Blazor Tutorial - Knowledge Base (KB)
17 results in tag: entity-framework-core
Http GetJsonAsync returns null from server API
I am trying to create an application using Blazor and .NET Core 3 with EF Core 3. I have setup a database model and an API for users (/api/users) and browsing to this in chrome returns all of the entities in the database. My GetJson method in the Razor fi...
asked by Adam Creed
Blazor w/ Entity Framework Core - compile error
I have the following setup but am unable to finish building as I get an obscure error related to line 439 in file ...Blazor.MonoRuntime.targets... (MSB3073)....Does this essentially mean that Entity Framework Core will in no way work with Blazor preview 6...
asked by AlvinfromDiaspar
Add Model Project (EntityFramwork) to Asp.net Core 3 Project
I have 3 projects in my Solution like below:...ModelProject (EntityFramework)...ProjectA (ASP.NET MVC)...ProjectB (ASP.NET CORE 3 with Blazor)...So in model project i defined my tables ,relations, queries and their classes then added that on ProjectA and ...
asked by OMID
Blazor: A second operation started on this context before a previous operation completed
I'm creating a server side Blazor app. The following code is in the ...Startup.cs.......services.AddDbContext<MyContext>(o => o.UseSqlServer(Configuration.GetConnectionString("MyContext")), ServiceLifetime.Transient); services.AddTransient<MyViewModel, My...
asked by ca9163d9
How to execute stored procedure using blazor
I have been looking for some sample which show that the execution of stored procedure using blazor. ...So far i haven't seen anything related to execution of stored procedure using blazor....Here is the parameter with SP... MSKCIS.UpdateDischargeBoardData...
asked by Rashed Hossen
Responsive UI design causing problems for Entity Framework in Blazor application
I am familiar with writing highly responsive ASP.NET MVC applications where we load the initial page data, and then fire off multiple AJAX calls to load "secondary" data for the page. So behinds the scenes, these AJAX requests all hit the web server(s) a...
asked by DrGriff
How to display foreign key name in list table in Blazor Client Side
I am trying to display a subject name for a course where I saved the subject from a database driven dropdown list in a client-side Blazor app. The value returns as a Guid instead of the subject name. Has anyone accomplished this with Blazor? I couldn't fi...
asked by Lawrence
Injecting services in to the MainLayout.cs in Server-side Blazor
As the title suggests, I am trying to inject a service into the ...MainLayout... page in Blazor Server-side. The service is an ApplicationDbContext being injected like this:...@inject ApplicationDbContext context ...and being registered like this:...servi...
asked by LuvForAirplanes
Load child entity on the fetch of the Parent entity EFCore
I have the below model. What is the better way to load the parent entity with child entity at the time of fetching from the DB with find method?...Parent Entity:...public class Client { public int Id { get; set; } public string LastName { get; se...
asked by KARAN
Issue with Services when attempting to add Context to Startup.cs
I get this error when I attempt to migrate my project:...An error occurred while accessing the Microsoft.Extensions.Hosting services. Continuing without the application service provider. Error: Some services are not able to be constructed (Error while val...
asked by Peter Ji
Blazor concurrency problem using Entity Framework Core
My goal...I want to create a new IdentityUser and show all the users already created through the same Blazor page. This page has:...a form through you will create an IdentityUser...a third-party's grid component (DevExpress Blazor DxDataGrid) that shows a...
asked by Leonardo Lurci
How to access Entity Framework DbContext entities in Server-Side Blazor Components
I'm new to .NET Core and Blazor, with mostly WebForms and MVC experience....All the Blazor documentation and tutorials I've found use a separate API project and access data through HttpClient and Json serialization/deserialization. I see why this would be...
asked by Josh Bula
Blazor with Database First
I'm trying to build a simple CRUD app using Blazor in Visual Studio 2019 - I have watched over 7 tutorials between YouTube, PluralSight, and Channel 9, and in all of them, they use Entity Framework Core to create the Database and Tables from within Visual...
asked by Stpete111
EF Core's Include() function not working from direct GET request
I am building this app using.NET Core 3.1 and my json output isn't right. Here is the class I want a list of:...[DataContract(IsReference = true)] public class State { public int Id { get; set; } [DataMember] public string Name { get; set; } ...
asked by Bruno Blanes
Entity Framework Core autosaves objects in Blazor
I might be not getting how some stuff work in Blazor, but here's what my issue is:...whenever I want to edit an object for example ...People... object, I select it in ...@page "/people"... from a table, then I'm redirected to the ...@page "people/edit/id"...
asked by Barri
Blazor Server - DbContext is disposed after refreshing page
I am developing a Blazor server app, where all clients will have a list of ...things..., any one of these clients can update ...thing... which should then trigger a callback telling all clients to call ...DbContext.Entry(thing).Reload()... so they're up t...
asked by John
Need some help on a Linq query, 3rd level include where
I've scoured the internet but not been able to find something for my specific case....Here's my models:... public class Unit { [Key, DatabaseGenerated(DatabaseGeneratedOption.Identity)] public int UnitID { get; set; } public string Name { g...
asked by Tjopsta