Asp.Net Core Post FromBody Always Null

问题:

I've got a new API that I'm building with ASP.NET Core, and I can't get any data POST'ed to an endpoint.

Here's what the endpoint looks like:

[HttpPost] [Route("StudentResults")] public async Task<IActionResult> GetStudentResults([FromBody]List<string> userSocs, [FromBody]int collegeId) {     var college = await _collegeService.GetCollegeByID(collegeId);     // var occupations = await _laborMarketService.GetOccupationProgramsBySocsAndCollege(userSocs, college);     return Ok(); } 

And here's what my payload that I'm sending through Postman looks like:

{     "userSocs": [             "291123",             "291171",             "312021",             "291071",             "152031",             "533011"         ],     "collegeId": 1 } 

I'm making sure that I have postman set as a POST, with Content-Type application/json. What am I doing wrong?

回答1:

You get always null because you need to encapsulate all your post variables inside only one object. Like this:

public class MyPostModel {     public List<string> userSocs {get; set;}     public int collegeId {get; set;} } 

and then

public async Task<IActionResult> GetStudentResults([FromBody] MyPostModel postModel) 

回答2:

I know it is not related to your case, still, I am posting my answer here. It is a silly mistake that I had done in my code. I just copied, one of my Get requests and changed it to Post request, and forgot to decorate the parameter with [FromBody]. If anyone else is having the same problem, please make sure that you are decorating the parameter with [FromBody].

[HttpPost] public IApiResponse Update([FromBody] User user) {  if (user == null) return new ApiBadRequestResponse(ModelState);  return _userService.Post(user) ? new ApiOkResponse(user) : new ApiResponse(500); } 

文章来源: Asp.Net Core Post FromBody Always Null