CODEWITHSUNDEEP
c#xml
Madrical
Madrical

Reputation: 33

Serialization of XML Document (System.InvalidOperationException)

I'm attempting to setup my first export/import of a list to/from an external XML file. Upon start I have the following code:

        private void Form1_Load(object sender, EventArgs e)
    {
        string path = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
        if (!Directory.Exists("C:\\Temp"))
            Directory.CreateDirectory("C:\\Temp");
        if (!File.Exists("C:\\Temp\\mygames.xml"))
            File.Create("C:\\Temp\\mygames.xml").Close();
        //Call method to read data from XML to List<>
        videogame = ReadFromXmlFile<List<vglist>>("C:\\Temp\\mygames.xml");
        displayList();
    } // END of method Form1_Load

With the ReadFromXmlFile method as follows:

    public static T ReadFromXmlFile<T>(string filePath) where T : new()
    {
        TextReader reader = null;
        try
        {
            var serializer = new XmlSerializer(typeof(T));
            reader = new StreamReader(filePath);
            return (T)serializer.Deserialize(reader);
        } // end try
        finally
        {
            if (reader != null)
                reader.Close();
        } // end finally
    } // END ReadFromXmlFile<T> method

But I keep getting the following error upon execution of the program:

Exception thrown: 'System.InvalidOperationException' in System.Xml.dll

An unhandled exception of type 'System.InvalidOperationException' occurred in System.Xml.dll

Additional information: There is an error in XML document (0, 0).

My class is set up as follows:

public class vglist
{
    [XmlElement("gameName")] // XML tag
    public string GameName // game field
    {
        get;
        set;
    }
etc...

Any ideas? I've search everywhere with similar problems but no solutions which are helping.

Upvotes: 0

Views: 121

Answers (1)

jbmintjb
jbmintjb

Reputation: 133

Looks like if the file does not exist, your creating a new blank XML file. I suspect your error is due to the XML file containing nothing.

Upvotes: 1

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