将带有数据和文件的 JSON 发布到 Web Api jQuery MVC

我需要通过一个请求发布到带有JSON(最好)的Api控制器.

问题是传递数据和文件(上传图像).我的财产是空的(空的).

我看了相当多的博客，但似乎不能让图片的数据通过.

public class SomeModel
{
    public string Name { get; set; }
    public string Email { get; set; }
    public string City { get; set; }
    public HttpPostedFileBase Image { get; set; }
    public string Title { get; set; }
    public string Description { get; set; }
    public string CountryCode { get; set; }
}


    [HttpPost]
    public void CreateContestEntry(SomeModel model)
    {
        // model.Image is always null
        // .. get image here - the other properties no issues
    }

jQuery

    // create model for controller
    var model = {
        Name: $.trim($contestForm.find('[name="nombre"]').val()) + ' ' + $.trim($contestForm.find('[name="apellido"]').val()),
        Email: $.trim($contestForm.find('[name="email"]').val().toLowerCase()),
        City: $.trim($contestForm.find('[name="cuidad"]').val()),
        Title: $.trim($contestForm.find('[name="title"]').val()),
        Description: $.trim($contestForm.find('[name="description"]').val()),
        CountryCode: 'co',
        Image: $contestForm.find('[name="file-es"]')[0].files[0]  // this has the file for sure
    };

    $.ajax({
        url: '/Umbraco/api/ControllerName/CreateContestEntry',
        type: 'POST',
        dataType: 'json',
        data: JSON.stringify(model),
        //data: $('#test-form').serialize(),  // tried this and using FormData()
        processData: false,
        async: false,
        contentType: 'application/json; charset=utf-8',
        complete: function (data) {

        },
        error: function (response) {
            console.log(response.responseText);
        }
    });

Blogs I've looked at:

• File Upload with Additonal Form Data to Web Api from MVC
• http://www.asp.net/web-api/overview/advanced/sending-html-form-data,-part-1
• http://www.asp.net/web-api/overview/advanced/sending-html-form-data,-part-2
• Custom form data with multiple files to Web API controller

当我try FormData和$('#form1').serialize()方法时，我的provider.FileData和provider.FormData也总是空的.我从方法中删除了model个参数，当我切换它时，断点正在命中.

    [HttpPost]
    public void CreateContestEntry()
    {
        string root = HttpContext.Current.Server.MapPath("~/App_Data");
        var provider = new MultipartFormDataStreamProvider(root);

        try
        {
            // Read the form data.
            Request.Content.ReadAsMultipartAsync(provider);

            // This illustrates how to get the file names.
            foreach (MultipartFileData file in provider.FileData)
            {
                // empty
            }

            foreach (var key in provider.FormData.AllKeys)
            {
                foreach (var val in provider.FormData.GetValues(key))
                {
                    // empty
                }
            }
            //return Request.CreateResponse(HttpStatusCode.OK);
        }
        catch(Exception ex)
        {

        }
    }

SOLUTION:

Going off of @Musa's answer, here's the Api Controller code. I mapped the NameValueCollection to my model.

    [HttpPost]
    public void CreateContestEntry()
    {
        try
        {
            // get variables first
            NameValueCollection nvc = HttpContext.Current.Request.Form;
            var model = new WAR2015ContestModel();

            // iterate through and map to strongly typed model
            foreach (string kvp in nvc.AllKeys)
            {
                PropertyInfo pi = model.GetType().GetProperty(kvp, BindingFlags.Public | BindingFlags.Instance);
                if (pi != null)
                {
                    pi.SetValue(model, nvc[kvp], null);
                }
            }

            model.Image = HttpContext.Current.Request.Files["Image"];
        }
        catch(Exception ex)
        {

        }
    }