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[FIXED] [#1573] [4.6.0] RemoveAll() causes a Javascript Error on subsequent calls

  1. #1

    [FIXED] [#1573] [4.6.0] 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="http://www.w3.org/1999/xhtml"><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>
    
        </form></body></html>
    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)
                {
                    this.MenuDynItems.RemoveAll();
    
    
                    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);
                        this.MenuDynItems.Items.Add(mi);
                        mi.Render();
                    }
    
    
    
    
                    this.WinTest.Show();
                }
    
    
    
    
               
            }
        }
    Last edited by fabricio.murta; Jun 15, 2018 at 7:55 PM.
  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
  3. #3
    Hello again!

    The issue has just been fixed and will be available next Ext.NET public release.

    The fix is immediately available for premium subscription users who build Ext.NET from sources to their application.

    Thanks again for reporting the issue!
    Fabrício Murta
    Developer & Support Expert

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