Hi,

This question is related to the v1.x thread.
I've slightly modified the example code to call the Ext.TaskManager utility function in order to stop all running tasks. The call still doesn't seem to work in v4.x. Please advise if my usage pattern is correct.

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

<script runat="server">
    protected void RefreshTime(object sender, DirectEventArgs e)
    {
        this.ServerTimeLabel.Text = DateTime.Now.ToString("HH:mm:ss");
    }
</script>

<!DOCTYPE html>

<html>
<head runat="server">
    <title>TaskManager with Client and Server Side Events - Ext.NET Examples</title>
    <link href="/resources/css/examples.css" rel="stylesheet" />
    <script type="text/javascript">
        var onStopAll = function () {
            this.disable();
            /*App.TaskManager1}.stopAll();*/
            Ext.TaskManager.stopAll();
            App.btnStartAll.enable();
        };
    </script>
</head>
<body>
    <form runat="server">
        <ext:ResourceManager runat="server">
            <Listeners>
                <DocumentReady Handler="window.msg = function (text) {
                    #{LogArea}.setValue(
                        Ext.String.format('{0}\n{1} : {2}',
                        #{LogArea}.getValue(),
                        text,
                        Ext.Date.format(new Date(), 'H:i:s')));
                    };" />
            </Listeners>
        </ext:ResourceManager>

        <ext:Viewport runat="server" Layout="BorderLayout">
            <Items>
                <ext:Panel
                    runat="server"
                    Region="Center"
                    Title="TaskManager example"
                    Icon="Time"
                    Border="false">
                    <TopBar>
                        <ext:Toolbar runat="server">
                            <Items>
                                <ext:Button
                                    ID="btnStartAll"
                                    runat="server"
                                    Text="Start All Tasks"
                                    Icon="ControlPlayBlue"
                                    Disabled="true">
                                    <Listeners>
                                        <Click Handler="this.disable();#{TaskManager1}.startAll();#{btnStopAll}.enable()" />
                                    </Listeners>
                                </ext:Button>
                                <ext:Button
                                    ID="btnStopAll"
                                    runat="server"
                                    Text="Stop All Tasks"
                                    Icon="ControlStopBlue">
                                    <Listeners>
                                        <Click Fn="onStopAll" />
                                    </Listeners>
                                </ext:Button>
                            </Items>
                        </ext:Toolbar>
                    </TopBar>
                    <LayoutConfig>
                        <ext:HBoxLayoutConfig Align="Stretch" />
                    </LayoutConfig>
                    <Items>
                        <ext:Panel
                            runat="server"
                            Title="Local time"
                            BodyStyle="text-align:center;"
                            BodyPadding="20"
                            Flex="1">
                            <LayoutConfig>
                                <ext:VBoxLayoutConfig Pack="Center" Align="Center" />
                            </LayoutConfig>
                            <Items>
                                <ext:Label ID="LocalTimeLabel" runat="server" StyleSpec="font-weight:bold;font-size:500%;" Width="280" Height="50" />
                            </Items>
                            <BottomBar>
                                <ext:Toolbar runat="server">
                                    <Items>
                                        <ext:Button ID="StartLocalTime" runat="server" Text="Start Task">
                                            <Listeners>
                                                <Click Handler="#{TaskManager1}.startTask(0);" />
                                            </Listeners>
                                        </ext:Button>
                                        <ext:Button ID="StopLocalTime" runat="server" Text="Stop Task">
                                            <Listeners>
                                                <Click Handler="#{TaskManager1}.stopTask(0);" />
                                            </Listeners>
                                        </ext:Button>
                                    </Items>
                                </ext:Toolbar>
                            </BottomBar>
                        </ext:Panel>
                        <ext:Panel
                            ID="ServerTimeContainer"
                            runat="server"
                            Title="Server Time (update every 5 seconds)"
                            BodyStyle="text-align:center;"
                            BodyPadding="20"
                            Flex="1">
                            <LayoutConfig>
                                <ext:VBoxLayoutConfig Pack="Center" Align="Center" />
                            </LayoutConfig>
                            <Items>
                                <ext:Label ID="ServerTimeLabel" runat="server" StyleSpec="font-weight:bold;font-size:500%;" Width="280" Height="50" />
                            </Items>
                            <BottomBar>
                                <ext:Toolbar runat="server">
                                    <Items>
                                        <ext:Button ID="StartServerTime" runat="server" Text="Start Task">
                                            <Listeners>
                                                <Click Handler="#{TaskManager1}.startTask('servertime');" />
                                            </Listeners>
                                        </ext:Button>
                                        <ext:Button ID="StopServerTime" runat="server" Text="Stop Task">
                                            <Listeners>
                                                <Click Handler="#{TaskManager1}.stopTask('servertime');" />
                                            </Listeners>
                                        </ext:Button>
                                    </Items>
                                </ext:Toolbar>
                            </BottomBar>
                        </ext:Panel>
                    </Items>
                </ext:Panel>
                <ext:Panel
                    runat="server"
                    Region="South"
                    Height="200"
                    Border="false"
                    Layout="Fit">
                    <Items>
                        <ext:TextArea ID="LogArea" runat="server" />
                    </Items>
                </ext:Panel>
            </Items>
        </ext:Viewport>

        <ext:TaskManager ID="TaskManager1" runat="server">
            <Tasks>
                <ext:Task
                    OnStart="
                        #{StartLocalTime}.setDisabled(true);
                        #{StopLocalTime}.setDisabled(false);
                        msg('Start Client');"
                    OnStop="
                        #{StartLocalTime}.setDisabled(false);
                        #{StopLocalTime}.setDisabled(true);
                        msg('Stop Client');">
                    <Listeners>
                        <Update Handler="#{LocalTimeLabel}.setText(Ext.Date.format(new Date(), 'H:i:s'));" />
                    </Listeners>
                </ext:Task>

                <ext:Task
                    TaskID="servertime"
                    Interval="5000"
                    OnStart="
                        #{StartServerTime}.setDisabled(true);
                        #{StopServerTime}.setDisabled(false);
                        msg('Start Server')"
                    OnStop="
                        #{StartServerTime}.setDisabled(false);
                        #{StopServerTime}.setDisabled(true);
                        msg('Stop Server')">
                    <DirectEvents>
                        <Update OnEvent="RefreshTime">
                            <EventMask
                                ShowMask="true"
                                Target="CustomTarget"
                                CustomTarget="={#{ServerTimeContainer}.body}"
                                MinDelay="350" />
                        </Update>
                    </DirectEvents>
                </ext:Task>
            </Tasks>
        </ext:TaskManager>
    </form>
</body>
</html>