.netCore transmission parameters change WebApi

.netCore WebApi the general previous MVc5, inherited from ApiController, is WebApi, using a unique pipe handling model, Core, and then, they are usually inherited from ControllerBase , denoted controller class [ApiController]

1. The front-end code

. 1   // NetCoreWebApi, the transmission application / json; format, the rear end without adding [FormBody] can get the value 
2  $ .ajax ({
 . 3    type: "POST" ,
 . 4      URL: "/ API / WebApi / WW" ,
 . 5      Data: the JSON.stringify ({A:. 1, B: 2, C:. 4, "YY": 99, "BB": "match"})   // if not serialized, not obtain a rear end, serialized, WebApi not need to add FormBody, to get value, contentType: "application / json; charset = utf-8" // default does not form together with the kind that is not json 
. 6       contentType: "file application / -WWW-form-X urlencoded ", // this type can not be specified 
. 7       Data: {A:. 1, B: 2, C:. 4," YY ": 99," BB ":" match " },
 8      })

2. The back-end code

 [HttpPost]
[Route("ww")]
 public string Po(KJ k, int yy, string bb)
 {
     //k null
     //yy 0
     //b  null
 }

 

3. Conclusion:

Because the front-end is specified, transmission type, "application / x-www-form-urlencoded", if not write contentType, its default value is "application / x-www-form-urlencoded", but failed to specify

Last Request format: application / problem + json; charset = utf-8

Being given: 415

Resolution: json designated as a transmission, after transmission of the sequence, the rear end can get value (can not [FormBody]), in the core of the transmission contentType

[HttpPost] 
[the Route ( " E3 " )]
 public  String fdasfs ([BindAttribute (the include: " A, B " )] [FromBody] KJ P, int R & lt = 0 ) 
{ 
 // *************************************** *********. use of Net Core Mvc WebApi post of **************************************************** /
  // 1. distal specified file application / json, json data transfer, with or without [FromBody] can get the value 
   / * 2. the front end of the specified application / x-www-form- urlencoded, or data transmission json json object fails 
     * obviously provided a transmission type, but it became application / problem + json; charset = utf-8, request fails 
     3. If the incoming entity addition, there are other parameters, that are not bound on the value did not get 
      is such that the front end: {user: {a: 1 , b: 9}, r: 99} is not enough, 
      {a:. 1, B:} feasible. 9
       Entity as a whole must 
       / JSON = {var * User: {A:. 1, B:. 9,}, R & lt: 99}; 
$ .ajax ({ 
   URL: "/ API / mm / E3", 
   type: "POST" , 
   // contentType: "file application / X-WWW-form-urlencoded", // write this, write and white writing, eventually covered by transmission type 
   contentType: "file application / JSON", 
   Data: the JSON.stringify (JSON) 
}); * / / * BindAttribute characteristics 4.NetCore in contentType: "application / json ineffective, can not bind the attributes specified in 
  contentType:" application / x-www -form-urlencoded form can, filters out unwanted properties of 
   the FormData     
    a:. 1 
    B:. 9 * / return " the OK " ; 
}