ReadMe updated

Author: karthikeyan-live

README.md

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+This repository contains the excercise examples for the below mentioned video.<br/>
+https://www.youtube.com/watch?v=lGEPmY0bOws
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+Learn how to perform server-side CRUD operations in the React Data Grid using Fetch API and client-side events of React Grid. In this video, you will see how to create REST APIs using the Express server and call the endpoints to a custom service using the Fetch API. Finally, learn how to bind the custom service with the React Data Grid using the dataSourceChanged event.
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+To learn more about CRUD operations in the server side using AJAX, visit the following documentation.<br/>
+http://bit.ly/2R2TY3E
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+Server-side CRUD operations using DataManager video: http://bit.ly/2pWK2hf
+<br/>Getting Started sample: http://bit.ly/2ONRMKJ
+<br/>Server-side CRUD sample: http://bit.ly/34sNtuZ