MVC Ajax POST不绑定子对象

$.ajax({
    url: '/your-endpoint',
    type: 'POST',
    contentType: 'application/json',
    data: JSON.stringify({
        mainObject: {
            property1: 'value1',
            subObject: {
                subProperty1: 'subValue1'
            }
        }
    }),
    success: function(response) {
        console.log('Success:', response);
    },
    error: function(xhr, status, error) {
        console.error('Error:', error);
    }
});

public class MainObject
{
    public string Property1 { get; set; }
    public SubObject SubObject { get; set; }
}

public class SubObject
{
    public string SubProperty1 { get; set; }
}

[HttpPost]
public IActionResult YourEndpoint([FromBody] MainObject mainObject)
{
    if (ModelState.IsValid)
    {
        // 处理数据
        return Ok(new { message = "Success" });
    }
    else
    {
        return BadRequest(ModelState);
    }
}