javascript - 不允许加载本地资源错误

Question

我想在上传后显示上传的图片，但我不能。我从 JS 控制台收到一条错误消息:Not allowed to load local resource Error

这是我的代码:

Controller 方法:

获取文件并保存到本地

[HttpPost]
// public static readonly string TEMPORARY_FILES_UPLOADS_PATH = "~/Uploads/Tmp";     
public ActionResult UploadFileToTemporaryFolder(HttpPostedFileBase file)
            {
                string fileName = String.Empty;
                string path = String.Empty;
                if (file != null)
                {
                    try
                    {
                       string timestamp = DateTime.UtcNow.ToString("yyyy_MM_dd_HH_mm_ss_fff",CultureInfo.InvariantCulture);
                       fileName = timestamp + "_" + Path.GetFileName(file.FileName);
                       path = string.Format("{0}/{1}", Server.MapPath(ApplicationConfig.TEMPORARY_FILES_UPLOADS_PATH), fileName);
                        System.IO.Directory.CreateDirectory(Server.MapPath(ApplicationConfig.TEMPORARY_FILES_UPLOADS_PATH));
                        file.SaveAs(path);
                    }
                    catch (Exception)
                    {}
                }
                return Json(new { FileName = fileName, FilePath=path }, JsonRequestBehavior.AllowGet);
            }

HTML :

<input id="HotelJustificatifFile" type="file" value="joindre pièce" name="upload"  >
<div id="JustificatifsHotelSection" style="display:block;"></div>

Js

上传文件并将结果附加到一个div

 $('body').on('change', '#HotelJustificatifFile', function () {

               var file = document.getElementById('HotelJustificatifFile').files[0];
               if (file != null) {
                   var myData = new FormData();
                   myData.append("file", file);

                   // Uploading File via Ajax To Temporar Folder
                   $.ajax({
                       type: "POST",
                       url: "<%: Url.Action("UploadFileToTemporaryFolder","Enqueteur") %>",
                       processData: false,
                       contentType: false,
                       data: myData,
                       cache: false,
                       dataType: "json",
                       success: function (result) {
                           if (result.FileName != '') {

                               var fileName = result.FileName;
                               var filePath = result.FilePath;

                               //alert(filePath );
                               var imageDiv = "<div>";
                               imageDiv+='<div style="z-index: 10; position: absolute; top: 4px; left: 10px;">';
                               imageDiv += '<a onclick="afficherImage(' + fileName + ')" >Supprimer</a>';
                               imageDiv +='</div>';
                               imageDiv += '<img u=image src="' +filePath + '" />';
                               imageDiv += '</div>';
                               // Adding Image To the Div 
                               $('#JustificatifsHotelSection').append(imageDiv);

                           }
                           },
                       failure: function () {
                       }
                   });

                   // Else
                }
           });

Answer 1

不能返回物理文件路径

尝试返回图片 url (http://...../imageName)

或者您可以使用 html5 API 在浏览器中显示图像，而无需将图像上传到服务器:

var file = document.getElementById(HotelJustificatifFile).files[0];
var reader = new FileReader();
var img = new Image();
img.src = reader.result;
youDivContainerForImage.appendChild(img);