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[CLOSED] Publish via Bus through DirectEvent

  1. #1
    Jan 05, 2015, 11:14 PM

    [CLOSED] Publish via Bus through DirectEvent

    I have passed simple variables (String, Integer) through the MessageBus and ExtraParameters, but never an Array within the data structure.

    On the client side I gather several data items, one of which is a list of selected Ids from a combobox, and publish them via the MessageBus.

    Building the list of product ids from the ComboBox that is multiSelect works, but is there a better way? Produces [31, 64].

    ...
   var products = new Array();
   for (var I = 0; I < App.comboBoxProducts.getSubmitArray().length; i++)
      products.push(App.comboBoxProducts.getSubmitArray()[i].value);

   var data = new Array();
   data[0] = Ext.String.trim(App.comments.getValue());
   data[1] = products;
   Ext.net.Bus.publish('RequestDialog.Finalize', data);
...
    I have a MessageBusDirectEvent that will catch the message and call the direct event passing the data.

    Am I passing the Array correctly or does it need to be encoded?
    ...
   <ext:MessageBusDirectEvent Name="" onEvent="Finalize">
      <ExtraParams>
         <ext:Parameter Name="Comments" Value="data[0]" Mode="Raw" />
         <ext:Parameter Name="Products" Value="data[1]" Mode="Raw" />
      </ExtraParams>
   </ext:MessageBusDirectEvent>
...
    Finally in the direct event I need to iterate of the list of product Ids that were selected.

    When I grab the extraParameter what else do I need to do to get it back into an Array?

       var products = e.ExtraParameters["Products"];
    I will try to put together a simple example if it will help.
    Last edited by Daniil; Jan 06, 2015 at 12:10 PM. Reason: [CLOSED]
  2. #2
    Jan 06, 2015, 1:06 AM
    Hi Chris,

    Building the list of product ids from the ComboBox that is multiSelect works, but is there a better way?
    Using the getSubmitArray method is OK, but it looks you can simplify the code just using a ComboBox's getValue method. It appears to return an array that you need.

    Am I passing the Array correctly or does it need to be encoded?
    It is OK without encoding.

    When I grab the extraParameter what else do I need to do to get it back into an Array?
    Please use JSON.Deserialize().
    int[] products = JSON.Deserialize<int[]>(e.ExtraParams["Products"]);
    Here I have put all the pieces together.

    Example
    <%@ Page Language="C#" %>

<script runat="server">
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!X.IsAjaxRequest)
        {
            Store store = this.comboBoxProducts.GetStore();
            store.DataSource = new object[] 
            { 
                new object[] { 1, "Item 1" },
                new object[] { 2, "Item 2" },
                new object[] { 3, "Item 3" }
            };
        }
    }

    protected void Finalize(object sender, DirectEventArgs e)
    {
        int[] products = JSON.Deserialize<int[]>(e.ExtraParams["Products"]);

        X.Msg.Alert("Finalize", products.Length).Show();
    }
</script>

<!DOCTYPE html>

<html>
<head runat="server">
    <title>Ext.NET v2 Example</title>

    <script>
        var publish = function () {
            var data = [];

            data[0] = "Comments";
            data[1] = App.comboBoxProducts.getValue();
            Ext.net.Bus.publish('RequestDialog.Finalize', data);
        };
    </script>
</head>
<body>
    <form runat="server">
        <ext:ResourceManager runat="server" />

        <ext:ComboBox
            ID="comboBoxProducts"
            runat="server"
            DisplayField="text"
            ValueField="value"
            MultiSelect="true">
            <Store>
                <ext:Store runat="server">
                    <Model>
                        <ext:Model runat="server">
                            <Fields>
                                <ext:ModelField Name="value" Type="Int" />
                                <ext:ModelField Name="text" />
                            </Fields>
                        </ext:Model>
                    </Model>
                    <Reader>
                        <ext:ArrayReader />
                    </Reader>
                </ext:Store>
            </Store>
        </ext:ComboBox>

        <ext:Button runat="server" Text="Publish">
            <Listeners>
                <Click Fn="publish" />
            </Listeners>
            <MessageBusDirectEvents>
                <ext:MessageBusDirectEvent Name="" OnEvent="Finalize">
                    <ExtraParams>
                        <ext:Parameter Name="Comments" Value="data[0]" Mode="Raw" />
                        <ext:Parameter Name="Products" Value="data[1]" Mode="Raw" />
                    </ExtraParams>
                </ext:MessageBusDirectEvent>
            </MessageBusDirectEvents>
        </ext:Button>
    </form>
</body>
</html>
  3. #3
    Jan 06, 2015, 11:55 AM
    Perfect. Thank you for the example. Please close the thread.

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