前端輸出都有值，但後端接不到參數，有大大能解惑嗎？
(雖然用字串可以往後傳，但想知道為何 Array 不行

前端 Code

var studentList = [];
$("[name='studentObj']:checked").each(function (index, obj) {
    studentList.push(obj.value);
});
this.VoucherModel.StudentList = studentList;
console.dir(this.VoucherModel);                
modal.fleeting("Running...");

await axios({
    method: 'post',
    url: '/Student/DistributedVoucher',
    headers: {
        "Content-Type": "multipart/form-data",
    },
    data: {
        Count: this.VoucherModel.Count,
        StudentList: this.VoucherModel.StudentList,
    }
}).then(async function (res) { 
    if (res.isSucess == true) { modal.alert("Success"); }
}).catch(err => {
    modal.alert("Fail：" +  err.response.data);
});

前端輸出

後端 Code

[HttpPost]
[IgnoreAuthorize]
public async Task<IActionResult> DistributedVoucher(DistributedVoucherViewModel model)
{
    // do something ...			
    return Ok();
}

public class DistributedVoucherViewModel
{
    public List<String> StudentList { get; set; }
    public int Count { get; set; }
}

後端監測