Access Control Allow Origin issue in Angular 2

Question

I have a problem with getting data from my node.js server.

The client side is:

    public getTestLines() : Observable {
    let hea         


        

Answer 1

This has nothing to do with the client. Very simply you can solve this problem by adding Cors to the Configure method. like this:

public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            InitializeDatabase(app);

            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }

            app.UseMiddleware();

            app.UseSwagger();

            app.UseSwaggerUI(c =>
            {
                c.SwaggerEndpoint("/swagger/v1/swagger.json", "My API V1");
            });

            app.UseCors(s => s.AllowAnyOrigin().AllowAnyMethod().AllowAnyHeader());  ==> This section

            app.UseMvc();
        }

Now Restart your project and check again.