QuickBooks Online .NET Data Connector

A cross-platform, data connectivity library for connecting to QuickBooks Online in your .NET applications.

  • Import data from QuickBooks Online to analyze against data from other locations
  • Perform any operation against your accounting data, such as queries and updates
  • Quickly and easily display financial data or generate reports
  • Cross-platform .NET Standard support

The .NET QuickBooks Online data connector is part of ComponentOne Data Services.

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Why Choose ComponentOne DataConnectors?

Create Data-Oriented Apps Faster

Get fast and direct access to QuickBooks accounting services with less of the complexity through a unified interface for querying against all supported data sources.

Manage Data More Efficiently

Integrate financial data from QuickBooks Online into your custom applications without relying on additional software. This empowers end-users to manage data more efficiently and gain better insights.

Connect to OData from Any Platform

The DataConnectors library is built against .NET Standard from the ground up so it's supported across Windows, Mac, Linux, and mobile device platforms.

Visual Studio Integration

With full Visual Studio 2019 and Visual Studio 2022 integration, you can quickly and easily connect to your QuickBooks Online data sources. Connect to QuickBooks through the Server Explorer, without writing a single line of C# or VB.NET code, and then drag tables on the dataset designer, and connect data-aware controls like grids, charts and report designers.

Data Features

ADO.NET and Entity Framework Core Support

Connect to QuickBooks Online data using standard ADO.NET objects and Entity Framework Core. The data connector uses ADO.NET objects to make it easy to set up a connection.

OAuth Authentication Support

The QuickBooks data connector library supports the open standard authentication protocol, OAuth 2.0, to help you protect your data through a secure connection.

SQL and LINQ Query Support

Query against QuickBooks Online data using most standard SQL syntax including joins queries, functions, and summaries. It also has in-built support for LINQ queries for native .NET data queries.

Batch CRUD Operations

The data connectors support CRUD operations such as inserting, updating and deleting data through Command and DataAdapter objects. You can further optimize network performance by performing batch updates.

Fast Cache with Incremental Updates

With built-in caching you can improve performance by using a local cache database for repeat operations. It also supports incremental updates so that only new or modified records get synced to the cache.


With scaffolding support, the QuickBooks data connector library can generate model classes and a database context for Entity Framework Core. The scaffolding command can be run from Visual Studio.

Integrate QuickBooks Accounting Data in .NET

While the QuickBooks.NET C# data connector focuses primarily on connecting and querying, you can use it alongside other .NET Standard and .NET Framework components to do much more.

  • Integrate your accounting data with DataCollection to provide filtering, grouping, and data virtualization to your data-aware controls
  • Import data from QuickBooks Online to DataEngine to analyze massive amounts of data in fractions of a second
  • Connect QuickBook data to pivot grids & charts, such as FlexPivot, to analyze data visually
  • Create business reports using FlexReport and QuickBooks Online for essential business tasks
  • Display sales data from QuickBook in a .NET datagrid using the FlexGrid control in desktop, web, or mobile devices

QuickBooks Online .NET Demos

.NET QuickBooks Demo

Desktop DataConnectors Explorer

If you have a QuickBooks Online account you can explore it through our DataConnectors Explorer on Windows by downloading the desktop Demo Explorer.

.NET Google Analytics Demo

OLAP Invoice Report

See how to connect to various data sources, including QuickBooks, in this web demo for our cross-platform data connectivity library.