ajaxRequest problem

[JC Wu]

In my dnn web site,I have two modules.
moduleA : Client side will call ajaxmanager.ajaxRequest or ajaxmanager.ajaxRequestWithTarget function to refresh some information in server side.
moduleB : There is a RadAjaxPanel.
When moduleA raises an ajaxRequest, at the same time moduleB does some action to trigge RadAjaxPanel.
In this situation, both moduleA and moduleB stop working(server side function cannot complete).
moduleA's Server side event

        protected void RadAjaxManager1_AjaxRequest(object sender, Telerik.Web.UI.AjaxRequestEventArgs e)
        {
            AddMsg(HiddenMsg.Value);
        }

        protected void RadRotator1_Load(object sender, EventArgs e)
        {
            AddMsg(HiddenMsg.Value);
        }

moduleA's javascript

        function SuccessHandler(message) {
            try
            {
                var hidden = document.getElementById("<%=HiddenMsg.ClientID %>");
                hidden.value= message;
                ajaxManager.ajaxRequestWithTarget("<%=RadRotator1.UniqueID %>",'');

                //ajaxManager.ajaxRequest(message);

            }
            catch (e)
            {
            }
        }

[Iana Tsolova]

Hello,

Could you please try sending the both modules code (ascx, cs/vb) so we could try replicating the issue locally based on your scenario and setup?

Looking forward your replies,
Iana
the Telerik team

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[JC Wu]

There is a sample to show this problem.
Situation 1
Setp 1 : Click module1's button
Setp 2 : When module1 is still running,click module2's button
module1's label.Text will not change

Situation 2
Setp 1 : Click module2's button
Setp 2 : When module2 is still running,click module1's button
module2's label.Text will not change

Module1 ascx

<%@ Control Language="C#" AutoEventWireup="true" CodeFile="WebUserControl.ascx.cs" Inherits="DesktopModules_Module1_WebUserControl" %>
<%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %>

<telerik:RadCodeBlock ID="RadCodeBlock1" runat="server">
    <script type="text/javascript">

        var ajaxManager = null;
        var count = 0;

        function RaiseAjax() {
            ajaxManager.ajaxRequest(count);
            count++;
        }

        function pageLoad() {
            if (ajaxManager == null) {
                ajaxManager = $find("<%=RadAjaxManager.GetCurrent(Page).ClientID%>");
            }
        }
    </script>
</telerik:RadCodeBlock>

<asp:Label ID="Label1" runat="server"></asp:Label>
<input id="Button1" type="button" value="button" onclick="RaiseAjax()" /><telerik:RadAjaxLoadingPanel ID="RadAjaxLoadingPanel1" Runat="server"
    Skin="Default">
</telerik:RadAjaxLoadingPanel>

Module1 cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using DotNetNuke.Entities.Modules;
using Telerik.Web.UI;

public partial class DesktopModules_Module1_WebUserControl : PortalModuleBase
{
    protected override void OnInit(EventArgs e)
    {
        if (RadAjaxManager.GetCurrent(this.Page) == null)
        {
            RadAjaxManager radAjaxManager1 = new RadAjaxManager();
            radAjaxManager1.ID = "RadAjaxManager1";
            this.Page.Form.Controls.Add(radAjaxManager1);
        }
        base.OnInit(e);
    }

    protected void Page_Load(object sender, EventArgs e)
    {
        RadAjaxManager manager = RadAjaxManager.GetCurrent(this.Page);
        if (manager != null)
        {
            manager.DefaultLoadingPanelID = RadAjaxLoadingPanel1.ID;
            manager.AjaxRequest += new RadAjaxControl.AjaxRequestDelegate(manager_AjaxRequest);
            manager.AjaxSettings.AddAjaxSetting(manager, Label1);
        }
    }

    void manager_AjaxRequest(object sender, AjaxRequestEventArgs e)
    {
        System.Threading.Thread.Sleep(2000);
        Label1.Text = e.Argument;
    }
}

Module2 ascx

<%@ Control Language="C#" AutoEventWireup="true" CodeFile="WebUserControl.ascx.cs" Inherits="DesktopModules_Module2_WebUserControl" %>
<%@ Register assembly="Telerik.Web.UI" namespace="Telerik.Web.UI" tagprefix="telerik" %>
<telerik:RadAjaxPanel ID="RadAjaxPanel1" runat="server" height="200px"
    HorizontalAlign="NotSet" LoadingPanelID="RadAjaxLoadingPanel1" width="300px">
    <asp:Label ID="Label1" runat="server"></asp:Label>
    <asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Button" />
</telerik:RadAjaxPanel>
<telerik:RadAjaxLoadingPanel ID="RadAjaxLoadingPanel1" Runat="server"
    Skin="Default">
</telerik:RadAjaxLoadingPanel>

Module2 cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using DotNetNuke.Entities.Modules;

public partial class DesktopModules_Module2_WebUserControl : PortalModuleBase
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        System.Threading.Thread.Sleep(3000);
        Label1.Text = DateTime.Now.ToLongTimeString();
    }
}

[rubenhak]

Hi,

I'm having a similar problem. If you make ajaxrequest calls too quickly some of the requests will be missed. for example if you try

ajaxManager.ajaxRequest('a');
ajaxManager.ajaxRequest('b');

you will not receive the ajaxRequest for 'a'. Is there any way to fix it?

Thanks,

Ruben.

[Iana Tsolova]

Hello,

For Ruben's question: To overcome the issue in your case, please try setting the RadAjaxManager RequestQueueSize property as described here.

As it is to the JC Wu scenario: I used the provided code in a sample project and was abe to replicate the described behavior. What happens in the case where you invoke multiple ajax requests, is that only the last one is executed properly and the previously invoked ones are aborted. 
However, if you want to allow the user to invoke multiple ajax requests at a time, I suggest you to use RadAjaxManager in all the modules and set the RequestQueueSize property as described above.


Regards,
Iana
the Telerik team

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[rubenhak]

Hi Iana,

It works.

Thank you,

Ruben.