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 property's...

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 model, ...

Introduction JSON (aka, JavaScript Object Notation), a standard text-based format for representing structured data based on JavaScript object syntax, is the default representation for the OData requests and responses payload, see OData JSON format here. It’s a very popular format and widely used in most scenarios. However, there are customers who ...

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 ASP.NET Core ...

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 consume RES...

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, $compu...

Introduction In this post, I will create formatter extensions in an OData web service and request/response hooks in an OData client application to generate/consume ETag control information. ETag (aka entity tag), one of OData control information that may be applied to an entity or collection in response, can be used in a subsequent request to avoi...

Introduction API versioning can help evolving our APIs without changing or breaking the existing API services. URL segment, request header, and query string are three ways to achieve API versioning in ASP.NET Core application. ASP.NET Core OData 8, built upon ASP.NET Core, has the built-in API versioning functionality via route URL prefix templ...

Introduction Attribute routing is how Web API matches the incoming HTTP requests to an action based on route template attributes decorated on controller or action. ASP.NET Core defines a set of route template attributes to enable attribute routing, such as RouteAttribute, HttpGetAttribute etc. ASP.NET Core OData 8.0 RC supports these attributes to...

Introduction In the previous version of ASP.NET Core OData, such as 6.x and 7.x version, the OData routing is IRouter-based Web API Routing, that is, OData router is a Router implementing IRouter interface. Even in the ASP.NET Core OData 7.x Endpoint Routing, it is also related to the IRouter routing. Since 8.0, we want to build the OData routing ...