public class Product
{
    [HiddenInput(DisplayValue = false)]
    public int ProductID { get; set; }
 
    [required(ErrorMessage="Please enter a product name")]
    public string Name { get; set; }
 
    [required(ErrorMessage="Please enter a description")]
    [DataType(DataType.MultilineText)]
    public string Description { get; set; }
 
    [required]
    [Range(0.01,double.MaxValue,ErrorMessage="Please enter a positive price")]
    public decimal Price { get; set; }
 
    [required(ErrorMessage="Please specify a category")]
    public string Category { get; set; }
 
    public byte[] ImageData { get; set; }
 
    [HiddenInput(DisplayValue = false)]
    public string ImageMimeType { get; set; }
}

我引用了System.Web.Mvc和System.ComponentModel.DataAnnotations.

我在这里提出如下：

<h1>Edit @Model.Name</h1>
 
@using (Html.BeginForm("Edit","Admin",FormMethod.Post,new { enctype = "multipart/form-data" })) {
@Html.EditorForModel()
 
<div class="editor-lable">Image</div>
<div class="editor-=field">
    @if (Model.ImageData == null)
    {
        @:None
        }
    else
    {
        <img width="150" height="150" src="@Url.Action("GetImage","Product",new { Model.ProductID })" />
    }
    <div>Upload new image: <input type="file" name="Image" . /></div>
</div>
<input type="submit" value="Save" />
@Html.ActionLink("Cancel and return to List","Index")

}

问题是当[必需]注释正常工作时,[HiddenInput]字段实际上并不隐藏. html源代码甚至没有显示隐藏属性.

为什么Html.EditorForModel没有将[HiddenInput]属性应用于这些属性？有任何想法吗？