动态文件上传不起作用

Question

我正在尝试使用JQuery和C＃MVC上传任何数量的文件。 当我创建表单数据并将其发布时，Request.Files对象为null。

返回的消息是“请确保您已上传所有必要的文档。”

如何将动态创建的输入文件传递到C＃端？

这是HTML

<div style="text-align:center; display:block; width:100%; margin-bottom:20px" id="regPDFUpload"></div>

然后，我使用以下代码附加文件上传元素：

//create file uploaders
                        var i = response.pdfPageCount;
                        for (j = 0; j < i; j++) {
                            var _file = '<label style="float:left; width:100px; padding-top:15px;" for="filePDFUpload' + j + '">Page ' + (j + 1) + '</label><input type="file" style="width:70%; display: block; float:left; margin-bottom:7px;" id="filePDFUpload' + j + '" name="filePDFUpload' + j + '" />';
                            _file += '<div style="clear:left"></div>';
                            $('#regPDFUpload').append(_file);
                        }

这是将文件添加到formData的JQuery

var i = $('#regdoc-page-count').val();

        var formData = new FormData();

        //add files to form data
        for (j = 0; j < i; j++) {

            formData.append('filePDFUpload' + j, 'filePDFUpload' + j);
        }

        formData.append("customerGUID", $('#Customer-Guid').val());
        formData.append("tempAccountNumber", $('#Temp-Account-Number').val());

        $.ajax({
            cache: false,
            url: 'uploadRegDoc',
            data: formData,
            type: 'POST',
            contentType: false,
            processData: false,
            success: regUpoadSignedRegistrationSucess,
            complete: resetWait,
            error: regFailure
        });

这是C＃代码

 [ValidateInput(false)]
        [HttpPost]
        public ActionResult UploadRegDoc(FormCollection form)
        {
            if (Request.Files.Count > 0)
            {
                //create customers folder in content/customer-doc
                string filepath = "";

                filepath = Server.MapPath("~/content/customer-docs/" + form["customerGUID"] + "/signed/");
                if (!System.IO.Directory.Exists(filepath))
                {
                    System.IO.Directory.CreateDirectory(filepath);
                }

                try
                {
                    //  Get all files from Request object  
                    HttpFileCollectionBase files = Request.Files;
                    for (int i = 0; i < files.Count; i++)
                    {
                        HttpPostedFileBase file = files[i];
                        string fname;

                        // Checking for Internet Explorer  
                        if (Request.Browser.Browser.ToUpper() == "IE" || Request.Browser.Browser.ToUpper() == "INTERNETEXPLORER")
                        {
                            string[] testfiles = file.FileName.Split(new char[] { '\\' });
                            fname = testfiles[testfiles.Length - 1];
                        }
                        else
                        {
                            fname = file.FileName;
                        }

                        fname = Path.Combine(filepath, fname);
                        file.SaveAs(fname);
                    }

                    //redirect to 
                    return Json(new
                    {
                        success = true,
                        message = "redirect",
                        resultId = (int)UserRegistrationType.AdminApproval,
                    });

                }
                catch (Exception ex)
                {
                    //registration complete.
                    return Json(new
                    {
                        success = false,
                        message = "An error occured uploading your files. " + ex.Message,
                    });
                }
            }
            else
            {
                //registration complete.
                return Json(new
                {
                    success = true,
                    message = "Please make sure you have uploaded all necessary documents.",
                });
            }
        }

Answer 1

非常感谢adeneo对上述答案发表评论。 将创建一个正式答案以使其成为答案。

正是JQuery代码将文件附加到formData对象。 它需要附加文件上传元素中的文件。

更新的JQuery代码：

   for (j = 0; j < i; j++) {

            formData.append('filePDFUpload' + j, $('#filePDFUpload' + j).get(0).files[0]);
        }