Postback AFTER client side filter has been applied

[Joaquín]

Hi guys,

I have a grid which allows filtering by columns. I need the filter to perform a postback after a filter has been applied. Is there any way to do it?

I have tried using AutoPostBackOnFilter="true", but it performs the postback before the filter has been applied in the client. The reason for which I need this is to enable or disable some radbuttons depending on the results of the filter; for example, if there are no rows once the filter has been applied, I want to disable the 'Edit' radbutton.

I have tried to do it client side, using the onGridCreated event:

var usuarioEsSupervisor;
        function afterGridCreation() {
// Called from onGridCreated
                // Mostrar el número de registros que hay en el grid

                var grid = $find("<%= gridIncidencias.ClientID %>");
                var MasterTable = grid.get_masterTableView();
                var Rows = MasterTable.get_dataItems();
                var filas = Rows.length;

                var etiqueta = $get("<%=lblNumberOfIssues.ClientID %>");
                etiqueta.innerHTML = filas;


                // Desactivar los botones de eliminar y editar si el grid no contiene registros
                var botonDelete = $find("<%=btnDeleteIssue.ClientID %>");
                var botonDetails = $find("<%=btnEditIssue.ClientID %>");

                if (filas > 0) {

                    if (usuarioEsSupervisor) {
                        botonDelete.set_enabled(true);
                    }
                    botonDetails.set_enabled(true);
                }
        }

 However, for some reason that I dont know, the vars botonDelete and botonDetails get null value and, therefore, I cannot reach the buttons.

Any idea please? Thank you.

[Eyup]

Hi Joaquín,

Thank you for contacting us.

Please try the following approach:

protected void RadGrid1_ItemEvent(object sender, GridItemEventArgs e)
{
    if (e.EventInfo is GridInitializePagerItem)
    {
        int totalRowCount = (e.EventInfo as GridInitializePagerItem).PagingManager.DataSourceCount;
        Button1.Enabled = (totalRowCount != 0);
    }
}

That should do the trick. Please give it a try and let me know about the result.

All the best,
Eyup
the Telerik team

[Joaquín]

Hi Eyup,

Thank you for your reply. I have not been able to implement the solution that you have suggested. However, finally I got the desired behaviour using:

Protected Sub gridIncidencias_ItemCommand(sender As Object, e As Telerik.Web.UI.GridCommandEventArgs) Handles gridIncidencias.ItemCommand

        Select Case e.CommandName

            Case "Filter"
                gridIncidencias.Rebind()

        End Select

and then, in

Protected Sub gridIncidencias_DataBound(sender As Object, e As System.EventArgs) Handles gridIncidencias.DataBound

I perform the adjusts I need.

Joaquín

[Eyup]

Hello Joaquín,

Please do not forget to cancel the original Filter command using e.Canceled=true to avoid double rebinding the grid.

Greetings,
Eyup
the Telerik team