Reading all rows in a column of a dataset

[AliBail]

I have loaded the contents of an XML file into a dataset, and then into a datagrid.

But I am stuck with this (probably simple thing),

How do you read data from a specific field / column, or find out how many records / rows exist, in preferably the dataset. But if not possible, in the datagrid.

Thanks in advance for any help you can offer.

        Dim d As New DataSet()

        Try
            d.ReadXml("C:\test.xml")
            Me.DataGrid1.DataSource = d

        Catch exp As Exception
            MessageBox.Show(exp.Message.ToString, "Exception was caught", MessageBoxButtons.OK)
        End Try

        ds = d.Copy
        DataGrid1.DataSource = ds
        DataGrid1.Refresh()
        d.Dispose()