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If you are not familiar with the Visual Studio Code Snippets, and want to learn how to use them, you can refer to the appendix from this document ' Appendix C: Using Code Snippets'.

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Microsoft Visual Studio Express 2012 for Web or superior (read Appendix A for instructions on how to install it).įor convenience, much of the code you will be managing along this lab is available as Visual Studio code snippets.

You must have the following items to complete this lab:

Implement asynchronous page processing in Web Forms.

Take advantage of unobtrusive client-side validation with jQuery in Web Forms.

Use Data Annotations for user input validation.

Use value providers for mapping page data to code-behind methods.

Use new model binding features in Web Forms.

Use strongly-typed data-binding expressions.

In this hands-on lab, you will learn how to: In the official ASP.NET portal you can find more examples of the new features in ASP.NET WebForms 4.5: What's New in ASP.NET 4.5 and Visual Studio 2012Īll sample code and snippets are included in the Web Camps Training Kit, available at.

The UpdatePanel control has been fixed to support posting HTML5 input fields.

As a result, you can use ASP.NET conventions in URL paths, like the ~ operator to represent the application root (for example, ).

New HTML5 elements that have attributes that represent a URL now support runat='server'.

Validator controls now support validating HTML5 input elements.

The FileUpload control now supports multiple file uploads from browsers that support this HTML5 feature.

The TextMode property of the TextBox control has been updated to support the new HTML5 input types like email, datetime, and so on.

Some improvements have been made to Web Forms server controls to take advantage of new features of HTML5: In the request validation area, improvements have been made to make it easier to selectively turn off request validation for specific parts of your applications or read invalidated request data. Client-side validation in Web Forms is now integrated with jQuery, providing cleaner client-side code and unobtrusive JavaScript features. You can now annotate your model classes with validation attributes from the namespace and request that all your site controls validate user input using that information. Validating user input should also be easier with the latest version of Web Forms.

Additionally, model binding capabilities have been added to ASP.NET, which means you can map data from the page directly into method type parameters. With the data-bound controls, you can now also specify your own custom methods for selecting, updating, deleting and inserting data, simplifying the interaction between the page controls and your application logic.

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Setting this property will enable you to use a strongly-typed variable to receive the full benefits of the Visual Studio development experience, such as IntelliSense, member navigation, and compile-time checking. In the new version of ASP.NET, you are able to declare what type of data a control is going to be bound to by using a new ItemType property. In previous versions of Web Forms, when using data-binding to emit the value of an object member, you used the data-binding expressions Bind() or Eval(). The new version of ASP.NET Web Forms introduces a number of improvements focused on improving user experience when working with data.