How to Export DGV to XML

[Michael Warlich]

Hi Everybody

i have a datagridview in VB.NET which is filled with an XML file this way:

Dim xmlDataDoc As New XmlDataDocument
Dim ds As New DataSet("Book Dataset")

xmlDataDoc.DataSet.ReadXml("D:\books.xml")
ds = xmlDataDoc.DataSet
DataGridView1.DataSource = ds.DefaultViewManager
DataGridView1.DataMember = "Book"

When i make Changes in the DGV, i want wo save them back to the
XML-File. But i don't know how!

i tried:

Dim DS As DataSet
' --- DataSet erzeugen
DS = New System.Data.DataSet()
DS = DataGridView1.DataSource
DS.WriteXml("D:\ddd.xml", XmlWriteMode.WriteSchema)

what is wrong? the problem is: i cant make a DataSet out of the dgv with
DS = DataGridView1.D ataSource.
What else can i do?

Thanks
MIchael