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[CLOSED] Listener fired on Databind

  1. #1
    Mar 11, 2013, 8:33 PM

    [CLOSED] Listener fired on Databind

    I've got a checkbox control with a listener attached. The listener calls a javascript function which causes the control to become immediately disabled. However, I noticed the listener is being activated when the page first loads and the checkbox is being databound.

    What can I do to prevent this from happening?
    Last edited by Baidaly; Mar 12, 2013 at 6:34 PM. Reason: [CLOSED]
  2. #2
    Mar 11, 2013, 10:56 PM
    Hello!

    Can you provide sample of your problem?
  3. #3
    Mar 12, 2013, 3:05 PM
    Quote Originally Posted by Baidaly View Post
    Hello!

    Can you provide sample of your problem?
    Here's the control code for TestControl2.ascx:

    <%@ Control Language="vb" %>

<script type="text/javascript">
    var toggleDCA = function () {
        alert('WTF?!');
    };
</script>

 <script runat="server">    
     
     Public Overrides Sub DataBind()
         DCA.Checked = True
     End Sub
     
     Public Sub Show()
         ActionWindow.Show()
     End Sub
    
 </script>

<ext:Window ID="ActionWindow" runat="server" Hidden="true" Title="Listener Test" Width="700" Height="600" Modal="true" Layout="FitLayout">
    <Items>
        <ext:Panel ID="Panel1" runat="server">
            <Items>
                <ext:Checkbox ID="DCA" runat="server" FieldLabel="Enable">
                    <Listeners>
                        <Check Fn="toggleDCA" />
                    </Listeners>
                </ext:Checkbox>
            </Items>
        </ext:Panel>
    </Items>
</ext:Window>
    Here's the page code for Test2.aspx

    <%@ Page Language="vb" %>

<%@ Register Assembly="Ext.Net" Namespace="Ext.Net" TagPrefix="ext" %>
<%@ Register TagPrefix="uc" TagName="ListenerTest" Src="~/TestControl2.ascx" %> 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
    
    Protected Sub ShowControlButton_Click(sender As Object, e As DirectEventArgs)
        ListenerTest.DataBind()
        ListenerTest.Show()
    End Sub

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

    <ext:ResourceManager runat="server" />


    <ext:Viewport runat="server">
        <Items>
            <ext:Panel ID="MainPanel" runat="server" Layout="FitLayout">
                <TopBar>
                    <ext:Toolbar runat="server">
                        <Items>
                            <ext:Button ID="ShowControlButton" runat="server" Text="Show Control" OnDirectClick="ShowControlButton_Click" />
                        </Items>
                    </ext:Toolbar>
                </TopBar>
                <Content>
                    <uc:ListenerTest ID="ListenerTest" runat="server" />
                </Content>
            </ext:Panel>
        </Items>
    </ext:Viewport>


    </form>
</body>
</html>
  4. #4
    Mar 12, 2013, 5:32 PM
    Hi,

    Setting up the Checked property during a DirectEvent causes generating this script.
    checkbox.setValue(true);
    It causes the Checked event to be fired.

    To avoid the event you can use a pair of the SuspendEvents and ResumeEvents methods.
    Public Overrides Sub DataBind()
     DCA.SuspendEvents(False)
     DCA.Checked = True
     DCA.ResumeEvents()
End Sub
  5. #5
    Mar 12, 2013, 5:55 PM
    Quote Originally Posted by Daniil View Post
    Hi,

    Setting up the Checked property during a DirectEvent causes generating this script.
    checkbox.setValue(true);
    It causes the Checked event to be fired.

    To avoid the event you can use a pair of the SuspendEvents and ResumeEvents methods.
    Public Overrides Sub DataBind()
     DCA.SuspendEvents(False)
     DCA.Checked = True
     DCA.ResumeEvents()
End Sub
    That worked. Thanks.

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