ASP.NET Core WebApi

问题:

I'm trying to make a web api using the new .NET Core. But having some trouble using the the [HttpPost]. When I use postman, it doesn't return anything. Also when I put a breakpoint on the return line it's never hit.

This is my method in the controller:

    // POST api/values
    [HttpPost]
    public IEnumerable<string> Post([FromBody]string value)
    {
        return new string[] { "value1", "value2" };
    }

The GET method is working:

    // GET api/values
    [HttpGet]
    public IEnumerable<string> Get()
    {
        return new string[] { "value1", "value2" };
    } 

It returns a Json value and when I place a breakpoint it hits.

I think I have to add something somewhere else to map the post to this method, but I can't figure out what.

Update: The post request

This is the Post code generated in Postman:

POST /api/values HTTP/1.1
Host: localhost:60228
Content-Length: 0
Cache-Control: no-cache
Postman-Token: 295f7c89-f5a8-d6cd-d679-ae907b010550

firstName:jantje

回答1:

Try to post JSON data to your controller action and use a model class to bind the values. I assume the simple string cannot be parsed by the JSON or XML formatters that are used by ASP.NET Core by default.

So this will probably work:

[HttpPost]
public IActionResult Post([FromBody]DataModel model)
{
    return Ok();
}

public class DataModel {
     public string FirstName {get; set;}
}

with this JSON data

{
    firstName: "jantje"
}

回答2:

I've found myself in the same situation and the reason was that i send text/plain request instead of application/json request.

After this change I was able to send a simple string to the HttpPost action. Before the change no breakpoint was hit too.

I've tried it with ValuesController from the WebAPI example and it runs too.