ASP.NET Core API - How to accept JSON array in POST

Question

I'm following along with a tutorial for an ASP.NET Core API. I have the following in my controller, which successfully accepts a single Mission item. I'd like to adapt it to be able to accept a JSON array with multiple missions, as well as just a single one.

I know it will involve a List, but I'm new to C#, so I'm not sure what that would look like.

[HttpPost]
public async Task<ActionResult<Mission>> PostMission(Mission mission)
{
    if (_context.Missions == null)
    {
        return Problem("Entity set 'MissionContext.Missions' is null.");
    }
    _context.Missions.Add(mission);
    await _context.SaveChangesAsync();

    return CreatedAtAction(nameof(GetMission), new { id = mission.ID }, mission);
}

Answer 1

Hi @baylf2000,

If you want to receive multiple missions, you can just add List<T> in your parameter,

public async Task<ActionResult<Mission>> PostMission(List<Mission> mission)
{
}

Demo:

Here I send json array in request body:

Then I can receive json array in my action:

If you receive data from form, you don't need to add [FromBody] attribute before your parameter like what I post in gif.

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