Category javascript

Using EF Core and SQLite to persist SignalR Group messages in ASP.NET Core

The article shows how SignalR messages can be saved to a database using EF Core and SQLite. The post uses the SignalR Hub created in this blog; SignalR Group messages with ngrx and Angular, and extends it so that users can only join an existing SignalR group. The group history is then sent to the […]

Auto redirect to an STS server in an Angular app using oidc Implicit Flow

This article shows how to implement an auto redirect in an Angular application, if using the OIDC Implicit Flow with an STS server. When a user opens the application, it is sometimes required that the user is automatically redirected to the login page on the STS server. This can be tricky to implement, as you […]

Angular search with ASP.NET Core and Elasticsearch

This article shows how a website search could be implemented using Angular, ASP.NET Core and Elasticsearch. Most users expect autocomplete and a flexible search like some of known search websites. When the user enters a char in the search input field, an autocomplete using a shingle token filter with a terms aggregation used to suggest […]

Using SASS with Webpack, Angular and Visual Studio

This post shows how to use SASS with Webpack and Angular 2 in Visual Studio. I had various problems trying to get this to work from Visual Studio using a Webpack build. The following is a solution which works, but not the only one. Code: 2017.02.08: Updated webpack 2.2.1, angular 2.4.6 2017.01.07: Updated webpack […]

IdentityServer4, Web API and Angular in a single ASP.NET Core project

This article shows how IdentityServer4 with Identity, a data Web API, and an Angular SPA could be setup inside a single ASP.NET Core project. The application uses the OpenID Connect Implicit Flow with reference tokens to access the API. The Angular application uses webpack to build. Code: History: 2017-08-15: Updated ASP.NET Core 2.0, Angular […]

Creating an Angular Component for Plotly

This article shows how the Plotly javascript library can be used inside an Angular 2 Component. The Angular 2 component can then be used anywhere inside an application using only the Angular Component selector. The data used for the chart is provided in an ASP.NET Core MVC application using Elasticsearch. Code: 2017.02.07: Updated Updated […]

Secure file download using IdentityServer4, Angular2 and ASP.NET Core

This article shows how a secure file download can be implemented using Angular 2 with an OpenID Connect Implicit Flow using IdentityServer4. The resource server needs to process the access token in the query string and the NuGet package IdentityServer4.AccessTokenValidation makes it very easy to support this. The default security implementation jwtBearerHandler reads the token […]