PageMethods is Undefined

HI,

its Urgent

I am Getting Same Error Could u please Help me Out..

Here is My Code..

using System.Web.UI.HtmlControls;

using System.Web.Services;

using Microsoft.Web.Script.Services;

using Microsoft.Web.Script;

[WebMethod]publicvoid GetNewMessage()

{

string str ="Hello";

Response.Write(str);

}

Javascript

PageMethods.GetNewMessage();

<asp:ScriptManagerID="ScriptManager1"runat="server"EnablePartialRendering="true">

<Scripts>

<asp:ScriptReferencepath="scripts.js"/>

</Scripts>

</asp:ScriptManager>

Thanks in Advance,

Suman...

Please its Urgent...

this is not sufficient to debug your error ... you need to show us the whole thing ... and what kind of error is that? JavaScript or server error?

check this post out ... same error as yours:http://forums.asp.net/t/993893.aspx

ScriptManager has to have EnablePageMethods=true and the WebMethod has to be static.

hi here is my full code..

aspx file

<bodystyle="margin: 0px;padding: 0px;">

<formrunat="server"action="RF_Message.aspx">

<divid="ContentPanel">

<divid="MessageList">

<asp:ScriptManagerID="ScriptManager1"runat="server"EnablePartialRendering="true"EnablePageMethods="true"EnableScriptGlobalization="true"EnableScriptLocalization="true">

<%--<Scripts>

<asp:ScriptReference Path="scripts.js" />

</Scripts>--%>

</asp:ScriptManager>

</div>

</div>

</form>

</body>

</html>

<scriptlanguage="javascript"type="text/javascript">

var str = PageMethods.GetNewMessage();

alert(str);

var result = document.createElement("div");var divlist = el("MessageList");

result.innerHTML = str;

divlist.appendChild(result);

function el(id)

{

return document.getElementById(id);

}

</script>

aspx.cs file..

using System;

using System.Data;

using System.Configuration;

using System.Collections;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

using System.Web.Services;

using System.Web.Script.Services;

using System.Web.Script;

publicpartialclassRF_Message : System.Web.UI.Page

{

//ChatManger Chatmanger = ChatManger.GetChatManager();

protectedvoid Page_Load(object sender,EventArgs e)

{

}

}

#region Script callback function

[System.Web.Services.WebMethod]

publicstaticstring GetNewMessage()

{

string str ="Hello";

return str;

}

#endregion

}

I am Getting Javascript Error While Running...

i am Getting alert Undefined...

RIght, you're executing that embedded script block as the page gets to it; pagemethods haven't been created yet (that happens during the clientside init, iirc. Try pulling all that code into your pageLoad() javascript function and see if that doens't help.

PageMethods quirk

So here's what I found while using PageMethods in Beta 2

A server side method needs the attribute [System.Web.Services.WebMethod]A server side method should be static or else you'll get a PageMethods is undefined errorA server side method should NOT be defined in code behind but should be in the ASPX page in <script runat="server"> tag.Here's the quirk. A server side method CANNOT have two parameters with names that differ only in the case of their letters. eg. someParam and SomeParam, even if they are of different types, e.g. string and int This will result in a Sys.ArgumentTypeException with the message Object of type Number cannot be converted to type Function. Parameter name OnSuccess.

<script runat="server"> [System.Web.Services.WebMethod] public static string SomeMethod(string someParam, int SomeParam) { return "Hello " + someParam + " you are " + SomeParam.ToString() + " years old"; } </script>

<script type="text/javascript" language="javascript"> function CallMethod() { var age = 28; PageMethods.SomeMethod('MyName',age, OnCallResponse); } function OnCallResponse(arg) { alert(arg); } </script>

Change the SomeParam to age and it will work.

So my question is : Is this a bug, quirk or by design? If a bug or quirk will it be fixed? Sure one NEVER names two parameters the same with just a change in the case but then again, NEVER say NEVER.

Thanks

I SO MUCH SUPPORT your finding #3. It's so stupid that the server side code won't work in code-behind but inline code would work. What the heck?

To any MSFT moderator:

Is there any workaround for #3? This is driving me crazy.

Weird, but I just tried to create a page just like yours and it works even if the static method is in the code behind...

This is the class:

public partialclass _Default : System.Web.UI.Page { [WebMethod]public static string GetServerDate() {return DateTime.Now.ToString(); }}

And this is the ASPX:

<%@. Page Language="C#" AutoEventWireup="true" CodeFile="~/Default.aspx.cs" Inherits="_Default" %><%@. Importnamespace="System.Web.Services"%>"-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"><html xmlns="http://www.w3.org/1999/xhtml">Untitled Page"server"> "form1" runat="server" method="post"> "ScriptManager1" runat="server" />
 "button"value="get date" onclick="GetDate();" id="Button1" />
"date" />
 "text/javascript">function GetDate(){ var div = document.getElementById("date"); PageMethods.GetServerDate(function (result) { div.innerText = result; });}

Sorry about my last post which is unreadable...

Reposted:

Weird, but I just tried to create a page just like yours and it works even if the static method is in the code behind...

This is the class:

public partialclass _Default : System.Web.UI.Page
{
 [WebMethod]
public static string GetServerDate()
 {
return DateTime.Now.ToString();
 }
}

And this is the ASPX:

<%@. Page Language="C#" AutoEventWireup="true" CodeFile="~/Default.aspx.cs" Inherits="_Default" %><%@. Import namespace="System.Web.Services"%><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head runat="server"> <title>Untitled Page</title></head><body> <form id="form1" runat="server" method="post"> <asp:ScriptManager ID="ScriptManager1" runat="server" /> <div> <input type="button" value="get date" onclick="GetDate();" id="Button1" /> <div id="date" /> </div> </form> </body></html><script type="text/javascript">function GetDate(){ var div = document.getElementById("date"); PageMethods.GetServerDate(function (result) { div.innerText = result; });}</script>

This looks a bug, thanks for reporting this issue, and it will be fixed in a future build.
-Hao

Hi,

that is not a bug. Remember that vbscript is case unsensitive.

Hi,

I tried the approach of using static methods for PageMethods in AJAX v1.0 Beta 2, but it is not working. The only change that happened is that the error message has changed from "PageMethods is undefined" to "PageMethods is null or not a object.

PLEASE HELP !!!!

Advance,

Where the heck is "vbscript" in whole picture? We are trying to access a WebMethod from Javascript using MS Ajax Beta 2 in the code-behind file.

I was hoping this would have been corrected in Beta 2. I guess I'll keep using the ATLAS CTP until this is resolved. Oh well, maybe in build 3??

hello.,

this is correct. the problem is related with the EnsureParameters of the WebServiceMethodData class. I don't know why, but it's "eating parameters" when they have the same name and differ only in case. here's the "bad" code:

privatevoidEnsureParameters()
{
if (this._parameterData ==null)
 {
lock (this)
 {
Dictionary<string,WebServiceParameterData>dictionary1 =newDictionary<string,WebServiceParameterData>(StringComparer.OrdinalIgnoreCase);
intnum1 =0;
foreach (ParameterInfoinfo1inthis._methodInfo.GetParameters())
 {
dictionary1[info1.Name] =newWebServiceParameterData(info1,num1);
num1++;
 }
this._parameterData =dictionary1;
 }
 }
}

I've tried reproducing this with a simple method and i get the 2 parameters and if i add them to a dictionary, i get 2 entries. this is not happening here (yes, i've used reeflection to reproduce what's going on and i can say that the dic only has one parameter.

if anyone have an idea on why is that, please,share with us!

thanks. 

hi.

dom't you hate it when you spend 1 hour looking at code and writing reflection just to see that the damn thing is right in front of you?:

newDictionary<string,WebServiceParameterData>(StringComparer.OrdinalIgnoreCase);

thanks Garbin!

Yeah, there are two places in the code that are using OrdinalIgnoreCase comparers which is what's causing the problem, removing the IgnoreCase for both dictionaries fixes the problem.

Hope that helps,
-Hao

hello.

does that mena that it'll be removed in the next release?

Yes I've already fixed it in the codebase.

Hope that helps,
-Hao

Parallel Asynchronous Calls to Webservice

I'm working on a dashboard / portal system that makes use of asp.net ajax to populate the contents of the dashboard objects (dashlets, or portlets). In my javascript page load event handler, I make an asynchronous call to a web service, specifically a webmethod which returns the HTML/XML necessary to render the contents of the dashlet.

What I have is effectively the following (in pseudocode for simplicity):

on page load {
dashlet1 = service.renderFunction(dashletId1, ... );
dashlet2 = service.renderFunction(dashletId2, ... );
dashlet3 = service.renderFunction(dashletId3, ... );
...
}

However, while the page does render in an asynchronous fashion, these calls are made in sequence, so the dashlets are populated in sequence, rather than in parallel.

Is there a way to have these calls made concurrently, such that each dashlet isn't effectively waiting on the previous dashlet to have been rendered before making its own asynchronous call to the webservice? Will I have to resort to threading?

Thanks in advance for any guidance.

The problem is that browsers will only fire off two asynchronous calls at any given time. There is a good article written by the PageFlakes guy on CodeProject that detailed this issue and good design for asynchronous client-side calls:

http://www.codeproject.com/Ajax/aspnetajaxtips.asp

Hope this helps!

That's great to know - I'll read up on this article.

Thanks for the link!

have you ever been able to find a solutions for this issue? I'm facing same problem, and the artcile did not seem to help, I have only two requests, and still the first request blocks the second request completly.

Tamer

I worked around it using the CNAME hack. See more here:

http://ajaxian.com/archives/using-cnames-to-get-around-browser-connection-limits

There is no "solution" to the problem, it's an inherent limitation of current gen browsers. It's strange that you have two requests and one is being blocked. Are you sure there isn't a third call in progress?

Parser Error Message: The entry ScriptModule has already been added.

On my development system everything is running fine, when i publish to my beta server (SBS 2003 - *no* VS installed) I get the following error:

Parser Error Message: The entry 'ScriptModule' has already been added.

Removing this line resolves the issue but then presents me with various errors relating to not being able to load System.Web.Extensions... If i can understand why the first issue is occuring this would help! Any clues?

Hi,

I have exactly the same happening on my server, does anyone have a fix for this ?

Thanks
James

This can happen if there are two HttpModules named "ScriptModule". This can mysteriously happen if you are running a virtual directory under an asp application that already has the module defined. You can either remove the HttpModule declaration<add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/> from the VD web.config, or all a remove node

<remove name="ScriptModule" />

just before adding it back.

Hi,

Excellent, thanks for the heads up.

James

That was an excellent post. Thank you for your help !

Sam

This suggest is not working for me again and again the same error only i am getting is there any other solution

please let me know soon......