Simple AJAX implementation for ASP. NET Web applications. The article describes a simple approach of implementing AJAX functionality in ASP. NET web applications. Introduction. This document describes a simple approach of implementing AJAX functionality in ASP. NET web applications. Pros and cons of using AJAX are also discussed. The document contains a working Java. Script and C#. NET code demonstrating the suggested solution. Eliot Jones -.NET Developer and Programmer. Our first simple Ajax call. Go to the Next Post to find out about using PartialViews and Ajax Forms. Simple AJAX implementation for ASP.NET Web applications. This document describes a simple approach of implementing AJAX functionality in ASP.NET web applications. Pros and cons of using AJAX are also discussed. Simple Ajax Example, Developing Simple Ajax application. Ajax is the method of using JavaScript to send the client data on the server and then retrieve it without refreshing the complete page. Why AJAXMost of you already know that AJAX stands for Asynchronous Java. Script and XML. This technology was introduced first by Microsoft (from my best knowledge) back in 1. DHTML / Java. Script web application with remote calls”. The whole idea of the technology was to allow an internet browser to make an asynchronous HTTP call to remote pages/services, and update a current web page with the received results without refreshing the whole page. By creators’ opinion, this should have improved customers’ experience, making HTTP pages look and feel very similar to Windows applications. Because the core implementation of this technology was based on internet browser functionality, the usability was very limited at that time. But several years later, the technology has been reborn with new browsers support and massive implementation by such giants as Google, Amazon. Bay, etc. Today, it’s known as AJAX, and considered as a natural part of any dynamic web page with advanced user experience. Solution Description. The suggested approach provides a very simple, yet effective implementation of the AJAX functionality. It’s very easy to maintain and change, does not require any special skills from developers, and, from our best knowledge, is cross- browser compatible. Basically, a regular AJAX- like implementation includes two main components: a client HTML page with Java. Script code making an AJAX call and receiving a response, and a remote page that can accept a request and respond with the required information. The Java. Script code on the client page is responsible for instantiating an Xml. Http object, then providing this object with a callback method which will be responsible for processing the received information, and finally, sending a request to the remote page via the Xml. Http object. All this is done by the Java. Script code. Our approach is intended for use in ASP. NET applications, and considers the following possible scenarios: AJAX calls may be performed on different ASP. NET pages of the web application to different remote pages. A remote page URL may contain dynamically calculated parameters, and it may be more convenient to build a URL string in the code- behind of the ASP. NET page. A remote page may respond with a complex data requiring parsing before updating an HTML page, that once again may be done in the code- behind of the ASP. NET page. A remote page may be either an external third party page, or the web application’s own page or service. All these considerations are illustrated by the diagram below: Implementation. I divided all the Java. Script methods into two parts: calling page specific Java. Script methods, and AJAX Java. Script methods common for all the calling pages. Specific methods include a callback method as well, as it is responsible for updating the page content. Common AJAX methods are responsible for instantiating an Xml. Http object and sending an asynchronous request to the remote page. Getting an Xml. Http object differs depending on the type of the browser. So now first of all download xampp server software and install it in your machine; After installing the xampp server just open your XAMPP control panel from start menu -> All Program -> XAMPP -> XAMPP control menu as shown in. AJAX made simple with DWR. Create an anonymous authentication module. A Google Maps mash-up. This number is updated—using AJAX—as the user selects the amount of desired bedrooms and bathrooms, and the. Adam Khoury 369,596 views. 16:10 jQuery Ajax Tutorial #1 - Using AJAX & API's (jQuery Tutorial. I distinguish two basic types: a Microsoft browser which is one of the IE family, and a Mozilla browser which is one of Mozilla Firefox, Netscape, or Safari. I tested the code with the Opera browser too, but I would not guarantee that it will always be working well. Get. Xml. Http. Object(handler). Correspondingly, the simplified revision of the Get. MSXml. Http method may look as follows: function Get. MSXml. Http() . Now that we already have an Xml. Http object, we can send an asynchronous request. Send. Xml. Http. Request(xmlhttp, url) . In order to do this, we need to pass the callback method name to the Get. Xml. Http. Object method and then pass the URL string to the Send. Xml. Http. Request method. Http. function Execute. Call(url). . In our example, it simply updates the inner HTML of the given HTTP element. But in real life, it can be much more complex. The last question regarding the calling page implementation is how we call the Execute. Call JS method. Well, it depends on what the page is doing. In some cases, the Execute. Call method can be called when the JS event is fired. How to Program in Ajax. Some basic knowledge of HTML, DOM. Prepare a picture for writing an Ajax program. But if that is not the case, we can register the method as a startup script for the page using the corresponding C# code in the page's code- behind. Page. Register. Startup. Script(. If this is an ASP. NET page (what we assume), we are interested in the code- behind only. We can easily remove all the code from the . For example, we take a public web service that converts temperature values in Celsius to Fahrenheit and vice versa. The service is available here. If you add this URL as a web reference to your project, Visual Studio will generate a proxy class with the name com. ITemp. Converterservice in your current namespace. Our remote ASP. NET page, let’s name it get. Temp. aspx, will accept a query string parameter with the name “temp” which should contain an integer value of a temperature in Celsius to convert. So the target URL to the remote page will look like this: http: //localhost/get. Temp. aspx? temp=2. And the code- behind for this page is shown below: privatevoid Page. In simple cases when the response contains just text, we can pass the remote service URL directly to the JS Execute. Call method. This article is aimed to illustrate the simplicity of using the AJAX technology in any ASP. NET application. While AJAX has some drawbacks, it also provides some advantages from the user experience perspective. It’s completely up to the developer whether to use the AJAX technology or not, but I have just demonstrated that in simple cases, it does not take a long time or require any special skills. Credits. I would like to thank my colleagues Oleg Gorchkov and Chris Page who helped me out with testing and optimizing the approach described in the article. Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages. Using AJAX to developed simple application in ASP. NET MVCIntroduction: In this application we using AJAX in ASP. NET MVC. Now in this. Updated status Information using ASP. NET MVC. An XMLHttp. Request object is used to to exchange data asynchronously with a server. AJAX allows web. pages to be updated asynchronously by exchanging small amounts of data with the. This means that it is possible to update parts of a. CSS is used to set style the data. XML is used as the format for transferring data. Now we know that. ASP. NET MVC framework was designed to enable you to write good software. Step. 1: Open Visual Studio 2. Go to file - > New- > Projects. Create an ASP. NET MVC 2 Web Application. The name of the application is.
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