Confirming whether an elemet with a specific attribute exists in app.Config file

EDN Admin · Aug 29, 2011

Hi,

i have following App.Config file:
<?xml version="1.0"?> 
<configuration> 
<configSections> 
<section name="RUCVD-03" type="System.Configuration.AppSettingsSection"/> 
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/> 
<section name="EventTraceHelper" type="System.Configuration.AppSettingsSection"/> 
 
<section name="EMHelper" type="System.Configuration.AppSettingsSection"/> 
</configSections> 
<appSettings> 
 
<add key="DeviceName" value="RUCVD-03"/> 
</appSettings> 
 
<EMHelper> 
<add key="DatabaseName" value="ERRORMANAGEMENT"/> 
<add key="DatabaseType" value="Development"/> 
<add key="TSDSystem" value="TEST"/> 
<add key="ConnectionType" value="dev"/> 
<add key="TopicDomain" value="WDNCF"/> 
<add key="TopicType" value="dev"/> 
<add key="ReplyTimeoutSeconds" value="30"/> 
<add key="StorageType" value="XML"/> 
 
<add key="ErrorsFile" value="ErrorConfig.xml"/> 
<add key="ToolID" value="RUCVD-03"/> 
<add key="ErrorsFilePath" value=".\local\config\"/> 
</EMHelper> 
 
<log4net> 
<appender name="DebugFileAppender" type="log4net.Appender.RollingFileAppender 
<file value="locallogsApplnTrace.log"/> 
<threshold value="INFO"/> 
<appendToFile value="true"/> 
<rollingStyle value="Date"/> 
<datePattern value="yyyyMMdd"/> 
<layout type="log4net.Layout.PatternLayout 
<param name="ConversionPattern" value="%d [%5p] - (%file:%line) %m%n"/> 
</layout> 
</appender> 
<logger name="ApplnLogger 
<appender-ref ref="DebugFileAppender"/> 
</logger> 
<appender name="ErrorFileAppender" type="log4net.Appender.RollingFileAppender 
<file value="locallogsError.log"/> 
<threshold value="DEBUG" /> 
<appendToFile value="true" /> 
<maximumFileSize value="100MB" /> 
<maxSizeRollBackups value="10" /> 
<datePattern value="yyyyMMdd" /> 
<layout type="log4net.Layout.PatternLayout 
<param name="ConversionPattern" value="%d [%5p] - %m%n" /> 
</layout> 
</appender> 
<logger name="ErrorLogger 
<appender-ref ref="ErrorFileAppender"/> 
</logger> 
</log4net> 
 
</configuration>
i need to confirm whether under ,log4net> section, whether <logger name="ErrorLogger has been defined.
I have following code, but does not seem to work.
private void button_GetLogFileSetting_Click(object sender, EventArgs e) 
{ 
// Get the App.Config file path 
// Pass it to function that grabs the log4net section 
// check whether ErrorLog element exists 
bool log4netSectionExists = false; 
bool ErrorLoggerExists = false;
try 
{ 
System.Configuration.Configuration config = 
ConfigurationManager.OpenExeConfiguration( 
ConfigurationUserLevel.None);
 
ConfigurationSectionCollection sections = 
config.Sections;
foreach (string key in sections.Keys) 
{ 
if (key == "log4net") 
{ 
Label_ResultsMessage.Text += string.Format("Key value: {0}", key); 
log4netSectionExists = true; 
} 
}
if (log4netSectionExists) 
{ 
// check whether ErrorLog element exists 
try 
{ 
// use config.FilePath 
try 
{ 
XElement elLog4net = XElement.Load(config.FilePath);
IEnumerable<XElement> errorLogger = 
from el in elLog4net.Elements("logger") 
where (string)el.Attribute("name") == "ErrorLogger"
//ApplnLogger 
select el;
if (errorLogger != null) { 
foreach (XElement el in errorLogger) 
{ 
ErrorLoggerExists = true; 
} 
}
if (ErrorLoggerExists == true) 
{
Label_ResultsMessage.Text += "nFound ErrorLogger!"; 
} 
else { Label_ResultsMessage.Text += "nErrorLogger NOT FOUND!"; } 
} 
catch (Exception Ex) 
{ 
throw; 
}
} 
catch (ConfigurationErrorsException err) 
{ 
Console.WriteLine(err.ToString()); 
}
} 
} 
catch (ConfigurationErrorsException err) 
{ 
Console.WriteLine(err.ToString()); 
}
}
how can i correct it please?
Thank you. - Piyush <hr class="sig piyush varma

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Confirming whether an elemet with a specific attribute exists in app.Config file

EDN Admin

Well-known member