I have a XML file like that:
<?xml version="1.0" encoding="utf-8"?>
<UserData>
<Users>
<User>
<Name>TestName1</Name>
<Password>Password1</Password>
<Level>1</Level>
</User>
<User>
<Name>TestName2</Name>
<Password>PAssword2</Password>
<Level>2</Level>
</User>
</Users>
</UserData>
Based on that XML structure i deserialize it using this two classes:
[Serializable()]
public sealed class User
{
[System.Xml.Serialization.XmlElement("Name")]
public string Name { get; set; }
[System.Xml.Serialization.XmlElement("Password")]
public string Password { get; set; }
[System.Xml.Serialization.XmlElement("Level")]
public string Level { get; set; }
}
[System.Xml.Serialization.XmlRoot("UserData")]
public class UserData
{
[XmlArray("Users")]
[XmlArrayItem("User", typeof(User))]
public User[] Users { get; set; }
}
The implementation for the deserialization looks like:
private void ParseXMLCfg()
{
StreamReader reader = new StreamReader(_cfgFileDir);
try
{
XmlSerializer serializer = new XmlSerializer(typeof(UserData));
_users = (UserData)serializer.Deserialize(reader);
}
catch (InvalidOperationException e)
{
_logger.DebugFormat("{0}", e);
}
reader.Close();
}
Everything works fine so far. But my problem is that my class does not implement IEnumerable. So i can not iterate through the array using foreach. How can i implement IEnumerable to my UserData
class?
One of my approaches was like that:
[System.Xml.Serialization.XmlRoot("UserData")]
public class UserData:IEnumerable
{
[XmlArray("Users")]
[XmlArrayItem("User", typeof(User))]
public User[] Users { get; set; }
// IEnumerable Member
public IEnumerator GetEnumerator()
{
foreach (object o in Users)
{
if(o == null)
{
break;
}
yield return o;
}
}
}
But it does not work.
What would be the way to implement IEnumerable for this class? Is there also a way to implement IEnumerable, because finally i would like to deserialize to a List instead of an array of users.
Users[]
already implements IEnumerable
, so you don't have to make your own implementation. Just call the one of the underlying object:
// IEnumerable Member
public IEnumerator GetEnumerator()
{
return Users.GetEnumerator();
}
While you're at it, it's better to implement the generic version of IEnumerable
:
[System.Xml.Serialization.XmlRoot("UserData")]
public class UserData : IEnumerable<User>
{
[XmlArray("Users")]
[XmlArrayItem("User", typeof(User))]
public User[] Users { get; set; }
// IEnumerable Member
public IEnumerator GetEnumerator()
{
return this.Users.GetEnumerator();
}
IEnumerator<User> IEnumerable<User>.GetEnumerator()
{
return ((IEnumerable<User>)this.Users).GetEnumerator();
}
}
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