Web API complex parameter properties are all null

Question

I have a Web API service call that updates a user\'s preferences. Unfortunately when I call this POST method from a jQuery ajax call, the request parameter object\'s proper

Answer 1

  public class CompanyRequestFilterData
    {
             public string companyName { get; set; }
             public string addressPostTown { get; set; }
             public string businessType { get; set; }
             public string addressPostCode{ get; set; }
             public bool companyNameEndWith{ get; set; }
             public bool companyNameStartWith{ get; set; }
             public string companyNumber{ get; set; }
             public string companyStatus{ get; set; }
             public string companyType{ get; set; }
             public string countryOfOrigin{ get; set; }
             public DateTime? endDate{ get; set; }
             public DateTime? startDate { get; set; }
}

webapi controller

    [HttpGet("[action]"),HttpPost("[action]")]
    public async Task> GetCompanyRequestedData(CompanyRequestFilterData filter)
    {}

jsvascript/typescript

export async function GetCompanyRequesteddata(config, payload, callback, errorcallback) {
await axios({
    method: 'post',
    url: hostV1 + 'companydata/GetCompanyRequestedData',
    data: JSON.stringify(payload),
    headers: {
        'secret-key': 'mysecretkey',
        'Content-Type': 'application/json'
    }
})
    .then(res => {
        if (callback !== null) {
            callback(res)
        }
    }).catch(err => {
        if (errorcallback !== null) {
            errorcallback(err);
        }
    })

}

this is the working one c# core 3.1

my case it was bool datatype while i have changed string to bool [companyNameEndWith] and [companyNameStartWith] it did work. so please check the datatypes.