My application is using the net.tcp WCF service with a callback channel. For some reason I'm not able to send callbacks on event. Here's what I'm doing (all code server-side): On initialization: OperationContext Context { get; protected set; } ... Context = OperationContext.Current; On event: var callback = Context.GetCallbackChanne...
I'm trying to get an jquery ajax callback function to update the background colour of a table cell, but I can't get it to work. I have the following code (which produces no errors in Firebug): $(".tariffdate").click(function () { var property_id = $('#property_id').attr("value"); var tariff_id = $('#tariff_id').attr("value"); ...
edited my original question The problem is the same for setting the id off a newly added element or if I use the argument noteid from the function. The result is that every element get's the same id if this function get's looped. How can I set a different id for every newly added element??? As it is now, the value in the submit event...
Suppose I have a method in my controller that is called via a jQuery AJAX call. E.g. I'd like to delete a user. When everything goes fine, I return new Content('ok') and exit the method. What should I do when an error occured? I'd like to indicate it by an appropriate status code, so that my error call back would be called called. Why s...
I have implemented in my python code a callback for variable arguments similar to what can be found here: hxxp://docs.python.org/library/optparse.html#callback-example-6-variable-arguments Adding the option like this: parser.add_option("-c", "--callback", dest="vararg_attr", action="callback", callback=vararg_callback) The problem ...
In Firefox, if you go to Tools -> Add-ons, in the list of extensions each one has an "Options" button. I would like to enable this for my extension and navigate the browser to a webpage where they can set options relating to my extension. The extension is an XPCOM extension, so if I can just register for a callback when the button is p...
I'm trying to retrieve the SubItem in my ListView from another thread, but I keep getting the Item instead of the SubItem. I'm not sure how to code this properly. Below is the code I'm using: Delegate Function lvExtractedCallback(ByVal x As Integer) As String Private Function lvExtracted(ByVal x As Integer) As String Static Dim l...
Hello all, I need to find a way to call a vb.net function in my aspx page from javascript. I have a Jquery function that makes the .drop class .droppable, and whenever I drop a .draggable onto a drop target, my Jquery code successfully fires a java alert statement. All in pure javascript. What I need to do is some heavy math! I do unde...
When I use the fade/slide/animate functions in jQuery the callback gets called multiple times for each element the effect is applied to. This is by design of course. I just want to know when the last callback is called. Here is what I came up with- it fades out all the divs and displays an alert() when the last callback is fired. $(...
I know that it's possible to implicitly provide asynchronous interaction using: Asynchronous Delegates Asynchronous Callbacks I was just wondering what other methods .Net supports for asynchronous interaction? Help greatly appreciated. Regards EDIT: Maybe I didn't explain myself correctly.... I UNDERSTAND THREADING AND CONCURRENC...
I am using some third party library to connect to a server via async protocol and get response back. For example method to get userid by username looks like this: public int getUserid(String username) { int userid = 0; connection.call("getUserid", new Responder() { public void onResult(final int result) { System.out.println(...
I have a system that sends a object to another service via WCF using MSMQ. The service picks the message up fine and does what it have to with it. But the problem i have now is that i need to send a response to the calling system. Example: Create a Customer object Populate the information Send the message to the service using WCF ove...
I'm using a SDK for a usb camera. The SDK specifies that for each frame grabbed, a callback function will be called. The callback function is defined inside the SDK, it gets a data pointer to the image and a structure used to interpret the data. All of that works correctly. To make a useful application out of that, I need to access a f...
I was wondering what to take into consideration when deciding between a full postback or a quick callback. There are two extremes: You could do it the "old" way, where every user action causes a full postback. Or you could conceivably ajaxify your whole web application so as to never cause a full postback. Both options don't seem to m...
Hi all, Is there a way to pass more data into a callback function in Jquery? I have two functionsm and I want the callback to the $.post, for example, to pass in both the resulting data of the AJAX call, as well as a few custom arguments function clicked() { var myDiv = $("#my-div"); // ERROR: Says data not defined $.post("someurl.php...
Why do we need callbacks in ASP.NET or any server side technology? One answer can be, to achieve asynchronous calls. But I am not interested in its technological perspective. Please tell me the philosophical perspective. ...
Why can't we write a JavaScript code using Response.Write(".....") to serve the same purpose as RegisterStartupScript()? ...
Is there a design pattern that deals with callback mechanism? ...
I have a JSON object with a key element called callback. { "id":34, "description":"", "item_id":4, "callback":"addNew", "filename":"0000072.doc", "type":"News", "ext":"doc", "size":46592 } I would like to call the javascript "addNew" function. I tried. json.callback(json); But does not work. Any idea? ...
Hi, I have been thinking about the difficulty incurred with C error handling.. like who actually does if(printf("hello world")==-1){exit(1);} But you break common standards by not doing such verbose, and usually useless coding. Well what if you had a wrapper around the libc? like so you could do something like.. //main... error_catch...