OData

Create and consume RESTful APIs in a simple and standard way

Enable Un-typed within ASP.NET Core OData

June 19, 2023 Jun 19, 2023 06/19/23
Sam Xu
Introduction The latest ASP.NET Core OData supports the following two built-in OData abstract types: Developers can use them to advertise a property in OData metadata schema (aka, Edm model) so that such property is declared with a particular name present, but there is no type associated to describe the structure of the ...

Deep insert support in OData Web API

June 9, 2023 Jun 9, 2023 06/9/23
Kennedy Kangethe Munga
Background In OData Web API 7.7.0, we added support for deep insert. In deep insert, we create an object and its related items or link existing items in a single request. This blog post is a continuation of Bulk Operations Support in OData Web API. In that blog post, we explained how to use ODataAPIHandler and ODataAPIHandlerFactory ...

Enable CBOR within ASP.NET Core OData

March 14, 2023 Mar 14, 2023 03/14/23
Sam Xu
Introduction CBOR, which stands for Concise Binary Object Representation, is a data format whose design goals include the possibility of extremely small code size, small message size, and extensibility without the need for version negotiation (from cbor.io). CBOR is based on the wildly successful JSON (aka, JavaScript Object Notation) data ...

Bulk Operations Support in OData Web API

December 28, 2022 Dec 28, 2022 12/28/22
Elizabeth Okerio
Good news! OData Web API 7.x now supports bulk operations. Install the most recent version of OData Web API 7.x(v7.6.3) to take advantage of bulk operations. A bulk operation is one that allows you to perform multiple operations (insert, update, delete) on multiple resources (of the same type) and their nested resources (to any level) ...

Extension: Omit null value properties in ASP.NET Core OData

September 7, 2022 Sep 7, 2022 09/7/22
Sam Xu
Introduction By default, ASP.NET Core OData serializes a single value property as “null”, and a collection value property as an empty array if its value is null as such: It’s good for most scenarios. However, omitting those 'annoying' null-value properties from the OData response gets more and more attention. Along with the latest ...

Using the new JSON writer in OData

August 17, 2022 Aug 17, 2022 08/17/22
Clément Habinshuti
Microsoft.OData.Core version 7.12.2 has introduced a new JSON writer that’s based on .NET’s Utf8JsonWriter. The current JSON writer used in Microsoft.OData.Core, internally called JsonWriter, is a custom implementation that uses TextWriter to write the JSON output to the destination stream. We decided to write a new implementation to take ...
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Tutorial: Build gRPC & OData in ASP.NET Core

April 20, 2022 Apr 20, 2022 04/20/22
Sam Xu
Introduction gRPC (google Remote Procedure Call) is a high-performance remote procedure call framework that helps developers to build and consume remote services using the same way as calling local APIs. Different from gRPC, OData (Open Data Protocol) is an OASIS standard that defines a set of best practices for developers to build and ...

Customizing $filter for spatial data in ASP.NET Core OData 8

February 22, 2022 Feb 22, 2022 02/22/22
Kennedy Kangethe Munga
Background The OData URI parser parses the $filter query to a FilterClause. The FilterBinder translates an OData $filter parse tree represented by a FilterClause to an Expression. The Expression can be applied to an IQueryable and passed to an ORM (e.g Entity Framework Core) for processing. The FilterBinder contains the default ...
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$compute and $search in ASP.NET Core OData 8

January 11, 2022 Jan 11, 2022 01/11/22
Sam Xu
Introduction OData system query options, such as $filter, $orderby, are a set of query string parameters that control the amount and order of the data returned for the resource identified by the URL. In the latest version of ASP.NET Core OData, two new system query options as follows are enabled: Along with other query options, $...