@ Html.EditorFor(图片)

时间:2012-03-13 10:14:46

标签: c# asp.net-mvc razor

我正在尝试允许用户将图片上传到我们的网站,我不太确定如何使用它。我尝试使用多种类型来定义图片,包括System.Drawing.ImageHttpPostedFileWrapper,但@Html.EditorFor总是(可以理解)将其属性显示为要编辑的字段。

在我看来,我确实有,而不是@Html.EditorFor我确实有<input type="file" name="imageToUpload" />但是它没有作为Model的一部分被视为我的观点?我对MVC很陌生,所以我希望它是微不足道的。

这是我的观点:

@using (Html.BeginForm()) {
    @Html.ValidationSummary(true)
    <fieldset>
        <legend>New Image</legend>

        <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.Image)
        </div>
        <div class="editor-field">
            <input type="file" name="imageToUpload" />
        </div>

        <p>
            <input type="submit" value="Create" />
        </p>
    </fieldset>
}

我的控制器:

    [HttpPost]
    public ActionResult CreateImage(string brand, string collection, ImageEditViewModel imageEditViewModel)
    {
        string fileName = Guid.NewGuid().ToString();
        string serverPath = Server.MapPath("~");
        string imagesPath = serverPath + String.Format("Content\\{0}\\Images\\", Helper.Helper.ResolveBrand());

        string newLocation = Helper.Helper.SaveImage(fileName, imagesPath, imageEditViewModel.Image.InputStream)

        Image image = new Image
        {
            Collection = ds.Single<Collection>(c => c.Season == collection
                && c.Brand.Name == brand),
            Description = imageEditViewModel.Description,
            Location = "newLocation",
            Order = Helper.Helper.GetImageOrder(brand, collection)
        };

        ds.InsertOnSubmit<Image>(image);
        ds.SubmitChanges();

        return RedirectToAction("Brand");
    }

最后是ViewModel:

public class ImageEditViewModel
{
    public int CollectionId { get; set; }

    public string Description { get; set; }

    public HttpPostedFileWrapper Image { get; set; }

    public int Order { get; set; }
}

1 个答案:

答案 0 :(得分:15)

确保在表单上指定正确的enctype="multipart/form-data",否则您将无法上传文件:

@using (Html.BeginForm(null, null, FormMethod.Post, new { enctype = "multipart/form-data" }))
{
    @Html.ValidationSummary(true)
    <fieldset>
        <legend>New Image</legend>

        <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.ImageToUpload)
        </div>
        <div class="editor-field">
            <input type="file" name="imageToUpload" />
        </div>

        <p>
            <input type="submit" value="Create" />
        </p>
    </fieldset>
}

如果您想使用EditorFor助手生成文件输入,可以使用以下内容:

<div class="editor-label">
    @Html.LabelFor(model => model.ImageToUpload)
</div>
<div class="editor-field">
    @Html.EditorFor(model => model.ImageToUpload)
</div>

然后为HttpPostedFileBase类型定义自定义编辑器模板(请参阅下文,您需要修改模型以实际使用此类型)。那么~/Views/Shared/EditorTemplates/HttpPostedFileBase.cshtml中的编辑器模板:

@model HttpPostedFileBase
@Html.TextBox("", null, new { type = "file" })

并在您的视图模型上使用HttpPostedFileBase类型,并确保该属性的名称与表单上输入的文件名相匹配:

public class ImageEditViewModel
{
    public int CollectionId { get; set; }

    public string Description { get; set; }

    public HttpPostedFileBase ImageToUpload { get; set; }

    public int Order { get; set; }
}

另请务必查看following blog post