AJAX :: Connecting To Web Service From Javascript?
Apr 22, 2010
I had written a code to use webservice using scriptmanager... Everthing works fine with (IE -8,7 in xp and win server -2003) but in Win server 2008 IE -8 Javascript is not invoking the web method.
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Aug 25, 2010
I noticed that whenever my clients connect their accounts to my application, the Sys.UI returns null and the MaskEditTextBox is not longer showing the mask ... in other words is not working.
Did anybody have been thru this kind of scenario?
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Dec 1, 2010
I am trying to retrieve some values from a Database built in SQL Server Express 2008 using .net Web Service.
[Code]...
Whenever i click run in Visual Studio 2008, it shows the startup page in IE that has two Methods (HelloWorld and authorizePassenger). When i click my method authorizePassenger it gets invoked and it asks me for input but when i input and click invoke IE shows HTTP500 error. The code above working fine in Standalone VB.net Application, so i guess i m doing the coding of Database correctly.
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Jul 22, 2010
My web service uses .Net Framework 2.0. An e-learning application reads and updates an Access database in the web service via Http Post commands. I test the e-learning application and the web service using the version of IIS 7 that came with Windows Vista. I run IIS using localhost in my browser.
All works well. But a friend is having trouble running the same test with my files on her IIS 6 server. So I'm developing a checklist of issues in setting up an IIS 6 server to run a web service. I plan to include all possible causes of problems including permissions, accounts that are needed, etc. Are there resources to which I can go for this checklist?
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Apr 6, 2010
I am using ASP.Net 3.5. I have fiiled dropdown list in javascript using ajax service but unable to get its selected value in button click event on server side.
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Jun 15, 2010
I have a web service in which i am making connection to the database to get data..now i want that the app pool account should be used to make the connection and not the current user's credentials..can somebody tell me step by step what changes do i need to make like setting impersonation=true etc.
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Jan 18, 2011
In my web site i'm using Asp.net web service (using javascript) to update certain values to DB. I'm concered about the security threats. How can i secure ASP.net Ajax web service using javascript
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May 18, 2010
I'm trying to learn AJAX but I am having trouble getting things working. I downloaded an example app from the web that was written in C# and have got it working perfectly, the next stap was to convert it into VB but for some reason this does not work. I keep getting a "Error: 'myServices' is undefined " error message on the web page. Try as I might I cannot cure this and I know it is something so simple i'm just looking past it.
I'm trying to get some autotext functionality working but I've cut the code right down just to try and get it working, everything seems to work fine apart from the webservice call which returns the 'undefined' error. If I click the button on the web page the code behind is invoked and the webservice code is also run without problems. I just can figure out why I can't run the webservice directly from the web page.
The code
Default.aspx html/javascript
<%@ Page Language="VB" AutoEventWireup="True" CodeFile="Default.aspx.vb" Inherits="_Default" %>
<!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>
[code]....
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Jan 13, 2011
I created a number of standard WCF Services (Service Contract and Host (svc) are in separate assemblies). I fired up a Web Site in IIS to host the Services (i.e., address is [URL]). Then in my Web Site project I added the reference. I am able to call the services normally. I am needed to call some of the services client side. Not sure if I should be looking at articles calling WCF services through AJAX, JQuery, or JSON enabled WCF Services. Some of the changes I made was adding the following to the Operation Contract:
[OperationContract]
[WebInvoke(Method = "POST", UriTemplate = "SetFoo")]
void SetFoo(string Id);
Then this above the implementation of the interface:
[AspNetCompatibilityRequirements(RequirementsMode =
AspNetCompatibilityRequirementsMode.Allowed)]
Then in the service webconfig I have this (parens are angle brackets):
<serviceHostingEnvironment aspNetCompatibilityEnabled="true">
<baseAddressPrefixFilters>
<add prefix=[URL]>>
</baseAddressPrefixFilters>
</serviceHostingEnvironment>
<serviceHostingEnvironment multipleSiteBindingsEnabled="false" />
Then in the client side I attempted this:
<asp:ScriptManagerProxy ID="ScriptManagerProxy1" runat="server">
<compositeScript>
<Scripts>
<asp:ScriptReference
Path=[URL]/>
</Scripts>
</CompositeScript>
</asp:ScriptManagerProxy>
I am attempting to call the service like this in javascript: wcfservices.SetFoo(string Id); Nothing is working. If it is idea or a better solution to call JSON enable, JQuery, etc.... I am willing to make any changes.
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Mar 18, 2010
I've searched far and wide, but can't find out why this is happening. I have a clientside javascript ajax call into a web service that works fine if both the service and the calling page are in the same directory. If I try to move the web service to another virtual directory, I get this:
Exception type: InvalidOperationException Exception message: Request format is unrecognized for URL unexpectedly ending in '/js'.
Here are the relevant code tidbits for the separate directories attempt.
aspx file:
[Code]....
CallYahooQuotesServiceMethods.js:
[Code]....
asmx file:
[Code]....
I tried this in my web.config, but it didn't work:
[Code]....
Authentication mode is Windows. If I have to impersonate to do this, I'm not sure how I'd pull it off with Javascript.
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Jan 21, 2010
I am looking to incorporate web service into my application but am running into a problem. The following line of code in FwkComm.js document generates the following error: Microsoft JScript runtime error: 'FwkService' is undefined.
[Code]....
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Jul 12, 2010
I have and web application and there are two dropdowns. I want to use Javascipt to populate the the second dropdown on basis of the selection of the first dropdown.
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Mar 7, 2010
How can I pass two variable values to a web service web method using JavaScript and a DynamicPopulateExtender?
Some background of my issue:
I have a fully working cascading drop down list accessing a database.
My parent Cascading Drop Down List is a list of countries and the child displays the relative regions i.e.: USA returns Iowa, Maryland, Oregon etc.
I also have a 3rd Drop Down List control that allows the user to select the language to display the region details i.e.: Selecting the language of Chinese will return a list of regions of the USA in Chinese (held in the database).
I now want to display the translated country name from the 3rd Drop Down List in a label on the page.
I cannot just use the text from the country drop down list as this text value remains in English. The translated value must be returned from the database.
So far, I have installed a DynamicPopulateExtender:
[Code]....
I then wrote a web method (in the Cascading Drop Down local Web Service) to return the translated country name. To do this I have had to hard code the countryID (10663) and the translationLanguageID (1331) asshown below:
[Code]....
This does return the translated country name, but the variables are hard coded!
My question is how do I pass the countryID and the translationLanguageID to the Web Method GetTranslatedCountryName() from the DynamicPopulateExtender? Or even if there is a better way to achieve my task?
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Apr 1, 2011
Scenario : I am going to access external web service [ExternalWS] using AJAX. So obviously, need to create local proxy service [LocalProxyWS] first, which in turn will access the external web service. Now, the external service webmethod [Process] basically redirects the current page on our site to their site, does some work and then return back to our site.
What I want : I want that when the user clicks the button ('Process') on our site, it should open a new window and then starts executing the request on the new window, so that I can have the page on my website to be displayed permanently (which will poll a request every 15 seconds to the external service (via local proxy) for the status).
Local Proxy service which calls external service is as follows..
[ServiceContract(Namespace = "LocalProxy")]
[AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
public class LocalProxyToExternalService
{
[OperationContract]
public void InitiateTransaction(string amount)
Basically, I am opening a new window from the button click and then want to process the new request in that new window, so that I can show the status to the user from the current page on my website So far, it opens the new window, but doesn't transfer the request on to that, but I get an error message in firebug as follows...
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May 20, 2010
While working with LINQ to ENTITIES I see that there is only a way to use stored procedure that is returning one entity only, or a view that is a join of two entities.
But what if I need in ASPX page to get two tables that there is NO connection between them, no join can be done between them at all.
I have one Stored Procedure that return the two tables, but entities don't support this right now.
I can split them to two Stored Procedure and call each of them separately.
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Apr 6, 2010
I am using asp.net 3.5. I filled dropdown list in javascript using ajax service but unable to get its selected value in button click event on server side.
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Nov 25, 2010
So, I am having this weird problem. When I access my web site while I am connected through company network (either directly or vpn), I am not this error and able to use all AJAX functionalities.
Now, my problem occurs when I am not inside of company network (from home) and trying to access the web site, I am getting error and all the AJAX functionalities are disabled.
I go through Microsoft ISA server to logon to network when I try to access the site externally.
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Jan 6, 2010
How to Call A ASPNET web Service from javascript?
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Nov 5, 2010
As the title states, I'm trying to call a web service written in ASP.Net (Same solution, but different project in visual studio) from javascript. Since I added the web reference for the service prior to this for calling it in VB.Net, I tried to use this reference by directly calling it.In the body of the Default.aspx page, I have this code:
<asp:ScriptManager id="ScriptManager1" runat="server">
<Services>
<asp:ServiceReference Path="~/App_WebReferences/localhost/ServiceName.discomap" InlineScript="true" />
</Services>
</asp:ScriptManager>
but in javascript, I can't call my service at all. Could anyone explain me how? I'd want to do something like this:
<script type="text/javascript">
alert(ServiceName.HelloWorld())
</script>
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Sep 8, 2010
am new to webservice accessing from javascript.I call a webmethod from javascript which returns a string array. whith this array i bind a dropdown list at client.At dropdownList selectedIndexchanged event I found there is no item in DropDownList. Is there any way how to bind the DropDownList using webMethod so that on postback i can get the dropdowns item.
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Jul 15, 2010
A WCF web service with the right class and method attributes can be accessed as a JavaScript file in a script tag. That is:
<script type=".." src="http://someserver/someservice.wcs/js"></script>
Is it possible to do the same thing with System.Web.ApplicationServices.AuthenticationService?
I'm creating a PhoneGap application developed in static HTML/JavaScript, so I cannot use the script manager.
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Apr 29, 2010
How to Access Webservice Webmethod in Javascript
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Dec 11, 2010
I have several ASP.NET sites, hosted on the same domain (different subdomains) and working via HTTPS.I have WCF service, hosted on the same domain.I have a separate state server for sessions. why - i will reply later, but it's a 'must') On my sites, I use grid components from Telerik (but actually it does not matter) that ask for data from WCF service and must be filled with this data.I cannot manage to make POST request to WCF service from javascript: for some reason it's always either GET or OPTIONS (no matter if I use Sys.Net.WebServiceProxy invoke or just a plain jquery AJAX request). It happens even if I indicate COOKIE mode
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Mar 29, 2011
Most WCF web service I have developed were consumed in a server side code (by adding a service reference in visual studio or creating a proxy class using svcutil.exe. I have never consumed a web service in a client code. So I apologize if I am using wrong terminology or my question does not make sense.We have a browser add-on or plugin that connect to a device on client computer (think of it as active-x control for internet explorer) inside a asp.net web page.This browser plugin/add-on then will be sending measurement data to the web server. After some research it appears to me that I can do eithera) Develop an AJAX enabled WCF web service and use script manager and javascript to consume it inside the web page that interact with browser pluginb) Develop a WCF web servcice (not sure about AJAX enable) that serialize request and response to JSON, and use JQuery inside asp.net page to consume it.QuestionWhat's difference between approach a) and b)? Which is better in particular scenario I have described.
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Aug 24, 2010
[System.Web.Script.Services.ScriptService]
public class Quotes : System.Web.Services.WebService
{
ebMethod]
public void Calculate(int param1, int? param2)
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