I'm writing in C# and trying to represent an XML config file through an IXmlSerializable class. I'm unsure how to represent
the nested elements in my config file, though, such as logLevel:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<logging>
<logLevel>Error</logLevel>
</logging>
<credentials>
<user>user123</user>
<host>localhost</host>
<password>pass123</password>
</credentials>
<credentials>
<user>user456</user>
<host>my.other.domain.com</host>
<password>pass456</password>
</credentials>
</configuration>
There is an enum called LogLevel that represents all
the possible values for
the logLevel tag.
The tags
within credentials should all come out as strings. In my class, called DLLConfigFile, I had
the following:
[XmlElement(ElementName="logLevel", DataType="LogLevel")]
public LogLevel LogLevel;
However, this isn't going to work because <logLevel> isn't
within the root node of
the XML file, it's one node deeper in <logging>. How do I go about doing this?
As for
the <credentials> nodes, my guess is I will need a second class, say CredentialsSection, and have a property such as
the following:
[XmlElement(ElementName="credentials", DataType="CredentialsSection")]
public CredentialsSection[] AllCredentials;
Edit: okay, I tried Robert Love's suggestion and created a LoggingSection class. However, my test fails:
var xs = new XmlSerializer(typeof(DLLConfigFile));
using (var stream = new FileStream(_configPath, FileMode.Open,
FileAccess.Read, FileShare.Read))
{
using (var streamReader = new StreamReader(stream))
{
XmlReader reader = new XmlTextReader(streamReader);
var file = (DLLConfigFile)xs.Deserialize(reader);
Assert.IsNotNull(file);
LoggingSection logging = file.Logging;
Assert.IsNotNull(logging); // fails here
LogLevel logLevel = logging.LogLevel;
Assert.IsNotNull(logLevel);
Assert.AreEqual(EXPECTED_LOG_LEVEL, logLevel);
}
}
The config file I'm testing with definitely has <logging>. Here's what
the classes look like:
[Serializable]
[XmlRoot("logging")]
public class LoggingSection : IXmlSerializable
{
public XmlSchema GetSchema()
{
return null;
}
[XmlElement(ElementName="logLevel", DataType="LogLevel")]
public LogLevel LogLevel;
public void ReadXml(XmlReader reader)
{
LogLevel = (LogLevel)Enum.Parse(typeof(LogLevel),
reader.ReadString());
}
public void WriteXml(XmlWriter writer)
{
writer.WriteString(Enum.GetName(typeof(LogLevel), LogLevel));
}
}
[Serializable]
[XmlRoot("configuration")]
public class DLLConfigFile : IXmlSerializable
{
[XmlElement(ElementName="logging", DataType="LoggingSection")]
public LoggingSection Logging;
}
