AJAX :: Invalid Web Service Call, Missing Value For Parameter?
Mar 2, 2010
In a web page, I call a web service (located in the sub folder WebServices) with ajax asp.netHere my aspx code:
[Code]....
My web site uses integrated windows authentication and all works fine.However, my web service doesn't need authentication and in order to not have 2 requests (because of http code 401), I've allowed anonymous access on the WebServices folder. Doing this, I get the folowing error message when I call a web method: "Invalid web service call, missing value for parameter: user"When I look at my body request with Web Development Helper, I can see {"user":"toto"}. So, I don't understand why it's not working.Another weird thing: when I run Fiddler2 instead of Web Development Helper, every thing works fine. I turn off Fiddler2, and it doesn't work any more.
'm having some difficulties to consume a Web Service in VBScript. Everytime I try to run it presents some error (Missing parameters / Internal server error / Status 500). I don't know what can be wrong.
Here's my VBScript code:
Set oXMLHTTP = CreateObject("MSXML2.XMLHTTP.4.0") Set oXMLDoc = CreateObject("MSXML2.DOMDocument") oXMLHTTP.open "POST","http://192.168.0.32:9090/webservice1.asmx/Conecta? sID=1",False
I have created a web service (.asmx) which is working fine locally.Now when a client of ours is trying to access this web servce he receives an error sayinginvalid action parameter.Any idea why this error appears..also will
I have Master Details JQGrid.My details JQGrid have Edit,Add,Del options. my problem is when I click on submit button to add data or edit data I faced with this error: "500 Internal Server Error" and it's response is
but when I click on image button below error happen:Invalid postback or callback argument. Â Event validation is enabled using <pages enable EventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page. Â For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. Â If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.ArgumentException: Invalid postback or callback argument.  Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page.  For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them.  If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.Â
I have a 2007 excel addin app (VS2005) which calls a web service (also developed in VS2005). When the webservice returns a large amount of data I get the following exception
System.InvalidOperationException: There is an error in XML document (1, 14493956). ---> System.Xml.XmlException: ' ', hexadecimal value 0x1C, is an invalid character. Line 1, position 14493956. at System.Xml.XmlTextReaderImpl.Throw(Exception e)
I am trying to use the Slideshowexternder control with a contextKey that I've set from a query string. I set the contextKey in the default.aspx.vb Page_Load as I've read in other posts, but I am still getting an error:
The server method 'GetSlides' failed with the following error: System.InvalidOperationException -- Invalid webservice call, missing vaule for parameter: 'ContextKey'
I'm going on my 3rd day trying to get my Ajax AutoComplete textbox to call my web method. Based on my google searches, I'm not alone. I suspect the problem has something to do with the ServicePath property on the extender, although I'm not sure. My web service is at the same level, on the same server as my test web page. I'm not sure exactly what should go into the ServicePath property, although I think I've tried every possibility. Below is my web service followed by my script.
using System; using System.Collections.Generic; using System.Linq; using System.Configuration; using System.Web; using System.Web.Services; using System.Data; using System.Data.SqlClient; using System.Data.Common; using AjaxControlToolkit; using System.Text; using System.Xml; using System.Xml.XPath; using System.IO; using System.Collections.Specialized; using System.Web.Services.Protocols; [WebService(Namespace = [URL])] [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() { } [System.Web.Services.WebMethod] [System.Web.Script.Services.ScriptMethod] public string[] AutoCompleteNames(string prefixText, int count) { System.Data.SqlClient.SqlConnection cxn = new System.Data.SqlClient.SqlConnection(ConfigurationManager.ConnectionStrings["HumanResourcesConnectionString"].ConnectionString); cxn.Open();.....................
[ServiceContract(Namespace = "")] [AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)] public class Aja { [WebGet] [OperationContract] public string Hi() { return "hi world!"; } }
and I'm trying to do this: $.get('Aja.svc?method=Hi', function(d) { alert(d.d); }); In firebug I see that the result is HTTP Error 404.17 - Not Found The requested content appears to be script and will not be served by the static file handler. I use .net 3.5, jquery 1.4.4
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:
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.
I am using an AJAX dropdownlist control with two dropdownlist. Instead of using a webservice to populate the data, I used the pagemethod to populate. My problem is the second droplist won't populate. I get a server error, 500 in the droplist. The first droplist populates fine.
BUT here's the real kicker. If I reverse the order of the public static function such that GetHelloList2 comes BEFORE GetHelloList1 in the code, then the GetHelloList2 works ...... it just seems like it is only firing one pagemethod event and allowign only one.
I have one ajax call web service, and want to add some http headers using javascript, can we do that use setrequestheader in ms ajax?This is my javascript
I know this is a pretty common issue as i have read a lot of posts from people with similar issues. However thus far what i have uncovered doesn't seem to help resolve my issue. I have used the ModalPopupExtender regular enough but this is my first time needing the Dynamic side of things. The code I have is very basic and generic at the minute..I have the following ASPX code in place:
[Code]....
Now just to say at this stage the Modal Dialog box pops up and closes 100%. So my ProductPopulate.asmx service at the moment for testing is just using the VS2010 default Web Service with a few changes that i will explain.
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So the changes i have made to the default VS2010 webservice is from this article http://sandblogaspnet.blogspot.com/2009/07/working-with-modal-popup-extender.html
I changed the default HelloWorld method to static and also uncommented the following line
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So this is as far as my code has gotten at the minute. The Modal Dialog pops up 100% and what i would expect to see within the dialog box would be the text "Sampling Control" from the DynamicContextKey. Instead what i get is the "Web Service call failed: 500" error. I have stripped everything back to basics as you can see.. but for some reason i am still getting this error. I have used Web Services before from time to time without any issues and i have used the ModalPopupExtender without any issues.. but i am left scratching my head as to what i am missing on putting the two together.
Also just to note, both ASMX and ASPX files are currently in the root of the web project to rule out any path issues. Also i am using the VS Web Service to preview and debug.
I'm not able to call a service using the scriptmanager and javascript. But when I include the service into the project i call it. but when i seperate it in another project. I'm not able to call.
I'm just learning MS ajax and am having problems getting a relatively simple test to work. I'm attempting to call a web service (of the .asmx variety) to return a very simple 3-column table to render in a dataView in an .aspx page. I've successfully created a working service and can by stepping through the service code it's getting the data correctly. The problem I'm having is that it stops with an exception in MicrosoftAjaxDebug.js on this line:
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where my user_table contains 3 columns: user_name, user_key, user_ID. Real simple.My test.aspx page to get this data looks like this:
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One more thing, I'm a little confused between the two downloads I've found, "MicrosoftAjaxLibrary_Preview6.zip" and "AspNetAjaxLibraryBeta0911.zip". From what I can tell, the latter contains all the old Ajax toolkit gadgets as well as the MS Ajax scripts. Is the MS Ajax download just a refresh of the ajax scripts in the Asp.Net ajax library? I've installed and am using the preview 6 scripts for my website.
web service method(getMainHeads) with parameter is not calling with auto complete text box extender(same method with out parameter is calling fine). My Service is
[System.Web.Script.Services. ScriptService] public class InvService : System.Web.Services.WebService { ItemMainHeadMsts objItemMainHeadMsts; DatabaseHelper objDataHelper; [WebMethod] public string[] GetMainHeads(string value) { List<string> oList = new List<string >(); objItemMainHeadMsts = new ItemMainHeadMsts (); objDataHelper = new DatabaseHelper (); objItemMainHeadMsts = ItemMainHeadMstBase.SelectByFieldAuto("IMHDesc" , value); foreach (ItemMainHeadMst mainHead in objItemMainHeadMsts) { oList.Add(mainHead.IMHDesc); } return oList.ToArray();..........................
Some of my customers using Internet Explorer can't use my website because the call to my .net webservice failed. Under FF and Chrome no problem. For most of my customer using IE, it's working fine also but not for all...
I have isolated a call to the webservice that failed
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I can't find why it's not always working with IE. I'm not able to get the error on my computer (even by changing security, privacy settings in IE).
I´m using jQuery to make the ajax calls to web services. I´m not using json, I want the information in XML. If I don´t pass parameters and I make the WS parameter less it works but if I want to pass a value as parameter (I tried int and string) it doesn´t work. Here is my code:
jQuery: [Code]....
The web service
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The error that I get from firebug is an exception System.InvalidOperationException and it says that the parameter region_id is missing.It can´t be very difficult because it works without parameters but all the information I find in internet
When I was reading the blog Using jQuery to Consume ASP.NET JSON Web Services
I have seen this argument:
"By using jQuery to call the web service directly, we've eliminated over 100 KB of JavaScript and three extra HTTP requests. "
Why does the ASP.NET AJAX call to a .NET Web-Service needs 3 extra HTTP requests? What are those requests? (I wonder how jQuery manages the call with lesser HTTP requests in this case).
I am trying to call a web service function within my own ASP.net (code behind) using AJAX on the page.
Once i push the button to execute the JS/AJAX/codebehind - I got an error.
POST http://************/admin/Admin.aspx/getDBInformation 500 (Internal Server Error)
This is my code below that I am currently using:
Code: <WebMethod> _ Public Shared Function getDBInformation() As String loadDBData() Return JsonConvert.SerializeObject(dbInfo, System.Xml.Formatting.Indented) End Function End Class
