asked on

serialize a class write to file

I am going to be using c# to write the contents of a class to a text file. I want to just append to the file each time I write.

I want to get the contents back by reading the classes (all the same) into a generic list.

1. How can I write to the file?
2. How can I read back from the file into a list?

Jaime Olivares

You can store into an XML file.
XmlSerializer xs = new XmlSerializer(typeof(yourListclass));
xs.Serialize(yourfilestream, yourListobject);
if you want to deserialize use:
yourListobject = (yourListClass) xs.Deserialize(yourfilestream);

jackjohnson44

ASKER

thanks, but what if I keep appending to my text file? Will the list work? What I mean is I am not putting a list into a text file. I am putting classes in a text file and want a list out.

I guess I could read the whole thing into a list, add to the list, then write back, but I would rather just append.

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Jaime Olivares

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jackjohnson44

ASKER

I am gettting this error:

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System.InvalidOperationException: There is an error in XML document (0, 0). ---> System.Xml.XmlException: Root element is missing.

at System.Xml.XmlTextReaderImpl.Throw(Exception e)

at System.Xml.XmlTextReaderImpl.ThrowWithoutLineInfo(String res)

at System.Xml.XmlTextReaderImpl.ParseDocumentContent()

at System.Xml.XmlTextReaderImpl.Read()

at System.Xml.XmlTextReader.Read()

at System.Xml.XmlReader.MoveToContent()

at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReaderList1.Read6_ArrayOfRNetFileEvent()

--- End of inner exception stack trace ---

at System.Xml.Serialization.XmlSerializer.Deserialize(XmlReader xmlReader, String encodingStyle, XmlDeserializationEvents events)

at System.Xml.Serialization.XmlSerializer.Deserialize(XmlReader xmlReader, String encodingStyle)

at System.Xml.Serialization.XmlSerializer.Deserialize(TextReader textReader)

at RNetWordAddIn.ThisAddIn.GetFileInformation(Document Doc) in C:\Ihi2\SharePoint\OfficeTools\WordAddIn\ThisAddIn.cs:line 62
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OK
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