XML反序列化

Question

Trying to deserialize a XML log file. And cannot seem to get anything but Error in XML Document(0,0). I am guessing it has something to do with my class but I cannot seem to find a solution. I cannot change the XML formatting as this is a log file coming from a server (just simplified)

XML

<?xml version="1.0" encoding="utf-8"?>
<POSLog>
<Transaction>
  <RetailStoreID>1</RetailStoreID>
  <SequenceNumber>2</SequenceNumber>
</Transaction>
<Transaction>
  <RetailStoreID>1</RetailStoreID>
  <SequenceNumber>3</SequenceNumber>
</Transaction>
</POSLog>

Class

[Serializable()]
public class Transaction
{
    [XmlElement("RetailStoreID")]
    public string RetailStoreID { get; set; }

    [XmlElement("SequenceNumber")]
    public string SequenceNumber { get; set; }

}

[Serializable()]
[XmlRoot("POSLog")]
public class POSLog
{
    [XmlArray("POSLog")]
    [XmlArrayItem("Transaction", typeof(Transaction))]
    public Transaction[] Transaction { get; set; }
}

Deserialize code

POSLog poslog = new POSLog();
string path = "POSLog.xml";
XmlSerializer serializer = new XmlSerializer(typeof(POSLog));
StreamReader reader = new StreamReader(path);
poslog = (POSLog)serializer.Deserialize(reader);

Found fix by switching from StreamReader to FileStream along with changes to the class. Changing encoding didn't seem to help when using the StreamReader.

Answer 1

I cannot reproduce the problem you are seeing. However, there is an issue with the POSLog class -- it needs to be defined as follows:

[Serializable()]
[XmlRoot("POSLog")]
public class POSLog
{
    [XmlElement("Transaction")]
    public Transaction[] Transaction { get; set; }
}   

Your XML has a root element <POSLog> containing a repeating sequence of <Transaction> elements. [XmlElement("Transaction")] maps the array to just such a one-level repeating sequence.

Example fiddle .

Answer 2

Changing the Class to the follow above answer

[Serializable()]
[XmlRoot("POSLog")]
public class POSLog
{
    [XmlElement("Transaction")]
    public Transaction[] Transaction { get; set; }
}   

Along with Changing the following StreamReader lines

StreamReader reader = new StreamReader(path);
poslog = (POSLog)serializer.Deserialize(reader);

To this:

FileStream fs = new FileStream(path, FileMode.Open);
poslog = (POSLog)serializer.Deserialize(fs);

Fixed the issue I was having with the root element and I was able to deserialize the XML. Thanks to dbc for help in getting me started solving a solution for the first time in a forum!