vb.net problem about refresh pictures in datagridview

[lucoin]

as add imagecolumn to the datagridview which contains the photo path.
the problem I have to click the button twice, then the picture comes. the code as follows.

        Dim ds As DataSet
        ds = AuctionComm.GetAuctions()
        dgAuction.Columns.Clear()
        dgAuction.Columns.Add(PhotoColumn)
        dgAuction.DataSource = ds.Tables("Auctions")
        RefreshRows(dgAuction)
        With PhotoColumn
            .ImageLayout = DataGridViewImageCellLayout.Zoom
            .Name = "Details"
        End With

        Dim rowcount As Integer = datagridview1.Rows.Count()
        For i As Integer = 0 To rowcount - 1
            PhotoColumn.DataGridView.Rows(i).Cells("Details").Value = Image.FromFile(Application.StartupPath + datagridview1.Rows(i).Cells("Photo").Value.ToString())
        Next

I tried to place the loop to any where wthin the code area, but all dosen't works.

Anybody help.