Post parameter from Angular to .Net 5 webapi are not sent-CodePudding

I have a .Net5 Webapi with a simple controller and a HttpPost-Action:

[ApiController]
[Route("[controller]")]
public class UploadController : ControllerBase
{
    [HttpPost]
    [Route("codeisvalid")]
    public bool CodeIsValid(string code)
    {
       return code == "dbddhkp";
    }
}

I try to call that Action from within an Angular Component:

this._http.post<any>(http://localhost:29438/upload/codeisvalid', { code: 'wrongcode'}).subscribe(data => {
   this.codeIsValid=data;
   this.codeChecked=true;
});

The action is called, but "code" is always null. I also tried to modify the Action to public bool CodeIsValid([FromBody] string code) (adding "[FromBody]") but then the method is not called anymore, but receive an error 400 instead

"The JSON value could not be converted to System.String"

What Do I have to change to make this work?

CodePudding user response：

Assuming all else works, instead of passing an object, just pass in 'wrongcode'. C# is expecting only a string to be passed in, not a property of an object.

this._http.post<any>('http://localhost:29438/upload/codeisvalid', 'wrongcode').subscribe(data => {
   this.codeIsValid=data;
   this.codeChecked=true;
});

CodePudding user response：

try to select another content type

let options = {
    headers: new HttpHeaders().set('Content-Type', 'application/x-www-form-urlencoded')
};

this._http.post<any>(http://localhost:29438/upload/codeisvalid', { code: 'wrongcode'}, options). .....