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c#xmlwindows-phone-7serializationxml-serialization
Feels Good Man
Feels Good Man

Reputation: 103

Remove multiple XML declarations in XML

The app should add the nodes from time to time to Goals.xml file. So its dynamic. The code that adds the nodes:

XmlWriterSettings settings=new XmlWriterSettings();  
settings.OmitXmlDeclaration= true;
settings.Indent = true;
settings.IndentChars = ("\t");

using (IsolatedStorageFile myIsolatedStorage = 
    IsolatedStorageFile.GetUserStoreForApplication())
using (IsolatedStorageFileStream stream = 
    myIsolatedStorage.OpenFile("Goals.xml", FileMode.Append))
{
    XmlSerializer serializer = new XmlSerializer(typeof(List<Goals>));
    using (XmlWriter xmlWriter = XmlWriter.Create(stream, settings))
    {
        serializer.Serialize(
            xmlWriter, 
            GenerateGoalsData(name, description, progress));
    }
}

and

private List<Goals> GenerateGoalsData(
    string name, 
    string description, 
    string progress)
{
    List<Goals> data = new List<Goals>();
    data.Add(new Goals() { 
            Name=name, 
            Description=description, 
            Progress=progress});
    return data;
}

and also I have class Goals. But it generates bad XML:

<ArrayOfGoals xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xmlns:xsd="http://www.w3.org/2001/XMLSchema">
    <Goals>
        <Name>Jack</Name>
        <Description>lalala</Description>
        <Progress>97</Progress>
    </Goals>
</ArrayOfGoals>
<ArrayOfGoals xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xmlns:xsd="http://www.w3.org/2001/XMLSchema">
    <Goals>
        <Name>Taaaaaa</Name>
        <Description>nanana</Description>
        <Progress>50</Progress>
    </Goals>
</ArrayOfGoals>

How to remove in XML the repeated:

</ArrayOfGoals>
<ArrayOfGoals xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xmlns:xsd="http://www.w3.org/2001/XMLSchema">

so the XML looks like that:

<ArrayOfGoals xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xmlns:xsd="http://www.w3.org/2001/XMLSchema">
    <Goals>
        <Name>Jack</Name>
        <Description>lalala</Description>
        <Progress>97</Progress>
    </Goals>
    <Goals>
        <Name>Taaaaaa</Name>
        <Description>nanana</Description>
        <Progress>50</Progress>
    </Goals>
</ArrayOfGoals>

Or how to append the nodes without that string being automatically added?

Upvotes: 0

Views: 425

Answers (3)

Sue Hu
Sue Hu

Reputation: 111

XmlRootAttribute root = new XmlRootAttribute("Goals");     
XmlSerializer serializer = new XmlSerializer(typeof(List<Goals>), root);
XmlSerializerNamespaces ns = new XmlSerializerNamespaces();
ns.Add(string.Empty, string.Empty);   
using (XmlWriter xmlWriter = XmlWriter.Create(stream, settings))
{
    serializer.Serialize(xmlWriter, GenerateGoalsData(name, description, progress), ns)
}

Upvotes: 0

Alexei Levenkov
Alexei Levenkov

Reputation: 100547

The resulting file is invalid XML, so you will not be able to use it directly for deserialization as valid Xml.

But it is actually valid "Xml fragments" which can be read with standard classes: XmlReader can read fragments when specifying ConformanceLevel.Frament in XmlReaderSettings of XmlReader.Create call. I think you'll be even able to deserialize classes directly from such reader (not sure).

Side note: it would be much easier (but less problems and bugs) to read old data, append what you need and serialize back as whole file.

Upvotes: 2

L.B
L.B

Reputation: 116138

Deserialize your data, add new values and serialize. But Use FileMode.Create instead of FileMode.Append

Upvotes: 2

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