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Questions tagged [asp.net-web-api-odata]

ASP.NET 4.x Implementation of OData Services that supports both v3-v4 of the OData Protocol. DO NOT use this tag for [asp.net-core] related questions! Use this tag if your question directly relates to the ASP.NET server-side implementation of OData services, but also include the version specific tag [odata-v3] or [odata-v4]. Only include the non-specific [odata] tag if the question has broader client-side implications.

The ASP.NET Web API OData package offers support for the OData protocol in ASP.NET Web API.

OData is a standard protocol for creating and consuming data. The purpose of OData is to provide a protocol that is based on Representational State Transfer (REST) for create, read, update, and delete (CRUD) operations. OData applies web technologies such as HTTP and JavaScript Object Notation (JSON) to provide unified convention based access to information from various programs. OData provides the following benefits:

  • It lets developers interact with data by using RESTful web services.
  • It provides a simple and uniform way to share data in a discoverable manner.
  • It enables broad integration across products.
  • It enables integration by using the HTTP protocol stack.

Two key defining features of OData over traditional RESTful APIs are the URL conventions that make it possible to compose queries that request only the specific fields and navigation links from resources that are needed on the client as well as the ability to partially update resources using the PATCH HTTP verb.

  • Together these features allow individual clients to reduce the data sent across the wire without needing changes in the API or data schema to support this.

ASP.NET Web API supports both Version 3 and Version 4 of the OData protocol.
Learn more about ASP.NET Web API OData on MSDN

The code from this package to implement this protocol makes heavy use of Language Integrated Query (LINQ) expressions to support deferred execution of client requests, in a sense the ODataLib translates a specific set of URL queries into LINQ queries.

While not required, the ASP.NET implementation has extensive support for using Entity-Framework to access the data layer, reducing the code necessary to expose EF data schemas as OData resources. For this reason Posts on SO related to this tag will often include EF references and concepts.

You can also find more information on:

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JayData incorrect behaviour with WebApi v2 Odata during entity Create with kendoGrid

this my Controller: public class ProductEntityController : EntitySetController< ProductEntity, int> { public IQueryable< ProductEntity> Get(ODataQueryOptions< ProductEntity> parameters) { return…
maryam
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What version of oData does WebAPI 1 support?

What version of oData does WebAPI 1 support? It's a bit tricky to search for as there is now a wealth of information for WebAPI 2.
Alex KeySmith
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ASP.NET OData with custom IQueryable and IQueryProvider

I am trying to apply additional server-side filtering to entities exposed by an asp.net OData service, using Linq to Entities. So far so good, but the Linq query that I build for the filter can sometimes get to an enormous length, causing a…
Johan Hirsch
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EntityFramework Model-First metadata for breezejs

Breeze.js library requires metadata of the entity context. Web API OData has a default ODataConventionModelBuilder for this operation, but doesn't work for Breeze, since it lacks foreign key information. Thus, Breeze offers a special package called…
coni2k
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How to configure odata web api route for method that always returns single entity

I'd like to configure a route that always returns a single entity. The controller looks like: class StatsController: ODataController { public Stats Get() { return new Stats(); } } The url to access it should be: GET…
Oleg D.
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Jaydata update not working correctly for webapi v2 odata

I have initialized a jaydata context: $data.initService('/odata/$metadata', { dataServiceVersion: '3.0' }).then(function (context) { if (!mycontext) mycontext= context; //this is a hack mycontext.prepareRequest = function (r) { …
CoffeeCode
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JayData incorrect behaviour with WebApi v2 Odata during entity update the Patch endpoint get invoked

While trying to update the entity, JayData triggers the PatchEntity method on the WepAPI backend. I find this as an invalid behaviour as for the UpdateEntity should be invoked. The add and delete entity functionality works OK. On the backend I have…
CoffeeCode
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Prevent entity being returned by OData $extend behaviour

In my entity model I've got loads of entities that link to the user that created them. Here's a simple example... public partial class JobNote { public int Id { get; set; } public int JobId { get; set; } public string Note { get; set; } …
BenCr
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OData: how to implement @odata.bind to insert foreign key value to a table from .NET 6 using C#

In Postman I can POST request successfully with this raw data: { "relatedContact@odata.bind": "Contacts(3b36c706-6a6c-414f-8f5f-ed24fc9a5aa2)", "stringName": "Shrek Rattle" } This will insert 3b36c706-6a6c-414f-8f5f-ed24fc9a5aa2 into…
Don Go
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How to cast SelectExpandQueryOption to IQueryable when using OData in WebAPI?

I have a WebAPI that is written in C# on the top of ASP.NET Core/5 framework. I enabled odata for my API. I am trying to manually apply the odata filter, order by clause, select columns and the expands. Here is how I am trying to manually build the…
Jay
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How to test the patch odata webapi method with Delta which has some collection properties

I need to test the following Patch method in my test project. public async Task PatchMarkAsReadAlertResults([FromODataUri] Guid key, Delta result) { await…
sundar rajan
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Coding my WebApiConfig.cs for a Database First oData Endpoint Service

I am building a Web API service that will generate oData. I'm using a "Database First" approach in that I've created an EDM in my "Models" folder containing a view. I had Visual Studio scaffold a Controller for me based on the EDM. Now I'm…
ShowJX1990
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How to convert GZipStream to HttpContent?

I have written a Web API code to return a zip file. But I am not able to convert the GZipStream content to HttpContent. I get the following error: cannot implicitly convert type 'system.io.compression.GZipStream' to …
Md Aslam
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Using Odata enabled ASP.NET Web-API to call a Stored Procedure

All, Looking for guidance on exposing a Stored Procedure using OData. I'm modifying an existing WEB-API app that already exposes OData. It currently exposes tables and views from SQL SERVER, and now I'm required to have it also expose Stored…
Bill Roberts
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Newbie on webapi odata

Vendor asks to expose a rest api as odata, trying to understand how it works in odata world, my assumption is the data model present themselves as entities, which then enables filter by query string, but how would a odata query work on a relational…
TOMMY WANG
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