How to Create a Web API App using ASP.NET Core with App Insights

In this post, we will look at how to create an ASP.NET Core Web Application and host it in Azure with Application Insights. First, let’s open Visual Studio and create a new ASP.NET Core Web Application project: Give the project a name: And select API as the type: We see the project in VS below: Press F5 to run the app. Click Yes if you see the message below: And click … Continue reading How to Create a Web API App using ASP.NET Core with App Insights

How to Install Postman for Windows

The Postman Chrome extension is being deprecated and replaced with Postman for Windows. To install it, head over to https://www.getpostman.com/downloads/ and click Download: We will download the Windows 64-bit app. Click to open the exe: From here, the Windows app will install and open:  

Using the Developer Portal (Legacy) in Azure API Management

In this post, we will look at the Developer Portal (Legacy) for Azure API Management. Browse to your APIM in Azure and click on the link: On selecting this, we get to a developer portal: We see our APIs. Select one: We see our operations. Select one and click Try It: We can select a Subscription Key and click Send to send a request: We get a 200 Response back. … Continue reading Using the Developer Portal (Legacy) in Azure API Management

Using Products in Azure API Management

In this post, we will look at using Products in API Management. Products let you “group APIs, define terms of use, and runtime policies”. To use products, go to APIM and select Products: We see 2 products – Starter and Unlimited: If we open Starter, we see this product has a rate limit of 5 calls per 60 seconds: The Unlimited policy does not contain this: Let’s create a new … Continue reading Using Products in Azure API Management

Using Postman to Hit an API Management Endpoint with Subscription

In our previous posts, we created an App Service and an API Management in Azure. Let’s now use Postman to send a request to the Azure API Management endpoint. Go to the APIM and select the API. Under Settings, copy the Base URL: Now, in our case, we have /api/Customers to get all customers: So our URL is https://crmdevapim.azure-api.net/api/customers. Let’s open Postman and create this request. Click Send: We get a … Continue reading Using Postman to Hit an API Management Endpoint with Subscription

Backend service URL is not defined in Azure App Service

In this post, we will look at the error “Backend service URL is not defined” when making a request to an ASP.NET Web API through API Management. I have a .NET Core Web Api with Swashbuckle / Swagger. The Web Api is published to an Azure App Service, and an Azure API Management has this API loaded. We can run a test message using the APIM: We get a 500 … Continue reading Backend service URL is not defined in Azure App Service

Adding Swagger OpenAPI to an ASP.NET Web API

In this post, we will add Swagger OpenAPI to an ASP.NET Web API project. Swagger OpenAPI is a way to document the capabilities of your API. We can do this in .NET by adding the Swashbuckle NuGet package. Let’s continue with our Web Api project we created earlier. We will open the project in Visual Studio and add the Swashbuckle.AspNetCore package: Click OK: Now open Startup.cs and go to ConfigureServices: We … Continue reading Adding Swagger OpenAPI to an ASP.NET Web API

How to Add API Management (APIM) to an Azure App Service

In this post, we will look at how to add Azure API Management (APIM) to an Azure App Service. We will follow on from our previous post where we created an Azure App Service. There are a couple of ways to create an APIM. First, browse out to your App Service. We will use the one we created earlier using ASP.NET Core. Under API, select API Management: Click Create New: … Continue reading How to Add API Management (APIM) to an Azure App Service

HttpClient GetAsync, PostAsync, SendAsync in C#

HttpClient is a library in the Microsoft .NET framework 4+ that is used for GET and POST requests. Let’s go through a simple example of using HttpClient to GET and POST JSON from a web application. First, we will create our client application. We will create a new console app in Visual Studio: Add the System.Net.Http namespace. We will pull down JSON data from a REST service: Now, to read this, we … Continue reading HttpClient GetAsync, PostAsync, SendAsync in C#