Modal popup closed when i pressed edit button in gridview.

Hi guys,

I display my gridview by modal popup. it will close automatically when i click 'edit' button inside the gridview.

How can i keep my modal popup when i editing my gridview?

pls advice. TQ

Protected Sub GridView1_RowEditing(ByVal sender As Object, ByVal e As GridViewEditEventArgs)

        GridView1.EditIndex = e.NewEditIndex
        GridView1.DataSource = DirectCast(ViewState("dt"), DataTable)
        GridView1.DataBind()

    End Sub