | New | Custom Formatter菜单命令,并设置属性Name的为Xml Formatter。
![](http://www.cnblogs.com/images/cnblogs_com/terrylee/EL_036.gif)
3.选择Type属性,单击ellipses显示Type Selector对话框。
![](http://www.cnblogs.com/images/cnblogs_com/terrylee/EL_037.gif)
4.从程序集EnoughPI.Logging中选择XmlFormatter类并单击OK按钮。
![](http://www.cnblogs.com/images/cnblogs_com/terrylee/EL_038.gif)
在Type Selector列表中的类,来自于与Enterprise Library Configuration配置工具在同一目录下的程序集,它们继承于基类LogFormatter,并且有一个值为CustomTraceListenerData的特性ConfigurationElementType。
5.选择Attributes属性并单击ellipses显示EditableKeyValue Collection Editor。
![](http://www.cnblogs.com/images/cnblogs_com/terrylee/EL_039.gif)
6.添加如下键值对
Key = prefix, Value = x
Key = namespace, Value = EnoughPI/2.0
并单击OK按钮。
![](http://www.cnblogs.com/images/cnblogs_com/terrylee/EL_040.gif)
还记得在类XmlFormatter中期望接受的两个参数prefix和namespace。
7.选择Logging Application Block | Trace Listeners | Custom TraceListener节点,并设置属性Formatter为Xml Formatter。
![](http://www.cnblogs.com/images/cnblogs_com/terrylee/EL_041.gif)
8.选择File | Save All保存配置,并关闭Enterprise Library Configuration工具。
9.选择Debug | Start Without Debugging菜单命令并运行应用程序,EnoughPI程序用来计算∏的精度。在NumericUpDown控件中输入你希望的精度并点击Calculate按钮。可以看到日志项显示在一个控制台窗口中。
![](http://www.cnblogs.com/images/cnblogs_com/terrylee/EL_042.gif)
完成后的解决方案代码如C:/Program Files/Microsoft Enterprise Library January 2006/labs/cs/Logging/exercises/ex03/end所示。
注意根据Hands On Lab给出的时间建议,做完以上三个练习的时间应该为30分钟。
更多Enterprise Library的文章请参考《Enterprise Library系列文章》
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