Typed DataSets and XML sources | Tech Off

W3bbo
The Master of Baiters

I've written an XML Schema (*.xsd) file by hand to define an XML file format I'm going to use to store some structured data in. After hearing good things about Typed DataSets working with XML files I used the xsd.exe program to create a DataSet from my XSD.

The thing is... it doesn't seem to work at all.

I've got a regular DataSet and my typed DataSet ("MyDataSet") , both reading data from the same XML file.

...yet it doesn't seem to work:

            DataSet ds = new DataSet();
            ds.ReadXml      ( packageExamplePath );

            System.Console.WriteLine( ds.Tables["extra"].Rows.Count ); // prints 19

            MyDataSet st = new MyDataSet();
            st.ReadXml( packageExamplePath );

            System.Console.WriteLine( st.Tables["extra"].Rows.Count ); // prints 0

Am I missing something important? Do I need to include a reference to the XML schema namespace in the source data XML document or something? I've read MSDN but couldn't find anything relevant.

jh71283
Throw new System.Beverage. OutOfCoffeeException()

For the typed dataset to read the xml, The root node must match the name of your dataset.

I assume your dataset starts with <DataSet> whereas it should be <MyDataSet> for the typed one to read it.

NB. It's case sensitive, too.

W3bbo
The Master of Baiters

In reply to jh71283

#Nov 27th, 2008 @ 6:35 AM

The XML file starts off with:

<package>

My constructor for my dataset class looks like:

public Package() : base("package") {

this.BeginInit();
            this.InitClass();

            CollectionChangeEventHandler schemaChangedHandler = new CollectionChangeEventHandler(this.SchemaChanged);

            base.Tables.CollectionChanged += schemaChangedHandler;
            base.Relations.CollectionChanged += schemaChangedHandler;

            EndInit();

}

Still doesn't work though.