【发布时间】：2014-10-14 11:08:04
【问题描述】：
我有这个：
控制器：
[HttpPost]
public ActionResult Edit(UserProfile userprofile, HttpPostedFileBase file)
{
if (file != null && file.ContentLength > 0)
{
// extract only the fielname
var fileName = Path.GetFileName(file.FileName);
// store the file inside ~/App_Data/uploads folder
var path = Path.Combine(Server.MapPath("~/App_Data/uploads"), fileName);
path = Url.Content(Path.Combine("~/~/App_Data/uploads", fileName));
file.SaveAs(path);
}
if (ModelState.IsValid)
{
string username = User.Identity.Name;
// Get the userprofile
UserProfile user = db.userProfiles.FirstOrDefault(u => u.UserName.Equals(username));
// Update fields
user.Image = new byte[file.ContentLength];
file.InputStream.Read(user.Image, 0, file.ContentLength);
user.FirstName = userprofile.FirstName;
user.LastName = userprofile.LastName;
user.Email = userprofile.Email;
user.Motto = userprofile.Motto;
user.PlaceOfBirth = userprofile.PlaceOfBirth;
user.HowManyBikes = userprofile.HowManyBikes;
user.BesideYourBeth = userprofile.BesideYourBeth;
user.NicestRide = userprofile.NicestRide;
user.WorstRide = userprofile.WorstRide;
user.AmountKmPerYear = userprofile.AmountKmPerYear;
user.AverageSpeed = userprofile.AverageSpeed;
user.AbleToChatWhileRiding = userprofile.AbleToChatWhileRiding;
user.PhoneNumber = userprofile.PhoneNumber;
db.Entry(user).State = EntityState.Modified;
db.SaveChanges();
return RedirectToAction("Edit", "Account");
}
return View(userprofile);
}
并查看：
@foreach (var item in Model)
{
<tr>
<td>
@Html.DisplayFor(modelItem => item.LastName)
</td>
<td>
@Html.DisplayFor(modelItem => item.FirstName)
</td>
<td>
@Html.DisplayFor(modelItem => item.Motto)
</td>
<td>
@Html.DisplayFor(modelItem => item.PlaceOfBirth)
</td>
<td><img width="200px" height="150px" src="@Url.Content(item.Image)" /></td>
<td>
@Html.ActionLink("Details", "Details", new { id = item.Id })
</td>
</tr>
}
</table>
</div>
</div>
<br />
Page @(Model.PageCount < Model.PageNumber ? 0 : Model.PageNumber) of @Model.PageCount
@Html.PagedListPager(Model, page => Url.Action("Index",
new { page, sortOrder = ViewBag.CurrentSort, currentFilter = ViewBag.CurrentFilter }))
所以我想在索引文件中显示图像，作为缩略图。图像已经保存在数据库中，我尝试像这样显示图像：
<td><img width="200px" height="150px" src="@Url.Content(item.Image)" /></td> 但这不起作用。
感谢您的帮助
我有索引，像这样：
@foreach (var item in Model)
{
<tr>
<td>
@Html.DisplayFor(modelItem => item.LastName)
</td>
<td>
@Html.DisplayFor(modelItem => item.FirstName)
</td>
<td>
@Html.DisplayFor(modelItem => item.Motto)
</td>
<td>
@Html.DisplayFor(modelItem => item.PlaceOfBirth)
</td>
<td>
<img width="200" height="150" src="@Url.Action("GetImage", "Account", new { item.Id })">
</td>
<td>
@Html.ActionLink("Details", "Details", new { id = item.Id })
</td>
</tr>
}
但我在 chrome 中查看的尺寸是：img 74x22，而且也很奇怪，因为图像来自：
img {
background-image: url('../Images/Large.JPG');
background-repeat: no-repeat;
background-position: top;
background-size: cover;
width: 100%;
height: 100%;
因此，对于每个配置文件，图像都是相同的，但图像存储在：~/App_Data/uploads。
好吧，我在 site.css 中取消了 img{} 的注释，现在我看到了正确的尺寸，但是图像损坏了
GET http://localhost:41787/Account/GetImage/34 500 (Internal Server Error) Account:179
event.returnValue is deprecated. Please use the standard event.preventDefault() instead.
accountController 现在看起来像这样：
[HttpPost]
public ActionResult Edit(UserProfile userprofile, HttpPostedFileBase file)
{
if (file != null && file.ContentLength > 0)
{
// extract only the fielname
var fileName = Path.GetFileName(file.FileName);
// store the file inside ~/App_Data/uploads folder
var path = Path.Combine(Server.MapPath("~/App_Data/uploads"), fileName);
// path = Url.Content(Path.Combine("~/~/App_Data/uploads", fileName));
file.SaveAs(path);
}
if (ModelState.IsValid)
{
string username = User.Identity.Name;
// Get the userprofile
UserProfile user = db.userProfiles.FirstOrDefault(u => u.UserName.Equals(username));
// Update fields
user.Image = new byte[file.ContentLength];
file.InputStream.Read(user.Image, 0, file.ContentLength);
user.ImageMimeType = file.ContentType;
user.FirstName = userprofile.FirstName;
user.LastName = userprofile.LastName;
user.Email = userprofile.Email;
user.Motto = userprofile.Motto;
user.PlaceOfBirth = userprofile.PlaceOfBirth;
user.HowManyBikes = userprofile.HowManyBikes;
user.BesideYourBeth = userprofile.BesideYourBeth;
user.NicestRide = userprofile.NicestRide;
user.WorstRide = userprofile.WorstRide;
user.AmountKmPerYear = userprofile.AmountKmPerYear;
user.AverageSpeed = userprofile.AverageSpeed;
user.AbleToChatWhileRiding = userprofile.AbleToChatWhileRiding;
user.PhoneNumber = userprofile.PhoneNumber;
db.Entry(user).State = EntityState.Modified;
db.SaveChanges();
return RedirectToAction("Edit", "Account");
}
return View(userprofile);
}
public FileContentResult GetImage(int itemId)
{
UserProfile user = db.userProfiles.FirstOrDefault(u => u.Id.Equals(itemId));
if (user != null)
return File(user.Image, user.ImageMimeType);
else return null;
}
和视图（Index.cshtml）：
@foreach (var item in Model)
{
<tr>
<td>
@Html.DisplayFor(modelItem => item.LastName)
</td>
<td>
@Html.DisplayFor(modelItem => item.FirstName)
</td>
<td>
@Html.DisplayFor(modelItem => item.Motto)
</td>
<td>
@Html.DisplayFor(modelItem => item.PlaceOfBirth)
</td>
<td>
<img width="200" height="150" src='@Url.Action("GetImage", "Account", new { item.Id }, Request.Url.Scheme)'>
</td>
<td>
@Html.ActionLink("Details", "Details", new { id = item.Id })
</td>
</tr>
}
但这是正确的吗？？
<td>
<img alt="" src="@Url.Action("GetImage", "Account", new {item.Id })" width="200" height="150" class="Image" />
</td>
【问题讨论】：
标签： c# asp.net entity-framework razorengine