AJAX :: Using JavaScript And WebService?
Mar 10, 2010
I am planning to use a Javascript call to a WebService to retrieve data from the database. At the moment I am using Ajax to do this. But since the Ajax is slowing down the performance of my application. I have read in some article that even though Ajax only refreshes the Update panel contents, Ajax does a full round trip to the server. What I need to know is how can I populate a Grid from data coming from a WebService via a Javascript call.
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Similar Messages:
Jul 21, 2010
After watching [URL] learning guide in accessing Web Service from JavaScript[/url] I was doing the same thing in order to test it. And found out that in my JavaScript I don't have any WebService in my IntelliSense. Such thing happens if I create WebService and WebSite either in one common solution or in the different.
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Jan 28, 2011
I'm calling a webservice using jQuery with .ajaxHere are the data parameters for the call:
var parameters = "{'Titre':'" + Titre + "','Description':'" + Description + "','Contact':'" + Contact + "','VilleId':'" + VilleId + "','QuartierId':'" + QuartierId + "','UserId':'" + UserId + "'}";
It works fine. But when parameters Description or Titre contain the ' character , no call!!!
Does anyone have an idea how can i make it work even with apostrophe character in Titre and/or Description?
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Apr 23, 2010
I'm trying to pass a javascript object array back to a vb .asmx web service.
I can't even tell you how many different things I've tried, so i'm confused more than when I started.
Below is an example of the client side code I am using.
[Code]....
I'm adding my script reference in my vb page as follows, and can access other web methods fine.
[Code]....
how to be able to access these objects within the web service method. I need to be able to iterate though all the people from the javascripts array so that I can do some other functions, such as validation, adding them to a database, etc.
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Oct 5, 2010
I've tried a bunch of different examples and still can't get this to work. I have a jQuery GalleryView control I'm using and I simply want to log impressions. I set up a webservice that works, but I can't figure out how to get it to work in javascript. I have verified that the webservice is working as expected.
Imports System.Web
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Aug 31, 2010
I know i've seen a tutorial for this, but can't locate it anymore. I have a class Employee in c# side, I also have a webservice where I pass in an ID# and an Employee object is returned. Now I want this object returned to Javascript code, I know I've seen it done before, can someone point me to a tutorial that shows something like this being done. I'm using the MicrosoftAjax.js file.
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Mar 23, 2011
I have a page that calls a webservice from JavaScript using the approach described in this article: [URL]
This is working fine. The problem is when the page causes a postback before the end of the execution of the webservice's method. When that happens, the succeeded callback method never gets called. Does anyone know if there's a workaround to this?
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Mar 10, 2010
I am trying to call a webservice method fom javascript.Every thing goes fine. But,problem is that, I can't return any value from the function.
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May 12, 2010
I'm calling a web service called GetTooltip from inside Javascript. However, since the web service is called asynchronously, it doesn't wait until I get the return value from the web service, before it continues again. This is a bit of a problem for me, since the web service is in a for-loop. How do I make the Javascript wait until I hear back from the web service, before letting Javascript continue the for-loop?
[code]....
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May 13, 2010
Configuration : Windows Vista,VS 2005,Ajax v1.0.61025 My Html Page
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Untitled Page</title>
<script language="javascript" type="text/javascript">
function fnCall()
{
try
{
var ans= Sim.Service.HelloWorld(OnMethodSucceeded, OnMethodFailed);
}
catch(e)
{
alert(e.message);
}
}
function OnMethodSucceeded(result)
{
alert('a');
}
function OnMethodFailed(result)
{
alert('b');
}
</script>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server" ><Services>
<asp:ServiceReference Path="http://localhost/ajaxtest/service.asmx" /></Services>
</asp:ScriptManager>
<div><input id="Button1" type="button" value="button" onclick="fnCall();" /></div>
</form>
</body>
</html>
Web Service CS.
using System;
using System.Web;
using System.Web.Services;
using System.Web.Services.Protocols;
using System.Web.Script.Services;
namespace Sim
{
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[System.ComponentModel.ToolboxItem(false)]
// To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line.
[System.Web.Script.Services.ScriptService]
public class Service : System.Web.Services.WebService
{
public Service()
{
//Uncomment the following line if using designed components
//InitializeComponent();
}
[WebMethod,ScriptMethod(UseHttpGet=true)]
public string HelloWorld()
{
return "Hello World";
}
}
}
But i am getting Sim is not defined. Error. post ur comments. I have reviewed most of the forums. I am not able to clear
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May 29, 2010
I just wana know that can I bind an asp listview via javascripts by calling a webservice in c#??
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Jan 27, 2012
I wanted to use using database to populated the dropdownbut i am getting error as type or list space cannot be foundat ListCountry GetCountriesas its defined staticthe web methood code is in the same aspx.cs pagehow culd i use it if a different webmethod page .asmx is created
ref : [URL]
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Mar 2, 2010
I am calling a web service via Javascript. I tried it first in a web page that does not have a Masterpage and it worked perfectly. Then I moved everything over to a web page that does use a Masterpage, and I get a "Microsoft JScript runtime error: Object required" on the javascript statement that calls the web service. My javascript statements look like so:
[Code]....
The web service looks like:
[Code]....
The page source is:
[Code]....
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Apr 20, 2010
I get this error "The server method xxx timed out." calling a WebService that internally does a hard query to the database, and takes some time. I use this method to change the webservice timeout, but it does not seems to do anything (the timeout errors appears in less than a second).
MyService.set_timeout(100000);
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Jan 8, 2011
I have a web user control. That I load dynamicaly inside a modalpopup window using dynamic populate extender. User control has a external javascript file linked to it. Problem: I cannot make call to webservice method from this external javascript file. When I make a call -- servicename.methodname() I get servicename not defined error.
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Feb 26, 2010
I want to add items to a dropdownlist with values return by a webservice which will be called from javascript without cascading extender...
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Nov 23, 2010
Pinging back to a webservice in ajax from the client keeps the user's session alive, I don't want this to happen. More extensive summary For a website we're developing, we need the client to ping back (in js) to a webservice (ASMX) on the server (IIS7.5). This happens to let the server know that the user is still on the site, and hasn't browsed away to another site. This is as our customer wants to let users lock records, but if they browse away to other sites, then let other people take over those locked records. Perhaps the distinction between the client being on the site but inactive and on another site seems unimportant, but that's kinda irrelevant, I don't get to write the UI spec, I just have to make it work.
My problem is this, the ping stops the user from being timed out on the server through the standard forms authentication timeout mechanism. Not surprising as there is that 30 second ping in the background keeping the session alive. Even though we want to know if the user is still on the site, we want the normal forms authentication timeout mechanism to be honoured. I thought I might be able to fix this by removing the ASP.NET_SessionId and .ASPXAUTH cookies in the XMLHttpRequest that is the server ping, but I can't figure out how to do this. This is how my web service & method are defined:
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[ScriptService]
public class PingWS : WebService
{
[WebMethod]
public void SessionActive(string sessionID)
{
// does stuff here
}
This is how I'm calling it in js (request is over HTTPS, :
$.ajax({
type: "POST",
url: "PingWS.asmx/SessionActive",
data: 'sessionID=' + aspSessionID + '}',
beforeSend: function (xhr) {
xhr.setRequestHeader('Cookie', '');
xhr.setRequestHeader('Cookie', 'ASP.NET_SessionId=aaa; .ASPXAUTH=bbb;');
},
dataType: "json"
});
I was trying with the setRequestHeader, but that just appends to the header rather than overwrites the header, and IIS is happy to ignore that junk I added. I'm thinking maybe I should be trying to do this at the server end, someone take PingWS.asmx out of the loop so that it doesn't keep the session active, but I'm not sure how to do this. Although the title of the question is focused on clearing the cookie in the header, I'd be super happy if anyone points out that I'm being really stupid and there is actually a much better way of trying to do what I'm doing.
I'm thinking at this stage maybe I need to add something to the webmethod that says how long this particular page has been inactive, and use that knowledge to timeout manually. That actually sounds pretty easy, so I think I'll do that for now. I'm still convinced that there must be an easy way to do what I originally wanted to do though. Update I'm thinking I'm pretty screwed in terms of cookie manipulation here as both the .ASPXAUTH and ASP.NETSessionId cookie are HttpOnly, which means the browser takes them out of your hands, you can't access them via the document.cookies object. So I would say that leaves me with:
Updating my SessionAlive webmethod to track each request so I can tell how long the user has been sitting idle on a page and timeout if needs be Marking the .asmx page somehow on the server end so that it's taken out of the normal authentication/session tracking flow I know how to do 1. so I'll start there but 2. seems much cleaner to me.
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Apr 11, 2010
I created a very simple webService using the VS2008 template. i am planning to use Ajax call for the webService.when i try to open my webservice in IE browser using following link to see the Javascript proxy, it return blank page.[URL]
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Mar 9, 2010
I'm working with the MicrosoftAjax.js libraries to make my webservice calls via javascript, right now all my services are returning basic types, like string, int, bool. can i also have my services return things like DataSets, DataTables, or custom Classes that I have built to my javascript side?
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Aug 16, 2010
I was created webservice which has a Method:
[Code]....
Then, in my aspx page, i call that method in javascript, but i get a Exception message is "Authentication Failed", code below:
[Code]....
How to resolve this problem?
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Jun 30, 2010
The jqGrid has been kicking my butt (as well as others on this site). I can't seem to get the JSON data from the webservice to load into the jqGrid when using the addJSONData method.
I am not using MVC just a plain WebProject webservice in ASP.NET 3.5.
I am using the latest version of jqGrid 3.5.
I don't know what to do. I am currently trying to load just 1 row that I am returning a string in my WS like this:
"Page:1,Total:1,Records:1,Rows:[name: Jeff V title: Programmer]"
Which is then passed into my javascript as:
{"d":"Page:1,Total:1,Records:1,Rows:[name: Jeff Vaccaro title: Programmer]"}
My jQuery code is the following:
jQuery(document).ready(function () {
jQuery("#list").jqGrid({
datatype: processrequest,
mtype: 'POST',
colNames: ['Name', 'Title'],
colModel: [
{ name: 'name', index: 'name', width: 55 },
{ name: 'title', index: 'title', width: 90 }..........
I've tried all sorts of different variations of the addJSONData code.
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Nov 5, 2010
I'm doing a project in asp.net with a web services. My web services and my asp.net project is separate and my asp.net projet have a reference of my web services. i'm using visual studio 2008 framework 3.5 and my service web is in vb.net. i want to call the web methods of my web services in javascript my script manager is declared
<asp:ScriptManager runat="server" ID="scriptManager" EnablePageMethods="true" >
<Services>
<asp:ServiceReference path="http://localhost:2931/ServiceCompas.asmx"/>
</Services>
</asp:ScriptManager>
the javascript fuctions
<script type="text/javascript">
function test() {
alert('test');
Service1.Liste_Carte(Onsucced);
}
function Onsucced(resultat) {
alert('je suis passée');
}
</script>
service1 is the class of my Webservice and i call the function test with my button <input name="btnRecherche" class="btnRechercher" type="button" value="Rechercher un emplacement" onclick="test()" /> the problem is : JavaScript say Service1 is not defined but why .... What's the problem ? I've checked many forums and videos every body did it
sorry for the french variable
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Jan 11, 2011
all My web app is calling webservice which resides in same virtuall directory as web app . In this scenario i have a javascript function like this which works perfectly.
[Code]....
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Nov 17, 2010
This is the webservice am using.
[code]....
But my function is not going to Hello() soon after calling SetOCXVariables()
After my 'P' comes undefined and does the remaining, it goes to hello()
why is this happening?
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Jan 4, 2011
I wrote a webservice that returns an array of Strings. Below is the code for the webservice:
WebMethod()> _
Public Function CheckNotices(ByVal UserId As String) As String()
' Dim time As String = Now.Date.ToString
Dim dt As New DataTable
Dim ob As New BLL.ClsBLL
[Code]....
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