Muhammad Tahir Muhammad Tahir - 2 months ago 22
C# Question

How to? XML Serialization of a Class Object

I am trying to Serialize a Class object and store the xml in a string but each time I get an exception message "There was an error generating xml document"

The class object I am trying to serialize is of class:

[XmlRoot("FlowOfTask")]
public class Flow
{
int _CurrHop = 0;

[XmlElement("CurrentHop")]
public int CurrentHop
{
get { return _CurrHop; }
set { _CurrHop = value; }
}

int _TotalHops = 0;

[XmlElement("TotalHops")]
public int TotalHops
{
get { return _TotalHops; }
}

private List<tblTaskHop> _TaskHops;

[System.Xml.Serialization.XmlArrayItemAttribute(ElementName = "Hop",
IsNullable = false)]
public List<tblTaskHop> TaskHops
{
get { return _TaskHops; }
}
public Flow()
{

}

public Flow(Int64 TaskID, Int64 RoleID)
{
_TaskHops = HandleDB.tblTaskHopGetByTaskIDRoleID(TaskID, RoleID);
_TotalHops = TaskHops.Count;
}

}


I am using this function to serialize.

public static string SerializeAnObject(object item)
{

try
{
string xmlText;

//Get the type of the object
Type objectType = item.GetType();

//create serializer object based on the object type
XmlSerializer xmlSerializer = new XmlSerializer(objectType);

//Create a memory stream handle the data
MemoryStream memoryStream = new MemoryStream();

//Create an XML Text writer to serialize data to
using (XmlTextWriter xmlTextWriter =
new XmlTextWriter(memoryStream, Encoding.UTF8) { Formatting = Formatting.Indented })
{

//convert the object to xml data
xmlSerializer.Serialize(xmlTextWriter, item);

//Get reference to memory stream
memoryStream = (MemoryStream)xmlTextWriter.BaseStream;

//Convert memory byte array into xml text
xmlText = new UTF8Encoding().GetString(memoryStream.ToArray());

//clean up memory stream
memoryStream.Dispose();
return xmlText;
}
}
catch (Exception e)
{
MessageBox.Show(e.Message);
return null;
}
}


Can anyone help me why I am not able to serialize this class object?

Answer

Your serialization method should look like this:

public static string SerializeAnObject(Object item) {
    if (item == null)
        return null;

    var stringBuilder = new StringBuilder();
    var itemType = item.GetType();

    new XmlSerializer(itemType).Serialize(new StringWriter(stringBuilder), item);

    return stringBuilder.ToString();
}

The function above works when I test it like this:

var test = new Flow();
var xmlString = SerializeAnObject(test);
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