MVC4 图片上传

新增

new { enctype = "multipart/form-data" } 这个必须要有
@using (Html.BeginForm(Html.BeginForm("Create", "UserInfo", FormMethod.Post, new { enctype = "multipart/form-data" })))
{

<div class="editor-label">
<span>图片</span>
</div>
<div class="editor-field">
<input type="file" name="filImgs"/>
@* <input type="hidden" name="ImgUrl" value="@Model.img"/>*@

</div>
<p>
<input type="submit" value="上传" />
</p>

}

　　

[HttpPost]
public ActionResult Create(UserInfo userinfo)
{
var file = Request.Files[0];

var img = //处理图片

userinfo.img = img;

try
{
if (ModelState.IsValid)
{
db.userinfo.Add(userinfo);
db.SaveChanges();
return RedirectToAction("Index");
}
else
{
throw new Exception();

}
}
catch (Exception)
{

return View("Create");
}

}

　　

编辑

new { enctype = "multipart/form-data" } 这个必须要有
@using (Html.BeginForm(Html.BeginForm("edit", "UserInfo", FormMethod.Post, new { enctype = "multipart/form-data" })))
{

<div class="editor-label">
<span>图片</span>
</div>
<div class="editor-field">
<input type="file" name="filImgs"/>
@* <input type="hidden" name="ImgUrl" value="@Model.img"/>*@

</div>
<p>
<input type="submit" value="修改" />
</p>

}

[HttpPost]
public ActionResult Edit(int id,UserInfo user)
{

var userinfo = db.userinfo.Find(id);
//ModelState.IsValid,此处相当于后台验证，防止前台验证因为各种情况被跳过或失效
try
{
bool updateRes = TryUpdateModel(userinfo);//如果字段符合则会赋值，否则保持原有

if (updateRes)
{
//图片
var file = Request.Files[];
var img =// 图片处理
if (img.Length>)
{
userinfo.img = img;
}

db.SaveChanges();
return RedirectToAction("Index");
}
else
{

ModelState.AddModelError("", "更新失败!");
return View(userinfo);
}

}
catch (Exception)
{

return View(userinfo);
}

}