@H_301_1@我已在项目的“内容/学生/照片”文件夹中成功上传照片,但无法在“索引”视图中显示这些照片.
这是我的简短代码：
模型：
public string FirstName { get; set; }
[Display(Name = "Upload Image")]
[NotMapped]
public HttpPostedFileBase Photo { get; set; }
索引视图(用于显示)：
@Html.DisplayNameFor(model => model.FirstName)
@Html.DisplayNameFor(model => model.Photo)
@foreach (var item in Model)
{
@Html.DisplayFor(modelItem => item.FirstName)
@Html.DisplayFor(modelItem => item.Photo)
}
应该在索引视图中进行哪些更改？
解决方法
尝试这个.
模型：
public byte[] ImageData { get; set; }
[HiddenInput(DisplayValue = false)]
public string ImageMimeType { get; set; }
视图：
@using (Html.BeginForm("Edit","Admin",FormMethod.Post,new { enctype = "multipart/form-data" })) {
@Html.EditorForModel()
<div class="editor-label">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")
}
控制器：
[HttpPost]
public ActionResult Edit(Product product,HttpPostedFileBase image) {
if (ModelState.IsValid) {
if (image != null) {
product.ImageMimeType = image.ContentType;
product.ImageData = new byte[image.ContentLength];
image.InputStream.Read(product.ImageData,image.ContentLength);
}
repository.SaveProduct(product);
TempData["message"] = string.Format("{0} has been saved",product.Name);
return RedirectToAction("Index");
} else {
// there is something wrong with the data values
return View(product);
}
}
public void SaveProduct(Product product) {
if (product.ProductID == 0) {
context.Products.Add(product);
} else {
Product dbEntry = context.Products.Find(product.ProductID);
if (dbEntry != null) {
dbEntry.Name = product.Name;
dbEntry.Description = product.Description;
dbEntry.Price = product.Price;
dbEntry.Category = product.Category;
dbEntry.ImageData = product.ImageData;
dbEntry.ImageMimeType = product.ImageMimeType;
}
}
context.SaveChanges();
}
public FileContentResult GetImage(int productId) {
Product prod = repository.Products.FirstOrDefault(p => p.ProductID == productId);
if (prod != null) {
return File(prod.ImageData,prod.ImageMimeType);
} else {
return null;
}
}
希望这可以帮助…
