Download PDF by Deepak Vohra: Ajax in Oracle JDeveloper

By Deepak Vohra

ISBN-10: 3540775951

ISBN-13: 9783540775959

ISBN-10: 354077596X

ISBN-13: 9783540775966

Asynchronous JavaScript and XML (Ajax) is an internet process used to move information among a browser and server asynchronously with no posting the internet web page to the server. "Asynchronously" signifies that the processing of the internet web page maintains whereas the Ajax request is distributed to the server and a reaction is bought from the server. the net web page, or section(s) of the internet web page, is refreshed with the Ajax reaction with out reposting the net web page. Ajax has the subsequent benefits over non-Ajax internet applications.

- diminished reaction time and diminished server load, because the whole web content isn't really reposted.

- diminished bandwidth of internet purposes as in basic terms info is transferred and the HTML layout is utilized within the browser.

- Separation of information, structure and elegance.

The publication covers net seek and RSS Feed with Ajax in addition to shape validation with Ajax frameworks for Java, JSP, JSF, and personal home page. It discusses utilizing Ajax in Oracle JDeveloper and is IDE established. JDeveloper has the subsequent merits over Eclipse IDE.

- JDeveloper 11g offers an built-in JavaScript Editor for Ajax/Web improvement.

- It additionally offers a Hypertext Preprocessor extension.

- JDeveloper has a integrated aid for JSF and for JDBC.

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Additional resources for Ajax in Oracle JDeveloper

Sample text

Start adding data to Catalog Id field. An XMLHttpRequest gets sent to the server to verify the validity of the data being added. If the Catalog Id field value is valid, a “Catalog Id is Valid” message gets displayed as shown in Fig. 14. Fig. 5 Processing an Ajax Response 41 An XMLHttpRequest request gets sent with each modification to the Catalog Id input field as shown in Fig. 15. Fig. 15 Dynamic Validation If a value is added that is already defined in the database, a “Catalog Id is not Valid” message gets displayed and the Submit button gets disabled as shown in Fig.

GetElementById(“validationMessage”); Replace the getElementById() function with prototype function $(). var validationMessage=$('validationMessage'); In the non-prototype version an XMLHttpRequest object is created with the XMLHttpRequest constructor or the ActiveXObject constructor. The callback method is registered with the XMLHttpRequest object and the HTTP request sent to the server. The callback method is invoked when the request state changes and when the request is complete the HTTP response is processed.

Fig. 15 Dynamic Validation If a value is added that is already defined in the database, a “Catalog Id is not Valid” message gets displayed and the Submit button gets disabled as shown in Fig. 16. 42 2 Developing an Ajax Web Application Fig. 16 Non-Valid Catalog Id Specify a Catalog Id field value that is valid and click on Create Catalog button to add a catalog entry as shown in Fig. 17. Fig. 5 Summary 43 The form gets posted to the server with POST method, because the method specified in

element is POST.

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Ajax in Oracle JDeveloper by Deepak Vohra

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