asp.net-core-3.0

Reference to this VisualStudioMagazine article, I am trying to have code in a separate file instead of razor view. I tried: @page "/Item" @using WebApplication1.Shared @using WebApplication1.Client.Services; @inject HttpClient Http @inherits ItemComponent @if (ItemList != null) { <table class="table"> <thead> <tr> <th>ID</th> <th>Name</th> <th>Category</th> <th>Metal</th> <th>Price</th> <th>Quantity</th> </tr> </thead> <tbody> @foreach (var item in ItemList) { <tr> <td>@item.ID</td> <td>@item.Name</td> <td>@item.Category</td> <td>@item.Metal</td> <td>@item.Price</td> <td>@item.Quantity</td> <

I upgraded an existing ASP.NET Core 2.2 project to 3.0. I have a method that returns JSON which worked in 2.2, but in 3.0, it causes "The collection type 'Newtonsoft.Json.Linq.JToken' is not supported." at the return. [HttpGet()] public async Task<JsonResult> Get() { var res = some class object in a third-party library; return new JsonResult(res); } I have searched Google and found that Microsoft has replaced Newtonsoft Json to System.Text.Json , but I have not explicitly used Newtonsoft Json. In the project's "Frameworks", I could see the Newtonsoft Json, and I removed it and the using

I have recently upgraded my web api from .Net core 2.2 to .Net core 3.0 and noticed that my requests are getting an error now when I pass an enum in a post to my endpoint. For example: I have the following model for my api endpoint: public class SendFeedbackRequest { public FeedbackType Type { get; set; } public string Message { get; set; } } Where the FeedbackType looks like so: public enum FeedbackType { Comment, Question } And this is the controller method: [HttpPost] public async Task<IActionResult> SendFeedbackAsync([FromBody]SendFeedbackRequest request) { var response = await

In ASP.NET Core 2.x I used standard routes registation Configure method of Startup class to register fallback route for SPA application using MapSpaFallbackRoute extension method from Microsoft.AspNetCore.SpaServices.Extensions Nuget package: public void Configure(IApplicationBuilder app) { // ... app.UseMvc(routes => { routes.MapRoute( name: "default", template: "{controller=Home}/{action=Index}/{id?}"); routes.MapSpaFallbackRoute( name: "spa-fallback", defaults: new { controller = "Home", action = "Index" }); }); } I cannot find similar extension method when using ASP.NET Core 3.0

I updated my project to .NETCORE v3.0.0-preview3 and I now get: Startup.cs(75,50,75,69): warning CS0618: 'IHostingEnvironment' is obsolete: 'This type is obsolete and will be removed in a future version. The recommended alternative is Microsoft.AspNetCore.Hosting.IWebHostEnvironment.' The code is: public void Configure(IApplicationBuilder app, IHostingEnvironment env) { if (env.IsDevelopment()) { ... What is the correct way to do this now ? is there any documentation/example to show that ? It seems IHostingEnvironment has been replaced by IHostEnvironment (and a few others). You should be able

I'm wondering if it's possible to reference child elements in the ChildContent parameter of a component. I can pass values from parent components to children explicitly or by using a cascading parameter, but there is no great way for a parent component to "know" about elements inside the ChildContent RenderFragment . A possible use-case for this would be a UIList component that gets the number of UIListItems that have been added to the UIList component during the render process. I've attempted to override the BuildRenderTree method on my component to manually manipulate ChildContent

The code is working in Core 3.0 preview7 version, but after updating to 3.0 Azure functions started giving an error. The error comes if I try to access builder service object. Also not able to debug the issue. Also tried updating Microsoft.Extensions.DependencyInjection 3.0 but still the same error. public class Startup : FunctionsStartup { public override void Configure(IFunctionsHostBuilder builder) { var descriptor = builder.Services.FirstOrDefault(d => d.ServiceType == typeof(IConfiguration)); // error after adding this var currentDirectory = $"{Environment.GetEnvironmentVariable("HOME")}\

Context In my NET Framework 4.x ASP MVC projects, when using the IDE, it was possible to edit a .cshtml View, then save, then press ctrl+F5 in the browser and see the actual change. It seems to be not working in .NET Core (using VS 2019 and .NET Core 3 Preview 5) Question Is this feature missing in .NET Core or is this a preview issue, or am I missing something? This is something that is no longer enabled by default as of ASP.NET Core 3, but it can be re-enabled as documented here : Runtime compilation is enabled using the Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation package. To enable