[SOLVED] How To Check The Task Result In the Controller In ASP.NET Core Web API

Issue

I have this in my repository:

public async Task<IEnumerable<CatalogModel>> GetCatalogByName(string _UserId, string _CatalogName)
{
    var data =  await dbcontext.Catalog.Where(x => x.UserId == _UserId).ToListAsync();
    return mapper.Map<IEnumerable<CatalogModel>>(data);
}

And currently, this in my Controller:

[HttpGet]
public IActionResult GetCatalogsByName([FromQuery] string UserId, string CatalogName)
{
     var task = repository.Catalog.GetCatalogByName(UserId, CatalogName);
     return Ok(task);
 }

So right now I am returning Ok(task) all the time. I would like to check if there is data returned from the repository or not so I can also return NotFound(task). I could not seem to figure out how to do that.

Solution

You will need to wait for the GetCatalogByName to complete before examining the result.

A simple await will do

[HttpGet]
public IActionResult GetCatalogsByName([FromQuery] string UserId, string CatalogName)
{
     var task = await repository.Catalog.GetCatalogByName(UserId, CatalogName);
     // check task data before return
     return Ok(task);
}

But I strongly recommend you to read more about async/await programming here

Answered By – Tuan Tran

Answer Checked By – David Goodson (BugsFixing Volunteer)