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Code samples for Office Add-in development on the Microsoft 365 platform.

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Office Add-ins code samples

Office Add-ins code samples are provided in this repo to help you learn, study, and build great Office Add-ins!

Getting started

The following samples show how to build the simplest Office Add-in with only a manifest, HTML web page, and a logo. They will help you understand the fundamental parts of an Office Add-in. For additional getting started information, see our quick starts and tutorials.

Completed tutorials

The following sample is the completed version of the Excel add-in tutorial.

Name Description
Tutorial: Create an Excel task pane add-in This sample shows how to create an Excel add-in with a task pane and command ribbon buttons. The add-in shows how to create and sort a table, make a chart, freeze a row, protect a worksheet, and display a dialog box.

Blazor WebAssembly

Name Description
Create a Blazor WebAssembly Excel add-in Uses .NET Blazor technologies to build an Excel add-in.
Create a Blazor WebAssembly Word add-in Uses .NET Blazor technologies to build a Word add-in.
Create a Blazor WebAssembly Outlook add-in Uses .NET Blazor technologies to build an Outlook add-in.

Auth, Identity and Single Sign-on (SSO)

All of the following samples show how to access and work with a user's Microsoft Graph data using the Microsoft identity platform.

Host Auth approach Platform Name
Outlook add-in SSO ASP.NET server Use SSO in an Outlook Add-in with ASP.NET
Office Add-in SSO ASP.NET server Use SSO in an Office Add-in with ASP.NET
Excel add-in SSO Node.js server Use SSO in an Office Add-in with Node.js
Excel add-in MSAL React SPA Use MSAL.js for auth and Microsoft Graph in an Excel add-in
Excel add-in MSAL ASP.NET server Use MSAL.NET for auth and Microsoft Graph in an Excel add-in
Outlook add-in MSAL ASP.NET server Use MSAL.NET for auth and Microsoft Graph in an Outlook add-in

Office

Name Description
Save custom settings in your Office Add-in Shows how to save custom settings inside an Office Add-in. The add-in stores data as key/value pairs, using the JavaScript API for Office property bag, browser cookies, web storage (localStorage and sessionStorage), or by storing the data in a hidden div in the document.

Outlook

Name Description
Use Outlook event-based activation to encrypt attachments, process meeting request attendees and react to appointment date/time changes Shows how to use event-based activation to encrypt attachments when added by the user. Also shows event handling for recipients changed in a meeting request, and changes to the start or end date or time in a meeting request.
Use Outlook event-based activation to indicate external recipients Uses event-based activation to run an Outlook add-in when the user changes recipients while composing a message. The add-in also uses the appendOnSendAsync API to add a disclaimer.
Use Outlook event-based activation to set the signature Uses event-based activation to run an Outlook add-in when the user creates a new message or appointment.
Use Outlook Smart Alerts Uses Outlook Smart Alerts to verify that required color categories are applied to a new message or appointment before it's sent.

Excel

Name Description
Data types explorer (preview) Builds an Excel add-in that allows you to create and explore data types in your workbooks. Data types enable add-in developers to organize complex data structures as objects, such as formatted number values, web images, and entity values.
Open in Teams Creates a new Excel spreadsheet in Microsoft Teams containing data you define.
Insert an external Excel file and populate it with JSON data Insert an existing template from an external Excel file into the currently open Excel file. Then retrieve data from a JSON web service and populate the template for the customer.
Create custom contextual tabs on the ribbon This sample shows how to create a custom contextual tab on the ribbon in the Office UI. The sample creates a table, and when the user moves the focus inside the table, the custom tab is displayed. When the user moves outside the table, the custom tab is hidden.
Use keyboard shortcuts for Office add-in actions Shows how to set up a basic Excel add-in project that utilizes keyboard shortcuts.
Custom function sample using web worker Shows how to use web workers in custom functions to prevent blocking the UI of your Office Add-in.
Use storage techniques to access data from an Office Add-in when offline Demonstrates how you can implement localStorage to enable limited functionality for your Office Add-in when a user experiences lost connection.
Custom function batching pattern Batch multiple calls into a single call to reduce the number of network calls to a remote service.

Word

Name Description
Get, edit, and set OOXML content in a Word document with a Word add-in Shows how to get, edit, and set OOXML content in a Word document.
Load and write Open XML in your Word add-in Shows how to add a variety of rich content types to a Word document using the setSelectedDataAsync method with ooxml coercion type.

Shared JavaScript runtime

Check out these samples if you want to take advantage of the shared runtime for your Office Add-in.

Date Name Description
Share global data with a shared runtime Shows how to set up a basic project that uses the shared runtime to run code for ribbon buttons, task pane, and custom functions in a single browser runtime.
Manage ribbon and task pane UI, and run code on doc open Shows how to create contextual ribbon buttons that are enabled based on the state of your add-in.

Additional samples

Name Description
Use a shared library to migrate your Visual Studio Tools for Office add-in to an Office web add-in Provides a strategy for code reuse when migrating from VSTO Add-ins to Office Add-ins.
Integrate an Azure function with your Excel custom function Learn how to integrate Azure functions with custom functions to move to the cloud or integrate additional services.
Dynamic DPI code samples A collection of samples for handling DPI changes in COM, VSTO, and Office Add-ins.

Learn more

To learn more about Office Add-ins, see the Office Add-ins documentation.

Questions and feedback

  • Did you experience any problems with a sample? Create an issue and we'll help you out.
  • We'd love to get your feedback about the samples. Go to our Office samples survey to give feedback and suggest improvements.
  • For general questions about developing Office Add-ins, go to Microsoft Q&A using the office-js-dev tag.

Join the Microsoft 365 Developer Program

Get a free sandbox, tools, and other resources you need to build solutions for the Microsoft 365 platform.

Patterns and Practices community

Office Add-ins PnP is a community driven effort that helps developers extend, build, and provision customizations for the Office platform. The source is maintained on this GitHub repo where anyone can participate. You can provide contributions to the samples, reusable components, and documentation. Office Add-ins PnP is owned and coordinated by Office engineering teams, but the work is done by the community for the community.

Code of conduct

This project has adopted the Microsoft Open Source Code of Conduct. For more information see the Code of Conduct FAQ or contact opencode@microsoft.com with any additional questions or comments.

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