I am posting a data with xhr in the project I am coding. A json reaches the Controller but if I use [FromBody] I get error code 415. If I don't use it, the incoming json looks empty.

Controller

 [HttpPost]
        [IgnoreAntiforgeryToken]
        [Route("revizedCategoryzfc")]
        
        public void revizedCategoryzfc([FromBody]Category model)
        {
            if (model.fileCode != null)
            {
                      System.Console.WriteLine(model.fileCode);
            }
      
            System.Console.WriteLine("Girdi");
          
        }

POST XHR CODE

async function makeRequest(method, url,model) {
    return new Promise(function (resolve, reject) {
        let xhr = new XMLHttpRequest();
       
        xhr.open(method, url);
        xhr.onload = function () {
            if (this.status >= 200 && this.status < 300) {
                resolve(xhr.response);
            } else {
                reject({
                    status: this.status,
                    statusText: xhr.statusText
                });
            }
        };
        xhr.onerror = function () {
            reject({
                status: this.status,
                statusText: xhr.statusText
            });
        };
        xhr.send(model);
    });
}


document.querySelector('.save-service').addEventListener('click',async ()=>{

for (var es of document.querySelectorAll('.category-item')) {
    
    await makeRequest('POST','/zfc/revizedCategoryzfc',JSON.stringify({
        "Name":es.querySelector('.service-name').value,
        "fileCode":es.querySelector('.filecodas').value,
        "CategoryId":es.querySelector('.zfc-id').value
    }))
}

})

Error

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CodePudding user response：

Since you user json strngify and frombody, you have to add this header to your xhr

xhr.setRequestHeader("Content-Type", "application/json;charset=UTF-8");