我尝试使用log4net创建XML日志文件，它成功创建了日志，但是没有根元素
我的问题如何创建根元素
<appender name="RollingFile" type="log4net.Appender.RollingFileAppender">
<file value="logger.xml" type="log4net.Util.PatternString" />
<appendToFile value="true"/>
<rollingStyle value="Size"/>
<maxSizeRollBackups value="20"/>
<maximumFileSize value="10000KB"/>
<staticLogFileName value="true"/>
<preserveLogFileNameExtension value="true" />
<layout type="Log4net1.CustomXmlLayoutSchemaLog4j">
<locationInfo value="true" />
</layout>
</appender>
<event logger="SomeName2" time="4/16/2019 2:45:15 PM" level="ERROR" thread="1"><message>Exception Caught: </message><properties><data name="log4jmachinename" value="IbrahimS-LPT" /><data name="log4japp" value="Log4net.exe" /><data name="log4net:Identity" value="" /><data name="log4net:UserName" value="SSS-PROCESS\ibrahims" /><data name="log4net:HostName" value="IbrahimS-LPT" /></properties><throwable>System.InvalidCastException: hhhhh ---> System.Exception: sub
--- End of inner exception stack trace ---</throwable><locationInfo class="Log4net.LoggingHelper" method="LogError" file="" line="0" /></event>
<event logger="SomeName2" time="4/16/2019 2:45:15 PM" level="ERROR" thread="1"><message>Exception Caught: </message><properties><data name="log4jmachinename" value="IbrahimS-LPT" /><data name="log4japp" value="Log4net.exe" /><data name="log4net:Identity" value="" /><data name="log4net:UserName" value="SSS-PROCESS\ibrahims" /><data name="log4net:HostName" value="IbrahimS-LPT" /></properties><throwable>System.InvalidCastException: hhhhh ---> System.Exception: sub
--- End of inner exception stack trace ---</throwable><locationInfo class="Log4net.LoggingHelper" method="LogError" file="" line="0" /></event>
当尝试以xml格式打开文件时，出现此错误，无法解析任何XML输入
但是当手动添加根元素时，我可以查看
我需要像这样
<app>
<event logger="SomeName2" time="4/16/2019 2:45:15 PM" level="ERROR" thread="1"></event>
<event logger="SomeName2" time="4/16/2019 2:45:15 PM" level="ERROR" thread="1"></event>
</app>
class CustomXmlLayoutSchemaLog4j : XmlLayoutBase
{
#region Static Members
/// <summary>
/// The 1st of January 1970 in UTC
/// </summary>
private static readonly DateTime s_date1970 = new DateTime(1970, 1, 1);
#endregion
#region Constructors
/// <summary>
/// Constructs an XMLLayoutSchemaLog4j
/// </summary>
public CustomXmlLayoutSchemaLog4j() : base()
{
}
/// <summary>
/// Constructs an XMLLayoutSchemaLog4j.
/// </summary>
/// <remarks>
/// <para>
/// The <b>LocationInfo</b> option takes a boolean value. By
/// default, it is set to false which means there will be no location
/// information output by this layout. If the the option is set to
/// true, then the file name and line number of the statement
/// at the origin of the log statement will be output.
/// </para>
/// <para>
/// If you are embedding this layout within an SMTPAppender
/// then make sure to set the <b>LocationInfo</b> option of that
/// appender as well.
/// </para>
/// </remarks>
public CustomXmlLayoutSchemaLog4j(bool locationInfo) : base(locationInfo)
{
}
#endregion
#region Public Properties
/// <summary>
/// The version of the log4j schema to use.
/// </summary>
/// <remarks>
/// <para>
/// Only version 1.2 of the log4j schema is supported.
/// </para>
/// </remarks>
public string Version
{
get { return "1.2"; }
set
{
if (value != "1.2")
{
throw new ArgumentException("Only version 1.2 of the log4j schema is currently supported");
}
}
}
#endregion
/* Example log4j schema event
<event logger="first logger" level="ERROR" thread="Thread-3" timestamp="1051494121460">
<message><![CDATA[errormsg 3]]></message>
<NDC><![CDATA[third]]></NDC>
<MDC>
<data name="some string" value="some valuethird"/>
</MDC>
<throwable><![CDATA[java.lang.Exception: someexception-third
at org.apache.log4j.chainsaw.Generator.run(Generator.java:94)
]]></throwable>
<locationInfo class="org.apache.log4j.chainsaw.Generator"
method="run" file="Generator.java" line="94"/>
<properties>
<data name="log4jmachinename" value="windows"/>
<data name="log4japp" value="udp-generator"/>
</properties>
</event>
*/
/* Since log4j 1.3 the MDC has been combined into the properties element */
/// <summary>
/// Actually do the writing of the xml
/// </summary>
/// <param name="writer">the writer to use</param>
/// <param name="loggingEvent">the event to write</param>
/// <remarks>
/// <para>
/// Generate XML that is compatible with the log4j schema.
/// </para>
/// </remarks>
override protected void FormatXml(XmlWriter writer, LoggingEvent loggingEvent)
{
// Translate logging events for log4j
Header = "App";
// Translate hostname property
if (loggingEvent.LookupProperty(LoggingEvent.HostNameProperty) != null &&
loggingEvent.LookupProperty("log4jmachinename") == null)
{
loggingEvent.GetProperties()["log4jmachinename"] = loggingEvent.LookupProperty(LoggingEvent.HostNameProperty);
}
// translate appdomain name
if (loggingEvent.LookupProperty("log4japp") == null &&
loggingEvent.Domain != null &&
loggingEvent.Domain.Length > 0)
{
loggingEvent.GetProperties()["log4japp"] = loggingEvent.Domain;
}
// translate identity name
if (loggingEvent.Identity != null &&
loggingEvent.Identity.Length > 0 &&
loggingEvent.LookupProperty(LoggingEvent.IdentityProperty) == null)
{
loggingEvent.GetProperties()[LoggingEvent.IdentityProperty] = loggingEvent.Identity;
}
// translate user name
if (loggingEvent.UserName != null &&
loggingEvent.UserName.Length > 0 &&
loggingEvent.LookupProperty(LoggingEvent.UserNameProperty) == null)
{
loggingEvent.GetProperties()[LoggingEvent.UserNameProperty] = loggingEvent.UserName;
}
// Write the start element
writer.WriteStartElement("event");
writer.WriteAttributeString("logger", loggingEvent.LoggerName);
// Calculate the timestamp as the number of milliseconds since january 1970
//
// We must convert the TimeStamp to UTC before performing any mathematical
// operations. This allows use to take into account discontinuities
// caused by daylight savings time transitions.
TimeSpan timeSince1970 = loggingEvent.TimeStampUtc - s_date1970;
writer.WriteAttributeString("time", DateTime.Now.ToString());
writer.WriteAttributeString("level", loggingEvent.Level.DisplayName);
writer.WriteAttributeString("thread", loggingEvent.ThreadName);
// Append the message text
writer.WriteStartElement("message");
Transform.WriteEscapedXmlString(writer, loggingEvent.RenderedMessage, this.InvalidCharReplacement);
writer.WriteEndElement();
object ndcObj = loggingEvent.LookupProperty("NDC");
if (ndcObj != null)
{
string valueStr = loggingEvent.Repository.RendererMap.FindAndRender(ndcObj);
if (valueStr != null && valueStr.Length > 0)
{
// Append the NDC text
writer.WriteStartElement("NDC");
Transform.WriteEscapedXmlString(writer, valueStr, this.InvalidCharReplacement);
writer.WriteEndElement();
}
}
// Append the properties text
PropertiesDictionary properties = loggingEvent.GetProperties();
if (properties.Count > 0)
{
writer.WriteStartElement("properties");
foreach (System.Collections.DictionaryEntry entry in properties)
{
writer.WriteStartElement("data");
writer.WriteAttributeString("name", (string)entry.Key);
// Use an ObjectRenderer to convert the object to a string
string valueStr = loggingEvent.Repository.RendererMap.FindAndRender(entry.Value);
writer.WriteAttributeString("value", valueStr);
writer.WriteEndElement();
}
writer.WriteEndElement();
}
string exceptionStr = loggingEvent.GetExceptionString();
if (exceptionStr != null && exceptionStr.Length > 0)
{
// Append the stack trace line
writer.WriteStartElement("throwable");
Transform.WriteEscapedXmlString(writer, exceptionStr, this.InvalidCharReplacement);
writer.WriteEndElement();
}
if (LocationInfo)
{
LocationInfo locationInfo = loggingEvent.LocationInformation;
writer.WriteStartElement("locationInfo");
writer.WriteAttributeString("class", locationInfo.ClassName);
writer.WriteAttributeString("method", locationInfo.MethodName);
writer.WriteAttributeString("file", locationInfo.FileName);
writer.WriteAttributeString("line", locationInfo.LineNumber);
writer.WriteEndElement();
}
writer.WriteEndElement();
}
}
答案 0 :(得分：0)
您需要做的是下一个：
在这部分代码之前：
// Write the start element
writer.WriteStartElement("event");
writer.WriteAttributeString("logger", loggingEvent.LoggerName);
您需要添加以下行：
writer.WriteStartElement("App");
另外，在当前代码中的最后一个后面添加一个writer.WriteEndElement();。
因此您的代码将如下所示：
// Write the start element
writer.WriteStartElement("App");
writer.WriteStartElement("event");
writer.WriteAttributeString("logger", loggingEvent.LoggerName);
.
.
.
.
writer.WriteEndElement();
writer.WriteEndElement();