Question

Does any body know how to write an XML from a Dataset that has multiple tables with multiple parent rows?

Scenario:
I have five children relations to a table, this makes 5 foreign keys on the parent table; and this parent table has its own parent.
All Tables contain data and I want to export it to an XML file.

In order to do this, the code I use is:

DataSet dataSet = dataSource as DataSet;

SaveFileDialog dialog = new SaveFileDialog();
dialog.FileName = dataSet.DataSetName;
dialog.Filter = "XML files (*.xml) | *.xml";

if (dialog.ShowDialog() == DialogResult.OK)
{
    dataSet.EnforceConstraints = false;

    dataSet.WriteXml(dialog.FileName, XmlWriteMode.WriteSchema);
}

Every time I debug and hit the dataSet.WriteXml line I get this error message:

Cannot proceed with serializing DataTable 'Table_Name'. It contains a
DataRow which has multiple parent rows on the same Foreign Key.

Any ideas on why this happens and how to solve it?

Thanks in advance.

Answer 1

The problem was resolved after deleting the data in a table and new data was inserted. Since the DB does not have a constraint and the constraint is upon the dataset’s FK relationship, thare is were it failed.

The proper solution is to set up a FK constraint in the database, instead of doing it in the dataset alone.

Thanks guys, your answers guide me through.