使用Microsoft EnterpriseLibrary(微软企业库)日志组件把系统日志写入数据库和xml文件

<configuration>
    <configSections>
        <section name="loggingConfiguration" type="Microsoft.Practices.EnterpriseLibrary.Logging.Configuration.LoggingSettings, Microsoft.Practices.EnterpriseLibrary.Logging, Version=5.0.414.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" requirePermission="true" />
        <section name="dataConfiguration" type="Microsoft.Practices.EnterpriseLibrary.Data.Configuration.DatabaseSettings, Microsoft.Practices.EnterpriseLibrary.Data, Version=5.0.414.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" requirePermission="true" />
    </configSections>
    <loggingConfiguration name="" tracingEnabled="true" defaultCategory="General">
        <listeners>
            <add name="Event Log Listener" type="Microsoft.Practices.EnterpriseLibrary.Logging.TraceListeners.FormattedEventLogTraceListener, Microsoft.Practices.EnterpriseLibrary.Logging, Version=5.0.414.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"
                listenerDataType="Microsoft.Practices.EnterpriseLibrary.Logging.Configuration.FormattedEventLogTraceListenerData, Microsoft.Practices.EnterpriseLibrary.Logging, Version=5.0.414.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"
                source="Enterprise Library Logging" formatter="Text Formatter"
                log="" machineName="." traceOutputOptions="None" />
            <add name="Database Trace Listener" type="Microsoft.Practices.EnterpriseLibrary.Logging.Database.FormattedDatabaseTraceListener, Microsoft.Practices.EnterpriseLibrary.Logging.Database, Version=5.0.414.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"
                listenerDataType="Microsoft.Practices.EnterpriseLibrary.Logging.Database.Configuration.FormattedDatabaseTraceListenerData, Microsoft.Practices.EnterpriseLibrary.Logging.Database, Version=5.0.414.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"
                databaseInstanceName="Connection String" writeLogStoredProcName="EL_WRITELOG"
                addCategoryStoredProcName="EL_ADDCATEGORY" formatter="Text Formatter" />
            <add name="XML Trace Listener" type="Microsoft.Practices.EnterpriseLibrary.Logging.TraceListeners.XmlTraceListener, Microsoft.Practices.EnterpriseLibrary.Logging, Version=5.0.414.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"
                listenerDataType="Microsoft.Practices.EnterpriseLibrary.Logging.Configuration.XmlTraceListenerData, Microsoft.Practices.EnterpriseLibrary.Logging, Version=5.0.414.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"
                fileName="test.xml" />
        </listeners>
        <formatters>
            <add type="Microsoft.Practices.EnterpriseLibrary.Logging.Formatters.TextFormatter, Microsoft.Practices.EnterpriseLibrary.Logging, Version=5.0.414.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"
                template="&lt;TIMESTAMP&gt; {timestamp}&lt;/TIMESTAMP&gt; {newline}&#xA;&lt;MESSAGE&gt; {message}&lt;/MESSAGE&gt;{newline}&#xA;&lt;CATEGORY&gt;{category}&lt;/CATEGORY&gt;{newline}&#xA;&lt;PRIORITY&gt;{priority}&lt;/PRIORITY&gt;{newline}&#xA;&lt;EVENTID&gt;{eventid}&lt;/EVENTID&gt;{newline}&#xA;&lt;SEVERITY&gt;{severity}&lt;/SEVERITY&gt;{newline}&#xA;&lt;TITLE&gt;{title}&lt;/TITLE&gt;{newline}&#xA;&lt;MACHINE&gt;{localMachine}&lt;/MACHINE&gt;{newline}&#xA;&lt;APP DOMAIN&gt; {localAppDomain}&lt;/APP DOMAIN&gt;{newline}&#xA;&lt;PROCESSID&gt;{localProcessId}&lt;/PROCESSID&gt;{newline}&#xA;&lt;PROCESS NAME&gt; {localProcessName}&lt;/PROCESS NAME&gt; {newline}&#xA;&lt;THREAD NAME&gt; {threadName}&lt;/THREAD NAME&gt;{newline}&#xA;&lt;WIN32 THREADID&gt;{win32ThreadId}&lt;/WIN32 THREADID&gt;{newline}&#xA;&lt;EXTENDED PROPERTIES&gt; {dictionary(&lt;KEY&gt;{key}&lt;/KEY&gt; - &lt;VALUE&gt;{value}&lt;/VALUE&gt;{newline})}&lt;/EXTENDED PROPERTIES&gt;"
                name="Text Formatter" />
        </formatters>
        <categorySources>
            <add switchValue="All" name="General">
                <listeners>
                    <add name="Database Trace Listener" />
                    <add name="XML Trace Listener" />
                </listeners>
            </add>
        </categorySources>
        <specialSources>
            <allEvents switchValue="All" name="All Events" />
            <notProcessed switchValue="All" name="Unprocessed Category" />
            <errors switchValue="All" name="Logging Errors &amp; Warnings">
                <listeners>
                    <add name="Database Trace Listener" />
                    <add name="XML Trace Listener" />
                </listeners>
            </errors>
        </specialSources>
    </loggingConfiguration>
    <dataConfiguration defaultDatabase="Connection String" />
    <connectionStrings>
        <add name="Connection String" connectionString="DATA SOURCE=(DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 1521)))(CONNECT_DATA =(SERVER = DEDICATED)(SERVICE_NAME = eifoclog)));PERSIST SECURITY INFO=True;USER ID=FOC;Password=foc"
            providerName="System.Data.OracleClient" />
    </connectionStrings>
</configuration>

    class Program
    {
        static void Main(string[] args)
        {
            LogEntry logEntry = new LogEntry();
            logEntry.EventId = 1;
            logEntry.Priority = 1;
            logEntry.Severity = System.Diagnostics.TraceEventType.Error;
            logEntry.Title = "标题";
            logEntry.Message = "test";
            logEntry.Categories.Add("C#学习");
            logEntry.Categories.Add("Microsoft Enterprise Library学习");

            Logger.Writer.Write(logEntry, "General");
            Console.WriteLine("日志写入完成!");
        }
    }