/// <summary>
/// Gets the optional boolean attribute value.
/// </summary>
/// <param name="element"></param>
/// <param name="attributeName">Name of the attribute.</param>
/// <param name="defaultValue">Default value to return if the attribute is not found or if there is a parse error</param>
/// <returns>Boolean attribute value or default.</returns>
public static bool GetOptionalBooleanValue(this ILoggingConfigurationElement element, string attributeName,
bool defaultValue)
{
string value = element.GetOptionalValue(attributeName, null);
if (string.IsNullOrEmpty(value))
{
return(defaultValue);
}
try
{
return(Convert.ToBoolean(value.Trim(), CultureInfo.InvariantCulture));
}
catch (Exception exception)
{
var configException = new NLogConfigurationException(exception, $"'{attributeName}' hasn't a valid boolean value '{value}'. {defaultValue} will be used");
if (configException.MustBeRethrown())
{
throw configException;
}
InternalLogger.Error(exception, configException.Message);
return(defaultValue);
}
}
public static string GetRequiredValue(this ILoggingConfigurationElement element, string attributeName, string section)
{
string value = element.GetOptionalValue(attributeName, null);
if (value == null)
{
throw new NLogConfigurationException($"Expected {attributeName} on {element.Name} in {section}");
}
if (StringHelpers.IsNullOrWhiteSpace(value))
{
throw new NLogConfigurationException(
$"Expected non-empty {attributeName} on {element.Name} in {section}");
}
return(value);
}
public static string GetConfigItemTypeAttribute(this ILoggingConfigurationElement element, string sectionNameForRequiredValue = null)
{
var typeAttributeValue = sectionNameForRequiredValue != null?element.GetRequiredValue("type", sectionNameForRequiredValue) : element.GetOptionalValue("type", null);
return(StripOptionalNamespacePrefix(typeAttributeValue)?.Trim());
}
