[CLOSED] Reading grid in the server

[Pablo_Azevedo]

To read grids values posted back to the server, we do the following:

Put this javascript in the event that will cause the postback, i.e. button click:

<ext:Button ID="btExcluir" runat="server" SkinID="btExcluirSkin">
                        <DirectEvents>
                            <Click>
                                <ExtraParams>
                                    <ext:Parameter Name="Perfis" Value="Ext.encode(#{gvPerfis}.getRowsValues({selectedOnly:false}))"
                                        Mode="Raw" />
                                </ExtraParams>
                            </Click>
                        </DirectEvents>
                    </ext:Button>

And in the server we do this to get the value:

string jsonPerfis = e.ExtraParams["Perfis"];
PerfilAcesso[] rowsPerfis = JSON.Deserialize<PerfilAcesso[]>(jsonPerfis);

Is there an easier approach to get the values from a store in the server without using javascrpit in each event and JSON?
Isn't there a way to read the store or the grid data directly, the same way i can read a TextField?

[Daniil]

Hi,

The Store/GridPanel data is not sent to server automatically. Here are the details.
http://forums.ext.net/showthread.php...ll=1#post43229

So, you should do it manually as you do.

Though you could improve that in two ways.

1. Set up a default extra parameter for each DirectEvent/DirectMethod. Like this:
http://forums.ext.net/showthread.php...ll=1#post78639

2. Listen the Store Load and/or DataChanged events to set up the value for some Hidden field, then read its value on server.

Personally, I would prefer to send the Store/GridPanels data to server for the events only which require this data.

[Pablo_Azevedo]

Hi Daniil,

Understood, it would really be expensive to send the store to the server on every postback, but please consider creating a way to ease the process in a way that the developer wouldn't have to manually attach the javascript in the parameter every time, deserialize the value, etc.

I created these methods in our framework to ease the process:

    private static String GetGridSubmitParamName(Store store)
        {
            return String.Format("__SUBMITPARAM_{0}", store.ID);
        }

       public static void ConfigureButtonForStoreDataSubmit(ComponentDirectEvent directEvent, Store storeToBeSubmitted)
        {
            directEvent.ExtraParams.Add(
                            new Parameter()
                            {
                                Mode = ParameterMode.Raw,
                                Name = GetGridSubmitParamName(storeToBeSubmitted),
                                Value = String.Format("Ext.encode(#{{{0}}}.getRecordsValues())", storeToBeSubmitted.ID)
                            });
        }

        public static void LoadStoreValue<T>(Store store, DirectEventArgs e)
        {
            String parameterValue = e.ExtraParams[GetGridSubmitParamName(store)];
            store.DataSource = Ext.Net.JSON.Deserialize<T>(parameterValue);
        }

[Daniil]

Please clarify do you have any concrete suggestions? We would be happy to build in the toolkit.

Generally, the process doesn't look difficult since a developer just needs to call the getRowsValues or getRecordsValues methods (one code line) and deserialize it on server by calling the JSON.Deserialize method (also, one code line).