How to use

Manage indexedDb from c# with Blazor. Simple way to interact with IndexedDB similar how you can do with EntityFramework.

How to use

BlazorIndexedDb requires an instance IJSRuntime, should normally already be registered.

Create any code first database model you'd like to create and inherit from IndexedDb. You must be use the attribute FieldAttribute to setup the properties.

Your model (eg. PlayList) should contain an Id property or a property marked with the key attribute.

    public class PlayList
    {
        [FieldAttribute(IsKeyPath = true, IsAutoIncemental = false, IsUnique = true)]
        public string Id { get; set; }
        public string Url { get; set; }
        public string Title { get; set; }
        public string Ownner { get; set; }
    }

namespace

BlazorIndexedDb
BlazorIndexedDb.Attributes
BlazorIndexedDb.Commands
BlazorIndexedDb.Models
BlazorIndexedDb.Store

Then can create a DBContext class to manage the database like in EF using a constructor with IJSRuntime and properties with the server about how to manage your tables.

public class DBContext : StoreContext
    {
        #region properties
        public StoreSet PlaysList { get; set; }
        #endregion

        #region constructor
        public DBContext(IJSRuntime js) : base(js, new Settings { DBName = "MyDBName", Version = 1}) {}
        #endregion
    }

In Program.cs add the service for the DBContext

public class Program
    {
        public static async Task Main(string[] args)
        {
            var builder = WebAssemblyHostBuilder.CreateDefault(args);
            builder.RootComponents.Add< App >("#app");
            builder.Services.AddScoped(sp => new HttpClient { BaseAddress = new Uri(builder.HostEnvironment.BaseAddress) });
            //INJECT THE DBContext
            builder.Services.AddSingleton< DBContext >(); //or AddScope

            await builder.Build().RunAsync();
        }
    }

In the Index.html or the file are you using to start the app no need javascript references.

In the component need to use a IndexDb inject DBContext

        [Inject]
        public DBContext _DBContext { get; set; }

You can modify the model classes any time, but if the model you will pass don't match with the model created when create the IndexDb this will return a exception.

Working with records

In all the select action you will receive the List except if you are looking for one Key Id send, then you will receive the Model object.
In all actions you will receive a ResponseJsDb model or a List with all the responses, if you are sending a lot of rows.

    public class ResponseJsDb
    {
        public bool Result { get; set; }
        public string Message { get; set; }
    }

Working with records from StoreSet

The store set always return the model or list of the model for all select actions and CommandResponse record for the comands actions

 public record CommandResponse(bool Result, string Message, List Response);

Dependencies

• Microsoft.AspNetCore.Components.Web (>= 6.0.3)