[ajaxpro] Problems with Ajax Pro.. Please help!!!!

[Alexandro Velarde]

I'm a new with ajax pro, so please understand my unacurate form of 
programming!!!

Please help me out with this issue, I have a function on my server site 
code, named LoadData, which received one parameter
with in order to execute a store procedure and return a lot of data.  When I 
do this, my browser hangs and I can't do anything,
Please let me know how to make this code better.

I have read on this page that I need to pass another argument, but I don't 
really understand this.
http://www.ajaxpro.info/Examples/Classes/default.aspx


here is my client side code:

function LoadGrid()
    {
     var est=ListValues( document.getElementById('lstEstudioDestiny'));
     var res;
     res=Evolucion.LoadData(est).value;
     document.getElementById('spMensaje').innerHTML=res[0];
     document.getElementById('spCampana').innerHTML=res[1];
}


here is my server side code:

<Ajax.AjaxMethod()> Public Function LoadData(ByVal idEstudio As String) As 
ArrayList

        Dim result As New ArrayList

        Try
            'Tipo de Mensaje
            Dim tMensaje As New OBLTMensaje
            Dim lstTmensaje As New ListBox
            lstTmensaje.ID = "lstTMensaje"
            lstTmensaje.Attributes.Add("ondblclick", "MoverUno(lstTMensaje, 
Sel14)")

            result.Add( _
            MapeaLista(lstTmensaje, tMensaje.ListarTMensaje(idEstudio), _
            "DESCRIPCION", "CODIGO"))

            'CAMPAÑA

            Dim lstCampana As New ListBox
            Dim campana As New OBLCampana
            lstCampana.ID = "lstCampana"
            lstCampana.Attributes.Add("ondblclick", "MoverUno(lstCampana, 
Sel13)")
            result.Add( _
            MapeaLista(lstCampana, campana.ListarCampana(idEstudio), 
"DESCRIPCION", "CODIGO"))

            'AVENIDAS

            Dim lstAvenida As New ListBox
            Dim avenida As New OBLAvenidas
            lstAvenida.ID = "lstAvenida"
            lstAvenida.Attributes.Add("ondblclick", "MoverUno(lstAvenida, 
Sel43)")
            result.Add( _
            MapeaLista(lstAvenida, avenida.ListarAvenidas(idEstudio), 
"DESCRIPCION", "CODIGO"))

        Catch ex As Exception
            result.Add(ex.Message)
        End Try

        Return result

    End Function

I'll wait for your response..
Thanks a lot

Alexandro


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