AJAX :: Is It Possible To Call A Custom Method Or Class Before Accessing Webmethod From PageMethods

Jan 19, 2010

is it possible to call a custom method or class before accessing webmethod from pageMethods ?

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Similar Messages:

Web Forms :: Error While Accessing Page Label Control In WebMethod During AJAX PageMethods Call

Jul 16, 2012

I found this Article from link : [URL] .... that explains how to call server-side Method from javascript,

I used your code, my server-side function is static, public, and also I added

<asp:ScriptManager ID="ScriptManager1" runat="server" EnablePageMethods="true">

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AJAX :: Write A Wrapper Method Around The WebMethod When Using PageMethods?

Jan 19, 2011

I am using ASP.net with WebMethods to show data to the customer and save data entered by the customer.

My current framework uses javascript to create an xml with all of the values of all the html elements in de "div" (or other element). This xml is converted to a string and send to the webserver using PageMethods.

When I receive this xml (as a string), I parse it with my own XmlDataParser which does some security checks.

I need to parse the xml to an XmlDataParser in every PageMethod I use, and I also need to catch different exceptions (like exceptions that are thrown when data is validated) to show them to the user (=> The reason why is explained in one of my previous posts: [URL]

I wonder if it is possible to write a wrapper around the WebMethod, so I can parse the xml to the XmlDataParser in this wrapper, and pass it on to the code behind, and process exceptions that occur in the code behind?

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JQuery :: Accessing Webmethod Via Ajax Call

Jul 6, 2010

I have 2 web pages edit.aspx and webmethods.apx. In edit.aspx there is some jquery code to get some data :


With this I try to get a Json object from the webmethods.aspx page :


I get an error back that says "Parser Error", I even did put an breakpoint on the webmethod but it is like it's never triggered. Is my url wrong if I'm in the following url :


Should I use something like ../WebMethods.aspx?

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Is There A Way To Call Custom Method Of Custom Role Provider Class

Apr 21, 2010

I have created my own custom role provider class "SGI_RoleProvider" and configured properly.

Everything is working fine.

Suppose that I have added a public method say "SayHello()", then how can i call that. Because if i am using Roles then the method is not displayed. If i am forcefully using that Roles.SayHello() then compiler gives the error.

how can i call this. Because creating a new instance of SGI_RoleProvider is meaningless.

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Jquery Ajax With WebMethod In Public Method Call

Mar 25, 2010

Aspx Page:
$(document).ready(function() {
$("#btnn").click(function() {
type: "POST",
url: "TestPage.aspx/emp",
data: "{}",
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function(msg) {
public void grdload()
GridView1.DataSource = GetEmployee("Select * from Employee");
public static void emp()
TestPage re = new TestPage();

I Can't Gridview Data Load ? How To Make GridView Data Load?

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Call Ajax.BeginForm From A Custom Helper Method ?

Mar 20, 2011

Can I call Ajax.BeginFrom from a custom helper method ?

AjaxHelper is not available in a custom helper method, so I tried to pass the "Ajax" available in ViewPage to Helper method while calling it, but then in method, BeginForm is not available on that passed "Ajax" parameter.

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Accessing PageMethods Through AJAX And Integrating With Forms Authentication?

Nov 8, 2010

I have an ASP.Net page with some static methods that I access from the client side using AJAX and the PageMethods capability of the ScriptManager control. The web site has forms authentication setup.My problem is that when the user is not signed in, and makes an action that calls one of the page methods, the operation fails and the failure handler is called as expected but the error object has the status code 500 (internal server error), while it was expected to be 401 (not authorized), because it's the forms authentication module who interrupted the request.Even when I write code like this in the service method:


I also get the status code 500, and an indication of a ThreadAbortException (because of Response.End) in the failure handler. It appears that the handler that carries out service methods calls consider anything that interrupts the execution of the method "an internal server error" regardless of the cause.

Now what should I do if I want to provide a message saying "You are not logged in" to the user, or even redirect him to the login page, while I can't distinguish between the several errors that may occur because I always get status code of 500.

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WCF / ASMX :: Calling A Class Method On Webmethod?

Dec 10, 2010

i wrote a webmethod on webservice. it will do adding product to shoppingbasket. But it doesn't work. i used a class and its method in this webservice method. error is about it. my code are below:


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AJAX :: Can Not Call Two Different Pagemethods With Two Service Methods

Oct 1, 2010

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.


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AJAX :: What Is The Best Method To Use ICallback Or PageMethods With JQuery

Apr 3, 2010

I am creating a website in asp.net its a very big site about 250 pages and with a big sql database. I am confused as which ajax method i should follow. There are three options.

1. ASP.NET UpdatePanels -: Simple to use but causes a lots of uneccessary request and viewstate. I want my pages to open as quick as possible.

2.ICallback-: Causes less request and renders the page quickly. But security concerns and viewstate are there.

3.Page Methods with jQuery-: No Security anyone can quickly hack the parameters passed using "POST" mehtod.

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Javascript - How To Use MS Ajax PageMethods To Call A Function On The Server

Jan 16, 2011

I have a project that uses PageMethods to call functions on the server. The server functions (written in C#) return the values as array of strings, without doing any kind of serialization and in the client side (from Js) the accessing of the return values is by using static variable called arguments. I found that sometimes for some users (cases are not repro) sometimes an exception occured

"WebServiceFailedException the server method 'Foo' returned invalid data. the 'd' property is missing from JSON."

Some searching on google I found that people are serializing the return values using DataContractJsonSerializer class and in js accessing the return value using one of the callback function Example:

function OnRequestComplete(result,
userContext, methodName) {
var Person = eval('(' + result + ')');
alert(Person.Surname); }

So is the first technique is correct? or what?


the function on the server is defined on the default.aspx.cs file as follows:

[System.Web.Services.WebMethodAttribute(), System.Web.Script.Services.ScriptMethodAttribute()]
public static string[] Foo(string s);

from the client side the calling is as follows


Also all the users have the same browser version (IE8)

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AJAX :: How To Check Asynchronous Call Using PageMethods In Global.asax Using VB.NET

May 27, 2010

I am using PageMethods in my pages, and we have some requirement in which some maintenance process happened in certain time span, so in that time we set on DB flag consider as True False, I have written my code in Global.asax where in application_AcquireRequestState(...,...) Method I am checking the flag and depanding upon the flag I am redirecting my Page to one Maintenance dummy page, so application_AcquireRequestState() method working properly when page get postback or I am using thru any server control, but when I am using Asynchronous call using PageMethods in application_AcquireRequestState I am getting exception, Can anyone solve my problem I am using VB.NET.


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C# - How To Call Class & Method From A Button In Another Class

Jun 24, 2010

I have a WindowsForm that has a DataGridView that shows output of my app. The class with the button is DriveRecursion_Results.cs. I want it so that once the button is pushed by the user, my method FileCleanUp() in my SanitizeFileNames class is called. I'm not quite sure how to do this though.Here is the code for both classes:

public partial class DriveRecursion_Results : Form
public DriveRecursion_Results()
private void listView1_SelectedIndexChanged(object sender, EventArgs e)

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WCF / ASMX :: Web Service To Inherit From A Custom Base Class That Inherits System.Web.Services.WebMethod Inste...

Oct 18, 2010

Recently, I tried to get my Web Service class to inherit from a custom base class that inherits from System.Web.Services.WebMethod instead of the System.Web.Services.WebMethod directly.

However, I've been getting Error 500.

Public Class Service1
Inherits BaseClass
<System.Web.Services.WebMethod()> _
Public Function GetSessionID() As String
GetSessionID = Me.Session.SessionID
End Function
End Class

public class BaseClass
Inherits System.Web.Services.WebService
public property Property1 as string
public property Property2 as string

End Class

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Web Forms :: Accessing Non-Static Method From Another Class Without Instantiate

Apr 27, 2016

I have a class and call class A method by creating class A object

unlike this call Class B method by using class B object 

Code is here below

class A {
public void A1() {
Console.WriteLine("I am from Class A");
class B {
public void B1() {
Console.WriteLine("I am from Class B");

[Code] .....

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AJAX :: How To Call WebMethod Using AngularJS

May 7, 2015

I am trying to create a function that when a button is clicked it will pass all my records to my json page which will save my data. This is what i have so far

var t = this;
t.RecordsSave = function ($http) {
for (var i = 0; i <t.records.length; i++) {
var record=t.recordss[i];
var data = params( {
record: record.Number[i],

[Code] ....

I get the following error "params is not defined"

and "Cannot read property '0' of undefined"

How should i go about this. not familiar with angular js

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AJAX :: Accessing Placeholder From Webmethod - An Object Reference Is Required For The Non-static Field

Mar 22, 2010

Aplogies if this has been discussed before but I couldn't find an answer.

I'm trying to use jquery/Ajax to access some webmethods in my codebehind. This is fine, but I would in my function like to reference a placeholder (phStory in the code below) on my page and also load a usercontrol into that placeholder.

Unfortunately I get the message: "An object reference is required for the non-static field, method, or property 'TestControls.phStory' " and similar for the usercontrol. Does anyone know how I can still access my placeholder and usercontrol from within this.

It has to be stati as it's a WebMethod but this then throws up these errors.


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Jquery - JQGrid - Cannot Call WebMethod But Can With Ajax

Mar 1, 2011

I am new to jqGrid and I have found it difficult to follow the documentation jqGrid Documentation / I cannot figure out how to call a WebMethod when setting up the JQGrid. I have been successful in making an Ajax call to get the data and then setting up the JQGrid with local data. I think its an extra step in the setup process and that I should be able to provide the path to the webmethod using the url property. The editurl property is the same way. I am never actually receiving the post to the server. Attempted JQGrid Setup

function GetData()
type: "POST",
url: "Default.aspx/GetUsersJSON",
datatype: "json",
height: 250,
colName: ['Username', 'Email'],
colModel: [
edit: true,
add: true,
del: true
public static string GetUsersJSON()
var users = new List();
using(UserAdministrationSandboxDataContext uasd = new UserAdministrationSandboxDataContext())
users = uasd.GetUserList();
JavaScriptSerializer serializer = new JavaScriptSerializer();
return serializer.Serialize(users);

Current Code I got it working correctly now, but I still have one final question. Why did I have to set the 'repeatitems: false' in order to display the content? Some of the caveats to get this to work include the different ways to setup the ajax request. (Ajax: type) is (jqgrid : mtype) (Ajax: contentType) is (jqgrid : ajaxGridOptions: { contentType: })

And finally understanding the documentation from the documentation on how to setup the JSONReader.

function GetUserDataFromServer()
url: "Default.aspx/GetUsersJSON",
mtype: 'POST',
ajaxGridOptions: { contentType: "application/json" },
datatype: "json",
serializeGridData: function (postData)
return JSON.stringify(postData);
jsonReader: {
root: function (obj) { return obj.d; },
page: function (obj) { return 1; },
total: function (obj) { return 1; },
records: function (obj) { return obj.d.length; },
repeatitems: false
datatype: "json",
height: 250,
colName: ['Username', 'Email'],
colModel: [
name: 'Username',
index: 'Username',
width: 100,
editable: true
name: 'Email',
index: 'Email',
width: 220,
editable: true
name: 'IsLockedOut',
index: 'IsLockedOut',
width: 100,
editable: true,
edittype: 'checkbox'
caption: "Users"
Web Method
[ScriptMethod(ResponseFormat = ResponseFormat.Json)]
public static List GetUsersJSON()
using (UserAdministrationSandboxDataContext uasd = new UserAdministrationSandboxDataContext())
return uasd.GetUserList();
One JSON Object from the List
{"__type":"UserAdministrationSandbox.UserData","PKID":"00000000-0000-0000-0000-000000000001","Username":"TestUser","ApplicationName":"Test","Email":"TestUser@test.com","Comment":"TestUser","Password":"D41D8CD98F00B204E9800998ECF8427E","PasswordQuestion":"Is this a blank Password?","PasswordAnswer":null,"IsApproved":true,"LastActivityDate":"/Date(1298869200000)/","LastLoginDate":"/Date(1298869200000)/","LastPasswordChangedDate":"/Date(1298869200000)/","CreationDate":"/Date(1298869200000)/","IsOnLine":false,"IsLockedOut":false,"LastLockedOutDate":"/Date(1298869200000)/","FailedPasswordAttemptCount":0,"FailedPasswordAttemptWindowStart":null,"FailedPasswordAnswerAttemptCount":null,"FailedPasswordAnswerAttemptWindowStart":null}

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Forms Data Controls :: Accessing Properties Of The GridViewRowEventArgs Class Within A Regular Method?

Jan 6, 2010

I have a regular method I want to call. I need to use properties of the GridViewRowEventArgs Class within this method.



Of course the above code is not valid because I don't think you can put GridViewRowEventArgs within the method like that. I don't want to put it within a event handler because that even handler is doing other things. I want to be able to call this seperatley.

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Can Generate A Class Automatically On Method Call

Feb 25, 2011

I have created an extended method for DataTable. I want to generate a class automatically in my solution when i call that method while writing a code as Visual studio does when it doesnt find the method.e.g mytable.mymethod(); Generate a class

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Spring.net And Nhibernate And Jquery Ajax Call To Webmethod At Codebehind?

Jan 28, 2011

I am trying to make a jquery ajax call to a static method on the codebehind file. The problem is that ArtistManager injected by Spring is not static and I cannot use it in the static webmethod. I am looking for any ideas on how to implement this



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AJAX :: Invalid Hexadecimal Character Returned By Webmethod Call?

Mar 8, 2010

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)


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Web Forms :: Call MsCaptcha Control In Static WebMethod Jquery Ajax

Dec 1, 2010

I want to call MsCaptcha Control in Static WebMethod,for validating. so,I want to check mscaptcha value in javascript or jquery without refresh the page.I think it is my solution that i use JqueryAjax.

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Add Record Via Jquery Ajax Call To Webmethod And Update Dropdown List

Jan 26, 2010

i manage to add recrod via jquery ajax call to webmethod but i want to update the dropdown list once the record is been added. i dont want to use update panel. what would be the best way of doing that.

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