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Stop a task from server-side.

  1. #1
    Jul 06, 2012, 5:10 AM

    Stop a task from server-side.

    Hi, I extended ProgressBar with a TaskManager,
    //FPPProgress.cs
public void Stop()
{
    taskManager.StopTask(task.TaskID);
    //ResourceManager.AddScript("{0}.stopTask('{1}');", this.taskManager.ClientID, task.TaskID);
}

protected override void CreateChildControls()
{
    this.Controls.Clear();
    base.CreateChildControls();

    task = new Task();
    task.TaskID = "ProgressBarTask";
    task.Interval = 1000;
    task.DirectEvents.Update.Event += new ComponentDirectEvent.DirectEventHandler(OnTick);
    
    taskManager = new TaskManager
    {
        ID = "ProgressTaskManager"
    };
    taskManager.Tasks.Add(task);
    this.Controls.Add(taskManager);
}
    And then, Creat a window with FppProgressBar Dynamiclly.
    //WebForm.aspx
protected void Button1_DirectClick(object sender, Ext.Net.DirectEventArgs e)
{
    ThreadPool.QueueUserWorkItem(LongAction);
    var win = CreatePostDynamicControl("ProgressWindow", "form1", -1,x=> createProgressWindow()) as Window;

    win.Render(this.Form);
}

private Control createProgressWindow()
{
    var win = new Window()
    {
        ID = "ProgressWindow",
        Title = "请稍候",
        Width = System.Web.UI.WebControls.Unit.Pixel(400),
        Height = System.Web.UI.WebControls.Unit.Pixel(300),
        Collapsible = false,
        Maximizable = false,
        Modal = true
    };
    FPPProgressBar progressBar = new FPPProgressBar();
    progressBar.Interval = 1000;
    progressBar.ID = "ProgressBar";
    progressBar.AutoRun = true;
    progressBar.Tick += new FPPProgressBar.TickHandler(progressBar_Tick);
    win.Items.Add(progressBar);
    return win;
}
    But Stop() do not work, the client-side error is "Cannot call method 'stopTask' of undefined";
    //FPPProgress.cs
public void Stop()
{
    taskManager.StopTask(task.TaskID);
    //ResourceManager.AddScript("{0}.stopTask('{1}');", this.taskManager.ClientID, task.TaskID);
}
    Last edited by Daniil; Jul 06, 2012 at 4:47 PM. Reason: Please use [CODE] tags
  2. #2
    Jul 06, 2012, 4:54 PM
    Hi,

    Welcome to Ext.NET!

    Does this work?
    ResourceManager.AddScript("{0}.stopTask('{1}');", this.taskManager.ClientID, task.TaskID);
    I am unable to reproduce the problem with a simple example.

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

<%@ Register Assembly="Ext.Net" Namespace="Ext.Net" TagPrefix="ext" %>

<script runat="server">
    protected void Stop(object sender, DirectEventArgs e)
    {
        this.TaskManager1.StopTask("Task1");
    }
</script>

<!DOCTYPE>

<html>
<head runat="server">
    <title>Ext.NET v2 Example</title>
</head>
<body>
    <ext:ResourceManager runat="server" />

    <ext:Button runat="server" Text="Stop" OnDirectClick="Stop" />

    <ext:TaskManager ID="TaskManager1" runat="server">
        <Tasks>
            <ext:Task TaskID="Task1">
                <Listeners>
                    <Update Handler="App.Label1.appendLine('You are the best!');" />
                </Listeners>
            </ext:Task>
        </Tasks>
    </ext:TaskManager>

    <ext:Label ID="Label1" runat="server" />
</body>
</html>
    Could you provide a full test case to copy, paste and run?
  3. #3
    Jul 06, 2012, 11:34 PM

    Thank you.

    Thank you, it doesn`t.
    If I do it this way, creat a TaskManager in a DirectEvent
    protected void Button1_DirectClick(object sender, Ext.Net.DirectEventArgs e)
{
    Task task = new Task { 
        TaskID="Hello"
    };
    TaskManager taskManager=new TaskManager();
    taskManager.ID = "Progress";
    taskManager.ItemID = "Progress";
    taskManager.Tasks.Add(task);
    taskManager.Render(this.Form);
}
    the response is 
    {
    script: "Ext.net.ResourceMgr.destroyCmp(\"App.Progress\");Ext.create(\"Ext.net.TaskManager\",{proxyId:\"Progress\",itemId:\"Progress\"});"
}
    How can I get the reference to the Ext.net.TaskManager? The Ext.net assembly I used is "Ext.NET Pro","2.0.0.18341"
    Last edited by Daniil; Jul 12, 2012 at 1:10 PM. Reason: Please use [CODE] tags
  4. #4
    Jul 12, 2012, 1:16 PM
    Ok, you create a TaskManager during DirectEvent. But do you recreate it during another request to get its ClientID? It is not recreated automatically.

    It would be best to provide us with a full sample to reproduce the problem.
  5. #5
    Jul 13, 2012, 12:48 AM
    Last edited by WiseJiong; Jul 13, 2012 at 1:13 AM.
  6. #6
    Jul 13, 2012, 8:15 AM
    Confirm, there is a problem. A dynamically rendered TaskManager doesn't register its id to be accessed.

    We will investigate.

    For now I can suggest the following fix. Add this into the page <head>.

    Fix
    <script type="text/javascript">
    Ext.net.TaskManager.override({
        constructor : function () {
            Ext.net.TaskManager.superclass.constructor.apply(this, arguments);
            Ext.net.ComponentManager.registerId(this);
            this.initManager();
        }
    });
</script>
    After that you will be able to access a TaskManager in a common way:
    Namespace.TaskManagerID
    The default Namespace is "App".
  7. #7
    Jul 13, 2012, 8:27 AM
    Thank you.
  8. #8
    Jul 31, 2012, 1:14 PM
    The bug has been fixed in SVN. It will be publicly available with the next 2.1 release.

    Thanks again for the report.

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