Question

我有同样的问题

@using (Html.BeginForm("CreateRequest", "SupportRequest", FormMethod.Post, new { id = "frmStemplate", enctype = "multipart/form-data" }))
{
  <td><input type="file" name="FirstFile" id="FirstFile" class="button"  /> 
  <input  type="button" class="button" id="FirstFileupload"  value="upload" onclick="Javascript:DocumentUpload();"/>
}

<script language="javascript" type="text/javascript">
    function DocumentUpload()
    {
        var BrowseFile = $('#FirstFile').val();

        if (BrowseFile != null && BrowseFile != "") {
            alert(BrowseFile);
            $.ajax({
                type: 'POST',
                dataType: 'json',
                url: '@Url.Content("~/SupportRequest/UploadFiles")?fileElementId=' + BrowseFile,
                success: function (data) {
                    alert('Hi'); //debugger;
                    if (data.Result == "SUCCESS") {
                        alert('Hi');
                    }
                    else {
                        ShowInfo('Document Uploaded Successfully');
                    }
                }
            });
        }
    }
</script>

在控制器方面，我有：

[AcceptVerbs(HttpVerbs.Post)]
public ActionResult UploadFiles(string fileElementId, FormCollection formColl)
{
    var FirstFile = Request.Files;
    foreach (string upload in Request.Files)
    {
        if (!Request.Files[upload].HasFile()) continue;
        string path = AppDomain.CurrentDomain.BaseDirectory + "uploads/";
        string filename = Path.GetFileName(Request.Files[upload].FileName);
        Request.Files[upload].SaveAs(Path.Combine(path, filename));
    }
    return Json(new { Filename = "" });
}

但我的Request.Files始终是null。

我尝试了几件事，比如将代码更改为Request.Files["FirstFile"]等。每次，文件集都是空的。

Answer 1

您需要在控制器操作参数中使用HttpPostedFileBase才能获取已发布的filedata。

请阅读Phil Haack的全部article

Answer 2

由于您要创建数据的帖子，因此您需要发布文件数据。看到这篇文章：

How can I upload files asynchronously?

Answer 3

我使用可以轻松上传文件的表单集合做了不同的方式。就像你在cshtml页面中的开始表单中添加该行一样。

public ActionResult Create([Bind(Include="Id,Name,Pic,ActiveStatus")] FormCollection form)
    {

        string Pic = "";
        var file = Request.Files[0];

        if (file.ContentLength > 0)
        {
            Pic = string.Format("~/Uploads/Category/{0}", file.FileName);
            file.SaveAs(HttpContext.Server.MapPath(Pic));

        }

        ItemCategory obj = new ItemCategory
        {
            Name = form["Name"].ToString(),
            Pic = file.FileName

        };

        db.ItemCategories.Add(obj);
        db.SaveChanges();
        return RedirectToAction("Index");

在MVC文件上传中，Request.files为空

3 个答案: