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Dynamically adding a listener to a panel in code behind

  1. #1
    Feb 12, 2015, 8:51 AM

    Dynamically adding a listener to a panel in code behind

    I'm having trouble trying to dynamically add a listener to a panel that I have just created dynamically. I have used the code below to try to add a listener but I doesn't seem to pick up the event. Any help appreciated.

    Using Ext.NET 3.0.0 


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

<%@ Register assembly="Ext.Net" namespace="Ext.Net" tagprefix="ext" %>

<script runat="server">
    protected void Page_Load(object sender, EventArgs e)
    {
        Ext.Net.Panel panel = new Ext.Net.Panel
        {
            ID = "Panel1",
            Title = "Panel 1",
            Height = 50,
            Width = 200,
            X = 200,
            Y = 200,
            Border = true,
            Draggable = true
        };

        panel.AddTo(winMain);
        panel.Listeners.Move.Handler = "Ext.Msg.alert('Confirm', Ext.String.format('You Clicked {0}', this.id));";
    }
    

</script>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <ext:ResourceManager ID="ResourceManager1" runat="server" />
    <form id="form1" runat="server">

        <ext:Window ID="winMain" runat="server" Width="1000" Height="700" Layout="AbsoluteLayout">

        </ext:Window>

    </form>
</body>
</html>
  2. #2
    Feb 12, 2015, 11:10 AM
    It's possible to overcome the issue by replacing
    panel.AddTo(winMain);
    by
    winMain.Items.Add(panel);
  3. #3
    Feb 12, 2015, 11:25 AM
    Thanks that seems to have done the trick.
  4. #4
    Feb 12, 2015, 11:32 AM
    You're welcome.
  5. #5
    Feb 12, 2015, 12:33 PM
    Strange, if listener is defined before invoking Panel's AddTo it works.

    Let's gonna wait a position from Ext.Net Team.

    <script runat="server">
    protected void Page_Load(object sender, EventArgs e)
    {
        Ext.Net.Panel panel = new Ext.Net.Panel
        {
            ID = "Panel1",
            Title = "Panel 1",
            Height = 50,
            Width = 200,
            X = 200,
            Y = 200,
            Border = true,
            Draggable = true
        };

        panel.Listeners.Move.Handler = "Ext.Msg.alert('Confirm', Ext.String.format('You Clicked {0}', this.id));";
        panel.AddTo(winMain);
    }
</script>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <ext:ResourceManager ID="ResourceManager1" runat="server" />
    <form id="form1" runat="server">
        <ext:Window ID="winMain" runat="server" Width="1000" Height="700" Layout="AbsoluteLayout" />
    </form>
</body>
</html>
  6. #6
    Feb 12, 2015, 12:37 PM
    Hello everybody,

    The AddTo method generates a script when it is called. Therefore it doesn't take into account everything that happens after.

    During an initial page request, please avoid using the AddTo method and similar ones that generate a script. it is supposed to be used during Ext.NET AJAX requests (DirectEvents and DirectMethods).
  7. #7
    Feb 12, 2015, 12:40 PM
    +1 to you Daniil. I tried to search about AddTo method in Ext.Net documentation, but ufortunately there is no information. Thanks for sharing that.
  8. #8
    Feb 13, 2015, 8:05 AM
    Thanks for clarifying. That makes sense.

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