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Steps: Start Visual Studio, Click on File -> New Website -> Under Visual Studio Installed templates -> Select ASP.NET Ajax-Enabled Site. Enter a location & select OK. If using Visual Studio 2008 Web Developer Express Ajax comes along with it (so no need of a separate installation).Using Visual Studio Web Developer Express 2005 & versions above it, Ajax based applications may easily be created. Note that the Ajax Framework & Ajax Extensions should be installed (In case of VS 2005).
ASP.NET AJAX is a free framework to implement Ajax in asp.net web applications, for quickly creating efficient and interactive Web applications that work across all popular browsers. The Ajax Framework is powered with 1 - Reusable Ajax Controls 2 - Support for all modern browsers 3 - Access remote services and data from the browser without tons of complicated script.
The ScriptManager manages all ASP.NET AJAX resources on a page and renders the links for the ASP.NET AJAX client libraries, which lets you use AJAX functionality like PageMethods, UpdatePanels etc. It creates the PageRequestManager and Application objects, which are prominent in raising events during the client life cycle of an ASP.NET AJAX Web page. It also helps you create proxies to call web services asynchronously. The ScriptManager control (that we may drag on a web form) is actually an instance of the ScriptManager class that we put on a web page. The ScriptManager manages all the ASP.NET Ajax controls on a web page. Using ScriptManager class: 1 - All resources managing on a web page. 2 - Partial page updates 3 - Interact with UpdatePanel Control. 4 - Information Release whether. 5 - Provied Facility to access Web Services Method 6 - Providing access to ASP.NET authentication role.
1.If the network bandwidth is slow,end user confused because no page postback full running. 2.Distributed applications running Ajax will need a central mechanism for communicating with each other
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