How to deselect rows on ASP.NET( VB.net) GridView control

  Protected Sub GridView1_RowDataBound(sender As Object, e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridView1.RowDataBound

        If e.Row.RowType = DataControlRowType.DataRow Then

            'TO DO: make script a global variable

            Dim script = "document.getElementByID('" & cans.ClientID & "').click();"

            e.Row.Attributes.Add("onclick", script)

        End If

    End Sub

Protected Sub cans_Click(sender As Object, e As System.EventArgs) Handles cans.Click

        GridView1.SelectedIndex = -1

    End Sub