Child updatepanel not updating

By doing so, you can inject an Update Panel between the control's children and the outside world if you determine the page supports partial rendering; otherwise, you can simply layer the child controls into a container instance.

The Update Panel operates as something of a black-box, wrapping ASP.

NET AJAX Extensions is the ability to do a partial or incremental page updates without doing a full postback to the server, with no code changes and minimal markup changes.

The advantages are extensive – the state of your multimedia (such as Adobe Flash or Windows Media) is unchanged, bandwidth costs are reduced, and the client does not experience the flicker usually associated with a postback. NET technology brings an object-oriented and event-driven programming model and unites it with the benefits of compiled code.

For more information, see the whitepaper, Globalization Support in ASP. Markup-Enabled Properties: control is the control that delimits the server-side content that will take part in the partial rendering functionality of the AJAX Extensions.

If you were to look at the rendered source of the page after clicking the button, it will confirm that in fact a post-back has not occurred - the original label text is still part of the source markup, and the label has changed through Java Script.

However, its server-side processing model has several drawbacks inherent in the technology: Enter Microsoft's ASP. AJAX, which stands for A synchronous J ava Script A nd X ML, is an integrated framework for providing incremental page updates via cross-platform Java Script, composed of server-side code comprising the Microsoft AJAX Framework, and a script component called the Microsoft AJAX Script Library. NET AJAX extensions also provide cross-platform support for accessing ASP. This whitepaper examines the partial page updates functionality of the ASP.

NET AJAX Extensions, which includes the Script Manager component, the Update Panel control, and the Update Progress control, and considers scenarios in which they should or should not be utilized.

Enabling partial rendering with this default page is as simple as revisiting Step 10 of this walkthrough and dropping controls onto the page.

Markup-Enabled Properties: Quite simply, the above script registers a callback with the client-side AJAX runtime for when the asynchronous request has been completed.

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