or
Protected Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
For Each item As GridDataItem In RadGrid1.Items
item.Style("background-color") = "#FFFFFF"
Next
RadGrid1.MasterTableView.BorderStyle = BorderStyle.None
Dim fileName As String = "myExceltest.pdf"
RadGrid1.MasterTableView.ExportToPdf()
End Sub