Full typing with TypeScript and ASP.Net WebApi

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Is there any approaches to auto-generate OpenAPI/Swagger metadata for WebApi methods or maybe even to generate client typescript models?

I found Swashbuckle and Swagger to JS & Typescript Codegen to be nice but I wonder to find out any other libs.

It would be perfect if you can give pros and cons of each approach.

You can also check out NSwag, a Swagger toolchain for .NET and TypeScript.

The tool generates Swagger specs from existing Web API controllers and client code based on these Swagger specs. You can generate TypeScript client code for JQuery with Callbacks or Promises, AngularJS or Angular2. The generated DTOs (request/response types) can either be interfaces or classes (with date conversion, lower camel casing, etc..)

The project can be used with a simple to use desktop GUI, build scripts or a command line tool.

Disclaimer: I'm one of the contributors of NSwag.

Generate TypeScript Client API for ASP.NET Web API, Generate strongly typed client API in TypeScript for ASP. NET Core Web API, Strongly Typed Client API Generators generate strongly typed client API in C# codes [Full code examples for data models and ApiController]. On the way to full typing with TypeScript, Swashbuckle, and AutoRest Introduction. The article is devoted to the question of implementing exchange of typed messages between Back-End based on ASP.NET Web API and Front-End created with the use of TypeScript. It is important for the teams working on big projects, especially for the distributed ones.

Please try Swagger-Codegen, which is a free and open-source code generator to generate REST API clients (e.g. C#, TypeScript, Javascript and more) or server stubs (ASP.NET5) given an OpenAPI/Swagger spec.

Here is a good starting point: https://github.com/swagger-api/swagger-codegen#getting-started

For typescript, Swagger Codegen supports different libraries: typescript-node, typescript-angular, typescript-angular2 and typescript-fetch

ASP.NET Web API, Angular2, TypeScript and WebApiClientGen , ASP.NET Web API, Angular2, TypeScript and WebApiClientGen typed data and functions in both the server side and the client sides. TypeScriptNG2Folder " is an absolute path or relative path to the Angular2 project. Use ASP.NET Core SignalR with TypeScript and Webpack. 02/10/2020; 21 minutes to read +11; In this article. By Sébastien Sougnez and Scott Addie. Webpack enables developers to bundle and build the client-side resources of a web app. This tutorial demonstrates using Webpack in an ASP.NET Core SignalR web app whose client is written in TypeScript.

Ultimately you want TypeScript models, not Swagger meta data. ASP.NET Web API Client Generators may be more handy, less overhead than swagger toolchain during SDLC.

While programmers generally use WebApiClientGen to generate client API codes, this project also provides POCO2TS.exe, a command line program that generates TypsScript interfaces from POCO classes. You may use either Poco2ts.exe or the poco2ts component to integrate the code generation with your build pipeline.

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openapi client generator for typescript

npm install @cblx.br/openapi-typescript --save-dev

create an openapi-typescript.config.js

var config = {
    url: "<url>/swagger.json",
    outputDir: "./src/client",

module.exports = config;

execute it:

npx openapi-typescript

Angular example:

create an app-connector.ts

import { Injectable, Inject } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { OpenApiConnector } from '@cblx.br/openapi-typescript';

    providedIn: 'root'
export class AppConnector implements OpenApiConnector {

    constructor(@Inject('BASE_URL') private baseUrl: string, private http: HttpClient) {}

    async request(method: string, path: string, parameters: any, body: any) {
        return await this.http.request(method, this.baseUrl + path, {
            body: body,
            params: parameters


var config = {
    url: "<url>/swagger.json",
    outputDir: "./src/client",
     events: {
        beforeWriteServiceClass: () => {
            var content = '';
            content += `import { Inject, Injectable } from '@angular/core';\n`;
            content += `import { AppConnector } from 'app/app-connector';\n`;
            content += `@Injectable({ providedIn: 'root' })\n`;
            return content;
        createConnectorDecorator: () => {
            return `@Inject(AppConnector) `;

module.exports = config;

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