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How to create Web API project to retrieve Sharepoint Online list and result in JSON format

THM THM 1 Reputation point
2020-12-13T05:43:34.983+00:00

Hi I am new to API project with Sharepoint Online (MFA) to retrieve list items and result in JSON format. I want to ensure i am on the right track by using either WebAPI or Webservices in Visual Studio. or any other suggestions?

Is there an project example with a step by step reference ?

Thank you.

SharePoint
SharePoint
A group of Microsoft Products and technologies used for sharing and managing content, knowledge, and applications.
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An object-oriented and type-safe programming language that has its roots in the C family of languages and includes support for component-oriented programming.
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ASP.NET API
ASP.NET API
ASP.NET: A set of technologies in the .NET Framework for building web applications and XML web services.API: A software intermediary that allows two applications to interact with each other.
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  1. Jerryzy 10,571 Reputation points
    2020-12-14T05:51:31.897+00:00

    Hi @THM THM ,

    For SharePoint Online MFA enabled Tenant, it's suggested to use App-Only authentication with CSOM code to connect with SharePoint Online list:

    Connect To SharePoint Online Site With App Only Authentication

    For building the custom web API to connecting with SharePoint Online, here is a complete example for start:

    Building a Custom Web API for use with SharePoint Online

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