asp.net-mvc - MVC 文件上传的 Bootstrap 进度条

Question

有没有一种简单的方法可以在文件加载时显示阻塞的 Bootstrap 进度条？

上传文件时，进度会显示在 chrome 的状态栏中:



我希望对话框看起来像 this



我的 Action 看起来像这样:

 [HttpPost]
        public ActionResult Upload(UploadViewModel model)
        {
                using (MemoryStream uploadedFile = new MemoryStream())
                {
                    model.File.InputStream.CopyTo(uploadedFile);                            
                    uploadService.UploadFile(uploadedFile, model.File.ContentType)
                    return View();
                 }
         }

模型:

  public class UploadViewModel
    {
        [Required]
        public HttpPostedFileBase File { get; set; }
    }

看法:

@model Bleh.Web.Models.UploadViewModel

@using (Html.BeginForm("Upload", "Home",
  FormMethod.Post, new { enctype = "multipart/form-data", @role = "form" }))
{
   <div class="form-group">
    @Html.LabelFor(m => m.File)
    @Html.TextBoxFor(m => m.File, new { type = "file", @class = "form-control" })
    <strong>@Html.ValidationMessageFor(m => m.File, null, new { @class = "label label-danger" })</strong>
</div>

<div class="form-group noleftpadding">
    <input type="submit" value="Upload File" class="btn btn-primary" />
</div>
}

有没有一种简单的方法来处理浏览器显示的百分比并将其应用于进度条？

Answer 1

ajax 进度处理程序可以完成这项工作吗？

function uploadFile(){
    myApp.showPleaseWait(); //show dialog
    var file=document.getElementById('file_name').files[0];
    var formData = new FormData();
    formData.append("file_name", file);
    ajax = new XMLHttpRequest();
    ajax.upload.addEventListener("progress", progressHandler, false);
    ajax.addEventListener("load", completeHandler, false);
    ajax.open("POST", "/to/action");
    ajax.send(formData);
}

function progressHandler(event){
    var percent = (event.loaded / event.total) * 100;
    $('.bar').width(percent); //from bootstrap bar class
}

function completeHandler(){
    myApp.hidePleaseWait(); //hide dialog
    $('.bar').width(100);
}

注:myApp.showPleaseWait();和 myApp.hidePleaseWait();在 link 中定义由 OP 提供。

(编辑:formData 和 formdata 以前不一致)