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[OPEN] [#1573] [4.5.1] RemoveAll() causes a Javascript Error on subsequent calls

  1. #1

    [OPEN] [#1573] [4.5.1] RemoveAll() causes a Javascript Error on subsequent calls

    I ran into a interesting bug while creating a dynamic menu in a split button on a directevent. The first time through it worked. Subsequent calls created a javascript error.

    Here is the error:
    ext.axd?v=4.5.1:20 Uncaught TypeError: Cannot read property 'destroy' of null
        at ctor.doRemove (ext.axd?v=4.5.1:20)
        at ctor.remove (ext.axd?v=4.5.1:20)
        at ctor.remove (ext.axd?v=4.5.1:20)
        at ctor.removeAll (ext.axd?v=4.5.1:20)
        at eval (eval at executeScriptDelay (ext.axd?v=4.5.1:249), <anonymous>:1:18)
        at eval (<anonymous>)
        at ctor.executeScriptDelay (ext.axd?v=4.5.1:249)
        at ctor.executeScript (ext.axd?v=4.5.1:249)
        at ctor.requestSuccessHandler (ext.axd?v=4.5.1:242)
        at Object.callback (ext.axd?v=4.5.1:20)
    You can reproduce this issue very simply in this hello world test. Here is a very simple test aspx page.
    <html xmlns=""><head>
    <script type="text/javascript">
    </script></head><body>    <form id="form1" runat="server">                 <ext:ResourceManager runat="server" ID="rm1" ShowWarningOnAjaxFailure="true" Theme="Triton" >        </ext:ResourceManager>
            <ext:Button runat="server" Text="Launch Window">            <DirectEvents>                <Click OnEvent="Unnamed_Event" />            </DirectEvents>        </ext:Button>                 <ext:Window ID="WinTest" runat="server" Hidden="true" CloseAction="Hide" Title="Testing Dynamically Added Items" Height="200" Width="300">            <Items>                <ext:SplitButton runat="server" ID="ButtonTest" Text="Dynamic Added Items">                    <Menu>                        <ext:Menu ID="MenuDynItems"  runat="server">
                            </ext:Menu>                    </Menu>                </ext:SplitButton>            </Items>        </ext:Window>
    Click on on the button to launch the window works 1x. On subsequent calls a javascript error is thrown.
        public partial class test : System.Web.UI.Page
            protected void Page_Load(object sender, EventArgs e)
                if (!IsPostBack)
            protected void Unnamed_Event(object sender, DirectEventArgs e)
                if (X.IsAjaxRequest)
                    for (int i = 1; i < 5; i++)
                        var mi = new Ext.Net.MenuItem() { ID = "dynExt-00" + i, Text = "Item 00" + i, IDMode = IDMode.Static };
                        mi.Listeners.Click.Handler = string.Format("alert('{0}')", mi.Text);
  2. #2
    Hello @Juls! Thank you for the report!

    We've logged the issue under #1573 and will update here as soon as we get it fixed in Ext.NET.

    As a quick workaround, you can:

    this.MenuDynItems.RemoveAll(true); // or false
    I hope this helps!
    Fabrício Murta
    Developer & Support Expert

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