在ASP.NET MVC中添加圖像到數據庫5

Question

我試圖添加一個圖像到數據庫表使用ASP.NET MVC與實體框架。

我已經對名爲'AspNetUsers'的現有ASP.NET MVC表進行了遷移，並在其中添加了一些新列。

其中一列是ProfilePicture，它是byte []類型。

當我試圖註冊新用戶時，我期待該用戶提供其他數據中的個人資料圖片。

這裏是ApplicationUser類新增加的屬性：

public class ApplicationUsers : IdentityUser 
    { 
     public string Name { get; set; } 
     public string LastName { get; set; } 
     public string City { get; set; } 
     public string DateOfBirth { get; set; } 
     public byte[] ProfilePicture { get; set; } 

     public async Task<ClaimsIdentity> GenerateUserIdentityAsync(UserManager<ApplicationUsers> manager) 
     { 
      // Note the authenticationType must match the one defined in CookieAuthenticationOptions.AuthenticationType 
      var userIdentity = await manager.CreateIdentityAsync(this, DefaultAuthenticationTypes.ApplicationCookie); 
      // Add custom user claims here 
      return userIdentity; 
     } 
    } 

以獲取圖像到表中我使用的是名爲ExtendedIdentityModels類包裝。該類繼承自RegisterViewModel類，它只有一個屬性UserProfilePicture，類型爲HttpPostedFileBase，用於從用戶頁面獲取圖像。

public class ExtendedIdentityModels : RegisterViewModel 
    { 
     public HttpPostedFileBase UserProfilePicture { get; set; } 
    } 

我已經改變了註冊方法在控制這一新的屬性添加到數據庫：

[HttpPost] 
    [AllowAnonymous] 
    [ValidateAntiForgeryToken] 
    public async Task<ActionResult> Register(ExtendedIdentityModels model) 
    { 
     if (ModelState.IsValid) 
     { 
      if (model.UserProfilePicture != null) 
      { 
       if (model.UserProfilePicture.ContentLength > (4 * 1024 * 1024)) 
       { 
         ModelState.AddModelError("CustomError", "Image can not be lager than 4MB."); 
          return View(); 
       } 
       if (!(model.UserProfilePicture.ContentType == "image/jpeg" || model.UserProfilePicture.ContentType == "image/gif")) 
       { 
        ModelState.AddModelError("CustomError", "Image must be in jpeg or gif format."); 
       } 
      } 
      byte[] data = new byte[model.UserProfilePicture.ContentLength]; 
      model.UserProfilePicture.InputStream.Read(data, 0, model.UserProfilePicture.ContentLength); 
      var user = new ApplicationUsers() { UserName = model.Email, Email = model.Email, Name = model.Name, LastName = model.LastName, City = model.City, DateOfBirth = model.DateOfBirth.ToString(), ProfilePicture = data }; 
      var result = await UserManager.CreateAsync(user, model.Password); 
      if (result.Succeeded) 
      { 
       await SignInManager.SignInAsync(user, isPersistent: false, rememberBrowser: false); 

         return RedirectToAction("Index", "Home"); 
      } 
         AddErrors(result); 

       } 
       // If we got this far, something failed, redisplay form 
       return View(model); 
} 

對於我用下面查看用戶交互，這個代碼的底部是一個部分添加ProfilePicture。

@model StudentBookApp.Models.ExtendedIdentityModels 
@{ 
    ViewBag.Title = "Register"; 
} 

@*<link rel="stylesheet" href="//code.jquery.com/ui/1.11.2/themes/smoothness/jquery-ui.css"> 
<script src="//code.jquery.com/ui/1.11.2/jquery-ui.js"></script>*@ 

<link href="~/Content/datepicker.css" rel="stylesheet" /> 
<script src="~/Scripts/bootstrap-datepicker.js"></script> 
<h2>@ViewBag.Title.</h2> 

@using (Html.BeginForm("Register", "Account", FormMethod.Post, new { @class = "form-horizontal", role = "form" })) 
{ 
    @Html.AntiForgeryToken() 
    <h4>Create a new account.</h4> 
    <hr /> 
    @Html.ValidationSummary("", new { @class = "text-danger" }) 

    <div class="form-group"> 
     @Html.LabelFor(m => m.Name, new { @class = "col-md-2 control-label" }) 
     <div class="col-md-10"> 
      @Html.TextBoxFor(m => m.Name, new { @class = "form-control" }) 
     </div> 
    </div> 
    <div class="form-group"> 
     @Html.LabelFor(m => m.LastName, new { @class = "col-md-2 control-label" }) 
     <div class="col-md-10"> 
      @Html.TextBoxFor(m => m.LastName, new { @class = "form-control " }) 
     </div> 
    </div> 
    <div class="form-group"> 
     @Html.LabelFor(m => m.City, new { @class = "col-md-2 control-label" }) 
     <div class="col-md-10"> 
      @Html.TextBoxFor(m => m.City, new { @class = "form-control" }) 
     </div> 
    </div> 
    <div class="form-group"> 
     @Html.LabelFor(m => m.DateOfBirth, new { @class = "col-md-2 control-label" }) 
     <div class="col-md-10"> 
      @Html.TextBoxFor(m => m.DateOfBirth, new { @class = "datepicker form-control" }) 
     </div> 
    </div> 
    <div class="form-group"> 
     @Html.LabelFor(m => m.Email, new { @class = "col-md-2 control-label" }) 
     <div class="col-md-10"> 
      @Html.TextBoxFor(m => m.Email, new { @class = "form-control" }) 
     </div> 
    </div> 
    <div class="form-group"> 
     @Html.LabelFor(m => m.Password, new { @class = "col-md-2 control-label" }) 
     <div class="col-md-10"> 
      @Html.PasswordFor(m => m.Password, new { @class = "form-control" }) 
     </div> 
    </div> 
    <div class="form-group"> 
     @Html.LabelFor(m => m.ConfirmPassword, new { @class = "col-md-2 control-label" }) 
     <div class="col-md-10"> 
      @Html.PasswordFor(m => m.ConfirmPassword, new { @class = "form-control" }) 
     </div> 
    </div> 
    <div class="form-group"> 
     @Html.LabelFor(m => m.ProfilePicture, new { @class = "col-md-2 control-label"}) 
     <div class="col-md-10"> 
      @Html.TextBoxFor(m => m.UserProfilePicture, new {type = "file"}) 
      @Html.ValidationMessage("CustomMessage") 
     </div> 
    </div> 
    <div class="form-group"> 
     <div class="col-md-offset-2 col-md-10"> 
      <input type="submit" class="btn btn-default" value="Register" /> 
     </div> 
    </div> 
} 

<script type="text/javascript"> 

    $(function() { 
     $('.datepicker').datepicker(); 
    }) 
</script> 

幾乎一切順利，但對於model.UserProfilePicture我得到空值。由於某些原因，它無法通過View。我做錯了什麼？我一直堅持幾個小時試圖找到可能的錯誤，但沒有成功。這種用於插入圖像的「機制」用於在MVC 4中很好地工作...有人看到我失去了什麼，這種方法有什麼問題嗎？

Answer 1

與MVC或c＃無關，它是HTML;）/編輯還要感謝您提出問題中的所有細節，因爲它非常全面。

你的表單需要ENCTYPE = 「的multipart/form-data的」

@using (Html.BeginForm("Register", "Account", FormMethod.Post, new { @class = "form-horizontal", role = "form", enctype="multipart/form-data" })) 

Answer 2

public ActionResult AddImage(Brand model,HttpPostedFileBase image1) 
     { 
      var db = new H_Cloths_SaloonEntities(); 
      if (image1!=null) 
      { 

       model.Brandimage = new byte[image1.ContentLength]; 
       image1.InputStream.Read(model.Brandimage,0,image1.ContentLength); 
      } 
      db.Brands.Add(model); 
      db.SaveChanges(); 
      ViewBag.Path = "image uploaded Successfully...!"; 
      return View(model); 

     }