Question : Refresh data in a Bound datagridview VB.NET

I have a datagridview in a Windows Forms Vb.NET App. The datagridview is filled in the following manner.
Dim daLines As New SqlDataAdapter("Select L.CIV_LINE_ID, L.CIV_HD_ID, L.LINE_NO, L.PRODUCT_CODE from IMPORTED_CIV_LINES L  WHERE L.CIV_HD_ID = '" & grdInvoiceList.CurrentRow.Cells(7).Value.ToString & "'", dbacotconn)

        daLines.Fill(dslines, "LINES")
        grdLines.DataSource = dslines
        grdLines.DataMember = "LINES"

As I do some cell formatting the dslines is declared as a public var.
The datagridview is filled when the user selects a row in another grid.
What I have found is that the datagridview is not clearing. The results are appending to the results of the last time it was filled. I thought I would then perhaps try to delete the contents of the datagridview and re-fresh/re-read when the DA Filled the DS. I cannot get this to work.
Can anybody provide me an easier way of refreshing data in a datagridview from a Dataset ???

Answer : Refresh data in a Bound datagridview VB.NET

... or just

    dslines.Tables("LINES").Clear

The problem is not in the DataGridView, it is in the DataTable.  The DataAdapter's .Fill method just adds, to any existing records in a DataTable, those covered by its current SELECT statement which are not already present.  So you need to get rid of existing records from the DataTable before re-filling it.

Roger