我有这个控制器,我要做的是将图像作为[字节]发送给控制器,这是我的控制器:
[HttpPost]
public ActionResult AddEquipment(Product product, HttpPostedFileBase image)
{
if (image != null)
{
product.ImageMimeType = image.ContentType;
product.ImageData = new byte[image.ContentLength];
image.InputStream.Read(product.ImageData, 0, image.ContentLength);
}
_db.Products.Add(product);
_db.SaveChanges();
return View();
}
在我看来:
@using (Html.BeginForm("AddEquipment", "Equipment", FormMethod.Post)) {
<fieldset>
<legend>Product</legend>
<div class="editor-label">
@Html.LabelFor(model => model.Name)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.Name)
@Html.ValidationMessageFor(model => model.Name)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.Description)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.Description)
@Html.ValidationMessageFor(model => model.Description)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.Price)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.Price)
@Html.ValidationMessageFor(model => model.Price)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.Category)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.Category)
@Html.ValidationMessageFor(model => model.Category)
</div>
<div>
<div>IMAGE</div>
<input type="file" name="image" />
</div>
<p>
<input type="submit" value="Create" />
</p>
</fieldset>
}
但问题是,在我的控制器上,image的值总是空的,我似乎无法获得关于httppostedfilebase的任何信息。
最佳答案
您需要使用多部分/表单数据添加encType
。
@using (Html.BeginForm("AddEquipment", "Equipment", FormMethod.Post, new {enctype = "multipart/form-data" })) {
你也可以把它添加到你的模型中,只要它是ViewModel:
public class Product
{
public Product()
{
Files = new List<HttpPostedFileBase>();
}
public List<HttpPostedFileBase> Files { get; set; }
// Rest of model details
}
您可以通过移除不需要的参数来检索文件。
[HttpPost]
public ActionResult AddEquipment(Product product)
{
var file = model.Files[0];
...
}
关于c# - MVC HttpPostedFileBase始终为null,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/21998637/