Question

无论我尝试什么，我的帖子图片总是为null或对象引用未设置为对象的实例。

我有一个映射到表格的帖子类和图像类（首先使用EF代码）

这是我的代码：

查看：

<h2>Create</h2>
@using (Html.BeginForm("Create", "Admin", FormMethod.Post, new{ enctype =         "multipart/form-data" }))
{

@Html.ValidationSummary(true)

@Html.LabelFor(post => post.Post.Blog)
@Html.DropDownListFor(post => post.Post.BlogId, Model.BlogList)
@Html.LabelFor(post => post.Post.Category)
@Html.DropDownListFor(post => post.Post.CategoryId, Model.CategoryList)

@Html.LabelFor(post => post.Post.Title)
@Html.EditorFor(post => post.Post.Title)
<br />


@Html.LabelFor(post => post.Post.Content)
@Html.EditorFor(post => post.Post.Content)
    <br />
<input type="file" name="uploadImage" value="Upload" />
<input type="submit" value="Create" />
}

行动方法：

  [HttpPost]
    public ActionResult Create(Post post, HttpPostedFileBase image)
    {

        if (ModelState.IsValid)
        {
            var postBlog = _repository.Blogs.Single(b => b.BlogId == post.BlogId);
            post.Created = DateTime.Now;
            postBlog.Posts.Add(post);



                PostImage newImage = new PostImage()
                                         {
                                             MimeType = image.ContentType,
                                             ImageData = new byte[image.ContentLength],
                                             PostId = post.PostId
                                         };
                _repository.AddImage(newImage);



            _repository.Save();
            return RedirectToAction("Index");

        }

Answer 1

卫生署！问题是我在input元素中设置了'value'你只需输入type =“file”name =“Image”/＆gt;让它正确绑定

MVC 4 HttpPostedFileBase始终为null

1 个答案: