Unchase.OpenAPI.Connectedservice
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:scroll: Visual Studio extension to generate OpenAPI (Swagger) web service reference.

Unchase OpenAPI (Swagger) Connected Service is a Visual Studio 2017/2019/2022 extension to generate C# (TypeScript) HttpClient (or C# Controllers) code for OpenAPI (formerly Swagger API) web service with NSwag.
Starting from Visual Studio Community 2019 v16.1.3 extensions based on
Microsoft Connected Servicesnow work fine.
The project is developed and maintained by Nikolay Chebotov (Unchase).
Getting Started
Read How-To on medium.com
Install from Tools -> Extensions and Updates menu inside Visual Studio 2017 (for VisualStudio 2019: Extensions -> Manage Extensions) or download as VSIX package from VSGallery or download as VSIX package from Visual Studio Marketplace:

Builds status
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| GitHub Release | |
| GitHub Release Date | |
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| VS Marketplace | |
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Features
- Generate
C#orTypeScriptclients/proxies (client code) from Swagger 2.0 and OpenAPI 3.0 specifications - Generate
C#ASP.NET Controller from Swagger 2.0 and OpenAPI 3.0 specifications - Experimental: Generate
C#orTypeScriptclients/proxies (client code) or ASP.NET Controller from OData specification converted to OpenAPI based on OpenAPI.NET.OData - Generate
.nswagfile for using inNSwagStudio(no need to install for generating) - Add required dependencies for the
C#client (before generating):- Library targeting .NET Standard 1.4+:
- Library targeting the full .NET:
- Newtonsoft.Json (NuGet)
- System.Runtime.Serialization (GAC)
- System.ComponentModel.DataAnnotations (GAC)
- Library targeting PCL 259 (Portable Class Library):
- Add Required dependences for the
C#controller (before generating):- Microsoft.AspNetCore.Mvc (NuGet)
- Command to open generated
.nswagand.nswag.jsonfiles in NSWagStudio - Command to compare
.nswag.jsonspecification file with another.nswag.jsonspecification file (or specification given byendpoint) - Storage of the last 10 endpoints (specification path)
Settings Meaning
Meaning of the Unchase OpenAPI (Swagger) Connected Service settings according to NSwagStudio:

Exclude type names
Since v1.4.0 you can exclude type names in separate Window for C# client code generation:

Generate code from OData specification converted to OpenAPI specification
Since v1.5.0 you can generate code from OData specification converted to OpenAPI specification:

Custom Commands
Open in NSwagStudio Command
Since v1.1.* have been added menu command embedded in Visual Studio Solution Explorer context menu lets you open generated .nswag and .nswag.json files in NSwagStudio.
This extension is for those times where you generate .nswag and .nswag.json files and you want to be able to quickly open it in NSwagStudio.
Prerequisite
In order to use this extension, you must have Visual Studio 2017/2019, this connected service as well as NSwagStudio installed.
Solution Explorer
You can open .nswag and .nswag.json files in NSWagStudio by simply right-clicking it in Solution Explorer and select Open in NSwagStudio:

Path to NSwagStudio.exe
If you installed NSwagStudio at a non-default location, a prompt will ask for the path to NSwagStudio.exe.
You can always change the location in Tools -> Options -> Web -> Unchase OpenAPI (Swagger) Connected Service:
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Compare OpenAPI-specifications... Command
Since v1.2.* have been added menu command embedded in Visual Studio Solution Explorer context menu lets you compare generated .nswag.json specification-file with another .nswag.json specification-file (or with specification given by endpoint).
This extension is for those times where you generate .nswag.json file and you want to quickly compare it with another specification or specification given by endpoint.
Prerequisite
In order to use this extension, you must have Visual Studio 2017/2019 as well as this connected service.
Solution Explorer
You can compare .nswag.json specification-file with another .nswag.json specification-file (or with specification given by endpoint) by simply selecting one or two files and right-clicking them in Solution Explorer and select Compare OpenAPI-specifications...:

Path to the specification Endpoint
You can always change the specification Endpoint to compare with in Tools -> Options -> Web -> Unchase OpenAPI (Swagger) Connected Service:
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Compare View

HowTos
- [ ] Add HowTos in a future
- [ ] ... request for HowTo you need
Troubleshooting
Can't open .nswag file in NSwagStudio
- You can use Open in NSwagStudio menu command
- If generated code corrupted, try to open
.nswagfile inNSwagStudio(Windows GUI for editing .*nswag files) - If it doesn't open, try to create new
.nswagfile inNSwagStudiofor the same API service link and check the differences
Installation completes but I can't see the Service in the list of connected services (Visual Studio 2019)
- Relevant bug report.
Connected Servicesrestored in the v16.1.3 update to Visual Studio 2019.
Roadmap
See the changelog for the further development plans and version history.
Feedback
Please feel free to add your review, request a feature, ask a question or report a bug including in connected service:

Thank you in advance!
Thank me!
If you like what I am doing and you would like to thank me, please consider:
Thank you for your support!
Copyright © 2019 Nikolay Chebotov (Unchase) - Provided under the Apache License 2.0.
