.NET Tutorials, Forums, Interview Questions And Answers
Welcome :Guest
Sign In
Win Surprise Gifts!!!

Top 5 Contributors of the Month
david stephan
Gaurav Pal
Post New Web Links

window.XMLHttpRequest - Is it possible to call the Method which is present on the same page?

Posted By:      Posted Date: September 06, 2010    Points: 0   Category :ASP.Net
Dear Friends, I am using the below XML HTTP Request for checking the username whether already exist or not, What i am doing is i am opeing a page on xmlhttp.open("GET", "CheckUserNameSupportiveFile.aspx?UserName=" + username, true); And passing the username to check with database. if (window.XMLHttpRequest) { // code for all new browsers xmlhttp = new XMLHttpRequest(); }if (xmlhttp != null) { xmlhttp.onreadystatechange = state_Change; var adad = username = document.getElementById('<%=txtUserName.ClientID %>').value; // alert(adad); xmlhttp.open("GET", "CheckUserNameSupportiveFile.aspx?UserName=" + username, true); xmlhttp.send(null); }but what i want to do is, IS IT POSSIBLE WITHOUT CALLING ANOTHER PAGE [CheckUserNameSupportiveFile.aspx?UserName=" + username ] Can i check it on the same page itself by calling method OR something on the same page itself.I do not want to pass the value to another page on and check it with DB, i want to do in same page itself.All your suggestion / advice are welcome.

View Complete Post

More Related Resource Links

How to force page to call ApplyStyleSheetSkin method



I have a few custom composite controls that set their cssclass only when calling their ApplyStyleSheetSkin method.

I worked around this by creating a function which recursively walks through all controls on a page and calls that method, but I was wondering if there isn't a way to do this automatically? (i.e. how do I tell the aspx page to call the ApplyStyleSheetSkin method inside the controls?

Thanks in advance,

Sergio Bastos

Using jQuery to directly call ASP.NET AJAX page methods

Here I am looking to explain how to call page methods using jQuery. Using jQuery to directly call ASP.NET AJAX page methods

AutoComplete using Page Method HELP!



My site has 2 web service, one connects to the database, the second one calling the data from the first web service. I try to make a web application with AutoComplete Extender using Page Method from existing search.

This is the search code:

Imports App.svcNewApp

Imports System.Web.Services

Partial Public Class AppSearch

    Inherits System.Web.UI.Page

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

        Dim aService As NewApp = New NewApp()

        Dim aDataSet As DataSet = Nothing

        Dim cityZip As String = Request.Form("cityZip")

        Dim city As String = ""

        Dim aTable As DataTable

        Dim aRow As DataRow

        If (cityZip <> Nothing) Then

            Dim n As Integer



Pop Up window on the load of the page in MVC



        I need an urgent help, when the page is loaded in the explorer, my code will hit the DB and if it fetches a record then I have to throw a pop up window when it loads the page. 

I have no idea on implementing this MVC. 

Can anyone help with this.

Kindly reply ASAP.


Open aspx page in new window or tab



    I use the following code in a Buttons onClick handler.



Is it possible to open the EIQuotationReport.aspx web form in a new window or a new tab? I could change the button to a hyperlink if required.



$.ajax post from asp.net page and __viewstate causing call to fail



Now I know that I won't be sending viewstate and eventvalidation in my ajax calls and that I will only want to send the actual form fields for efficiency purposes but I will need to know the answer to this question, to inform the more junior members of the team and my manager, so if anyone has any answers they are most welcome.

I have a simple form as follows

<form id="form1" runat="server"> 
<p>Field1: <

Call a web method in Javascript


Hi All,

I am first time working on web service and Javascript and trying to call a Web Method (web service) on a button click in Javascript.

What I want to achieve is as followed: When the button is clicked, call the web method, get the return URL value and store it to a session variable, the redirect the page to another page. However, this works only when the internet traffic is fast, it give me error when internet is slow as the Javascript is executed much faster than the web service. Is there any way to handle this?  Would be much appreciated for your help! Cheers.

Code as below:


function emailButton_onClick()


function getCurrentMapURL(getCurrentMapURLOnSuccess)
var proxy_url = 'WebService/GPSWebService.asmx/GetCurrentMap';

var response = map.print([proxy_url]);



function getCurrentMapURLOnSuccess()
emailAddress = document.getElementById('txtEmailAddress').value;

if(emailAddress != null)
alert('Do you want to send report

Binding an event method from a control in a seperate window

How would you bind a event method from a control back to a seperate window?  I have a ActiveX control hosted in a WindowsFormsIntegration wrapper.  That is operating in its own window along with all its events.  The properties of the control are handled by a class that defines the dependency objects (thanks Bob) to provide a view model between it and a window with controls for setting/getting those properties.  Since events constrained to Window 2, is it possible to bind the events back to Window 1?

Open my aspx page in new window....

Hi..On button click im using this Server.Transfer("abc.aspx", true); to transfer to abc page.. what i need is i need to open in new window by this abc.aspx page on button click..here im passing parameter to abc.aspx page, so let me know how to do...so plz let me know how to achieve this....

dynamic menu control call in login page

Hi ,i have declared two control in my master page , how wants to call this menu control in child page ( that is login page)i want to bind the menu control dynamically based on login previlagepublic Menu newMenu = new Menu();  public MenuItem newItem = new MenuItem("Master");

Usercontrol, in master page, calling a method on the main page?

I have user control called 'Header.asxc' that is registered in my master page. That user control has an image link. The clicking of this link needs to cause a dropdown on the main page to repopulate. I am comforable with delegatges, with populating the dropdown etc... My problem is I cant find the usercontrol from the page, in order to set the function event. I got this work previously when the user control was registered on the page in question but this case with the master page  has me confused. Here is a summary of the set up. 1. I put this in the Header.ascx usercontrol that is registered by the Master page. public Delegate locReloadCompanyDropdown;2. Further down in that page in the relevent _Click event, I put this. locReloadCompanyDropdown.DynamicInvoke();3. Back in the main page I declared these.. public delegate void reloadCompanies(); private event reloadCompanies doReloadCompanies;4. Finally I try to set the delegate doReloadCompanies += new reloadCompanies(PopulateCompanyDropdown); //Page.Header.locReloadCompanyDropdown = doReloadCompanies; //Header.locReloadCompanyDropdown = doReloadCompanies;You can see a couple of attempts I have made remarked out in the code above. Neither work. What am I missing here? Thanks all.  

Problem displaying a page using window.showModalDialog when resizing it.

 Hi, I have a page that is displayed using window.showModalDialog, when the page is resized the tables, text boxes and everything else that is in the page with the width 100% doesn't resize (fit the page) unless a post back is used.How can I make the page keep everything in proportion when it is resized without the need to post back? 

WCF Basic Http Binding - Two server requests per method call

We have a service that uses BasicHttpBinding/Transport Security/Windows Authentication and is hosted in IIS. I have created a unit-test application in VSTS and whenever we test a WCF method, Fiddler records two calls. 1st call - No authorization token is sent. The WCF service returns a 401 error - Unauthorized: Access is denied. Http headers as sent in the request given below. POST http://localhost/AccountScreen.svc HTTP/1.1 Content-Type: text/xml; charset=utf-8 SOAPAction: "IAccountScreen/RetrieveAccountDetails" Host: localhost Content-Length: 243 Expect: 100-continue Connection: Keep-Alive 2nd call - Authorization token is sent and the WCF service returns the expected response. POST http://localhost/AccountScreen.svc HTTP/1.1 Content-Type: text/xml; charset=utf-8 SOAPAction: "IAccountScreen/RetrieveAccountDetails" Authorization: Negotiate Host: localhost Content-Length: 243 Expect: 100-continue I am not able to figure out why there are two calls made to the server in the first place and what is the significance of the first call. Any thoughts?

How to call CodeBehind Method from Client Side

Hi forumers,How can we call a CodeBehind Method with Arguement from Client Side?Here is the idea: this wont work<script type='text/javascript"> function func(){ var str = 'Hello World'; var result = '<% =CodeBehindFunction( str ) %>' } </script>I have a variable "str" and has a value of "Hello World".. I want to pass the value of "str" to the CodeBehind Method which is "CodeBehindFunction(object obj)"..How can I accomplish this idea without the use of XMLhttprequest, is it possible?

call a server side C# method from javascript

http://forums.asp.net/t/1591584.aspx Hi friends, can anyone provide me the C# code of the above post answer(pls go to the link)..i didnt understand the VB code... i dont know VB.. my problem also same.. i have a method in a class in App_Code folder... i want to call that method from javascript.. the method takes one parameter which is list box cotrol id... the list box control also available in the same page..   Please can anyone help me on this..

How to call a method with IDataObject in click event in wpf?

As I'm new in WPF development, I came up with a problem, looks like simple, however, I couldn't solve. The problem is, how to call a method with IDataObject in a click event?? I've a method like:  public void setProperty(IDataObject obj)         {                                      PropertyGrid mygrid = new PropertyGrid();                        UIElement elt = ExtractElement(obj);             Type t = elt.GetType();             string name = (string)t.GetProperty("Name").GetValue(elt, null);             mygrid.Instance = name;         } I want to call this method in a click event. I don't know how to. I've tried but couldn't yet. Any help will be appreciated regarding this. Thank you.   Regards, Binaya

Calling a public method on aspx page from a usercontrol

Hello, I have a problem with calling a method on a aspx page from a usercontrol. The case is:I have 1 main page with 5 usercontrols, when something goes wrong in the code I want to display the error message in a Modalpopup Extender.I can create for each usercontrol a different modalpopup extender but isn't much easier when I make 1 popup in the aspx page.But the problem is: How should I call a method in the aspx page that open the popup? I have search several hours on the internet but can't find anything useful. Thanks,  
ASP.NetWindows Application  .NET Framework  C#  VB.Net  ADO.Net  
Sql Server  SharePoint  Silverlight  Others  All   

Hall of Fame    Twitter   Terms of Service    Privacy Policy    Contact Us    Archives   Tell A Friend