I am working on an Elsa .NET 8 proof of concept (POC). I’m attempting to connect Elsacontext in my controller, but I’m encountering the following issue.

Unable to resolve service for type ‘Elsa.Persistence.EntityFramework.Core.ElsaContext’ while attempting to activate ‘ElsaDemo2.Controllers.BinApprovalController

My program.cs code:-

using Elsa.Persistence.EntityFramework.Core.Extensions;
using Elsa.Persistence.EntityFramework.Sqlite;

using ElsaDemo2.WorkFlows;
using Elsa.Persistence.EntityFrameworkCore.DbContexts;

var builder = WebApplication.CreateBuilder(args);

builder.Services.AddDbContext<ElsaContext>(options =>
{
    options.UseSqlite("Data Source=elsa.db;");
});

builder.Services.AddElsaCore(options =>
    options
        .UseEntityFrameworkPersistence(ef => ef.UseSqlite("Data Source=elsa.db;"), true)
        .AddHttpActivities()
        .AddWorkflow<HelloWorld>())
    .AddElsaApiEndpoints();

builder.Services.AddControllersWithViews();

var app = builder.Build();

if (!app.Environment.IsDevelopment())
{
    app.UseExceptionHandler("/Home/Error");
    app.UseHsts();
}

//ELSA
app.UseHttpActivities();

app.UseHttpsRedirection();
app.UseStaticFiles();

app.UseRouting();

app.UseAuthorization();

app.MapControllerRoute(
    name: "default",
    pattern: "{controller=Home}/{action=Index}/{id?}");


app.Run();

My controller code:-

using Elsa.Persistence.EntityFramework.Core;
using Elsa.Services;

using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;

namespace ElsaDemo2.Controllers
{
    [ApiController]
    [Route("api/[controller]")]
    public class BinApprovalController : ControllerBase
    {
        private readonly IWorkflowRegistry _workflowRegistry;
        private readonly IWorkflowLaunchpad _workflowLaunchpad;
        private readonly ElsaContext _elsaContext;

        public BinApprovalController(IWorkflowRegistry workflowRegistry, IWorkflowLaunchpad workflowLaunchpad, ElsaContext elsaContext)
        {
            _workflowRegistry = workflowRegistry;
            _workflowLaunchpad = workflowLaunchpad;
            _elsaContext = elsaContext;
        }

        [HttpPost("v1/bins")]
        public async Task<IActionResult> Post([FromBody] BinRequestModel request, CancellationToken cancellationToken)
        {
            var allVersions = await _elsaContext.WorkflowDefinitions.ToListAsync(cancellationToken);
            var latestVersion = allVersions.OrderByDescending(x => x.Version).FirstOrDefault();

            return Ok("<h1>Request for Approval Sent</h1><p>Your bin has been received and will be reviewed shortly.</p>");
        }

        public class BinRequestModel
        {
            public string BinId { get; set; }
            // Add additional properties as needed
        }
    }
}

What I’m trying to do is test the Elsa database data using a POST request through a Postman collection.

Here is the URL and body I used for the Postman request:

https://localhost:xxxxx/api/BinApproval/v1/bins/

{
“BinId”: “bin123”
}

Can I get your support on this? Since I DI the context I am not sure what still wrong.