Datagridview hide button

You need to use the ItemDataBound event (VS2002/2003) or the RowDataBound event (VS2005). This is fired wheneverr a row is added to the datagrid. The following code is taken from an artilce I wrote a while back for VS2003:

Private Sub dgResults_ItemDataBound(ByVal sender As System.Object, ByVal e As System.Web.UI.WebControls.DataGridItemEventArgs) Handles dgResults.ItemDataBound
    If e.Item.ItemType = ListItemType.Item Or e.Item.ItemType = ListItemType.AlternatingItem Then

        If CType(CType(e.Item.DataItem, DataRowView).Row.Item(0), Integer) < 0 Then
            e.Item.Cells(0).Text = "&nbsp;"
            e.Item.BackColor = System.Drawing.Color.White
        End If

    End If

End Sub

What it is doing is checking the value in the first column of the current row of the dataset and carrying out a task based on the result. What you want to do is very similar.

The following is code I use in a VS2005 app to do a smiliar thing:

Protected Sub LeaveRequests_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles LeaveRequests.RowDataBound

        Dim boundRow As Dgc.Fls.Engine.LeaveRequests.RequestListRow

        Dim statusCell, cancelCell As TableCell

        If e.Row.RowType = DataControlRowType.DataRow Then
            boundRow = CType(CType(e.Row.DataItem, System.Data.DataRowView).Row, _
                                   Dgc.Fls.Engine.LeaveRequests.RequestListRow)
            statusCell = e.Row.Cells(e.Row.Cells.Count - 2)
            cancelCell = e.Row.Cells(e.Row.Cells.Count - 1)
            Select Case boundRow.status_name
                Case REQUEST_PENDING
                    statusCell.CssClass = PENDING_STYLE
                Case REQUEST_REJECTED
                    statusCell.CssClass = REJECTED_STYLE
                    cancelCell.Controls.Clear()
                    For cellIndex As Integer = 0 To (e.Row.Cells.Count - 2)
                        If cellIndex = DURATION_COLUMN_INDEX Then
                            e.Row.Cells(cellIndex).CssClass = CANCELLED_RIGHT_TEXT_STYLE
                        Else
                            e.Row.Cells(cellIndex).CssClass = CANCELLED_TEXT_STYLE
                        End If
                    Next
                Case CANCELLATION_PENDING
                    statusCell.CssClass = PENDING_STYLE
                Case CANCELLATION_REJECTED
                    statusCell.CssClass = REJECTED_STYLE
                    statusCell.Text = REQUEST_APPROVED
                    cancelCell.Controls.Clear()
                Case CANCELLATION_APPROVED
                    cancelCell.Controls.Clear()
                    For cellIndex As Integer = 0 To (e.Row.Cells.Count - 2)
                        If cellIndex = DURATION_COLUMN_INDEX Then
                            e.Row.Cells(cellIndex).CssClass = CANCELLED_RIGHT_TEXT_STYLE
                        Else
                            e.Row.Cells(cellIndex).CssClass = CANCELLED_TEXT_STYLE
                        End If
                    Next

            End Select
        End If

    End Sub

In this case I am actually removing the button in the button column (cancelCell.Controls.Clear()) if the value in another column meets certain criteria.

Hope this helps

James :-)