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 to date. This works all great and well until I refresh the page, then I get the Cannot access a disposed object
error and I can't figure out how to get around it.
I have the follow services:
services.AddDbContextPool<MainDbContext>(...);
services.AddSingleton<RefreshService>();
RefreshService.cs:
public class RefreshService {
public Func<long, Task> OnRefreshThing { get; set; }
public void RefreshThing(long thingId) => OnRefreshThing?.Invoke(thingId);
}
Index.blazor:
protected override void OnInitialized() {
RefreshService.OnRefreshIssue += OnRefreshIssue;
}
private async Task OnRefreshThing(long thingId) {
// This works perfectly until I refresh the page & try to call it again
Thing thing = await MainDbContext.Things.FindAsync(thingId); // exception is thrown here
await MainDbContext.Entry(thing).ReloadAsync();
}
And here's an example of what triggers the error:
Thing thing = Things.Where(t => t.ThingId == 1);
thing.Name = "New name";
RefreshService.RefreshThing(thing.ThingId);