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ASP.NET MVC4使用MongoDB制作相册管理实例分享

TIPS:1.Image转成Base64保存到mongodb字段

2.数据模型是嵌套的关联 

首先定义Model层: 

public class Photo : IEquatable<Photo>

  {

    [Required]

    public string PhotoName { get; set; }

    [Required]

    public string PhotoDescription { get; set; }

    public string ServerPath { get; set; }

    public Photo() { }

    public Photo(string name, string desc)

    {

      PhotoName = name;

      PhotoDescription = desc;

    }

    public bool Equals(Photo other)

    {

      return string.Equals(PhotoName, other.PhotoName);

    }

  }

public interface IAlbumIterable

  {

    bool HasNext();

    Photo Current();

    Photo Next();

  }  

  public interface IPhotosAggregable

  {

    IAlbumIterable GetIterator();

  }

 public class AlbumIterator : IAlbumIterable

  {

    private Album collection;

    private int count;

    public AlbumIterator(Album album)

    {

      collection = album;

    }

    public Photo Current()

    {

      if (count < collection.Count)

        return collection[count++];

      else

        throw new IndexOutOfRangeException();

    }

    public bool HasNext()

    {

      if (count < collection.Count - 1)

        return true;

      else

        return false;

    }

    public Photo Next()

    {

      if (HasNext())

        return collection[++count];

      else

        throw new IndexOutOfRangeException();

    }

  } 

 public class Album : IPhotosAggregable

  {

    [BsonId]

    public ObjectId Id { get; set; }

    [Required]

    public string Name { get; set; }

    [Required]

    public string Description { get; set; }

    public string Owner { get; set; }

    public Photo TitlePhoto { get; set; }

    [BsonDateTimeOptions(Kind = DateTimeKind.Local,Representation =BsonType.DateTime)]

    public DateTime CreationTime { get; set; }

    public IList<Photo> Pictures { get; set; }

    public Album() { Pictures = new List<Photo>(); TitlePhoto = new Photo(); }

    public Album(string name, string owner, Photo pic)

    {

      Name = name;

      Owner = owner;

      TitlePhoto = pic;

      Pictures = new List<Photo>();

      TitlePhoto = new Photo();

    }

    public bool InsertPicture(Photo pic)

    {

      if (!Pictures.Contains(pic))

      {

        Pictures.Add(pic);

        return true;

      }

      else

        throw new ArgumentException();

    }

    public bool InsertPictures(List<Photo> photos)

    {

      foreach(var photo in photos)

      {

        if (!Pictures.Contains(photo))

        {

          Pictures.Add(photo);

        }

        else

          throw new ArgumentException();

      }

      return true;

    }

    public bool RemovePicture(Photo pic)

    {

        Pictures.Remove(pic);

        return true;

    }

    public int Count

    {

      get { return Pictures.Count; }

    }

    public Photo this[int index]

    {

      get { return Pictures[index]; }

      set { Pictures[index] = value; }

    }

    public IAlbumIterable GetIterator()

    {

      return new AlbumIterator(this);

    }

  }

Services层的MongoAlbumPerformer.cs和ServerPathFinder.cs代码如下: 

public class MongoAlbumPerformer

 {

   protected static IMongoClient client;

   protected static IMongoDatabase database;

   private static IMongoCollection<Album> collection;

   private string collectionName;

   public MongoAlbumPerformer(string databaseName, string collectionName)

   {

     client = new MongoClient(ConfigurationManager.ConnectionStrings["mongoDB"].ConnectionString);

     database = client.GetDatabase(databaseName);

     this.collectionName = collectionName;

     collection = database.GetCollection<Album>(collectionName, new MongoCollectionSettings { AssignIdOnInsert = true });

   }

   public void SetCollection(string collectionName)

   {

     this.collectionName = collectionName;

     collection = database.GetCollection<Album>(collectionName);

   }

   public void CreateAlbum(Album album)

   {

     var document = new Album

     {

       Name = album.Name,

       Owner = HttpContext.Current.User.Identity.Name,

       Description = album.Description,

       CreationTime = DateTime.Now,

       TitlePhoto = album.TitlePhoto,

       Pictures = album.Pictures

     };

     collection.InsertOne(document);

   }

   public List<Album> GetAlbumsByUserName(string username)

   {

     var projection = Builders<Album>.Projection

       .Include(a => a.Name)

       .Include(a => a.Description)

       .Include(a => a.TitlePhoto)

       .Include(a=>a.CreationTime);

     var result = collection

       .Find(a => a.Owner == HttpContext.Current.User.Identity.Name)

       .Project<Album>(projection).ToList();

     return result;

   }

   public Album GetPicturesByAlbumName(string albumName)

   {

     var projection = Builders<Album>.Projection

       .Include(a => a.Pictures);

     var result = collection

       .Find(a => a.Owner == HttpContext.Current.User.Identity.Name & a.Name == albumName)

       .Project<Album>(projection).FirstOrDefault();

     return result;

   }

   public void UpdateAlbumAddPhoto(string albumName, Photo photo)

   {

     var builder = Builders<Album>.Filter;

     var filter = builder.Eq(f => f.Name, albumName) & builder.Eq(f => f.Owner, HttpContext.Current.User.Identity.Name);

     var result = collection.Find(filter).FirstOrDefault();

     if (result == null)

       throw new ArgumentException("No album of supplied name: {0}", albumName);

     else

     {

           var picture = new Photo

           {

             PhotoName = photo.PhotoName,

             PhotoDescription = photo.PhotoDescription,

             ServerPath = photo.ServerPath,

           };

           var update = Builders<Album>.Update.Push(a => a.Pictures, picture);

           collection.UpdateOne(filter, update, new UpdateOptions { IsUpsert=true });

     }

   }

   public void DeletePhotoFromAlbum(string albumName, string photoName)

   {

     var builder = Builders<Album>.Filter;

     var filter = builder.Eq(f => f.Name, albumName) & builder.Eq(f => f.Owner, HttpContext.Current.User.Identity.Name);

     var result = collection.Find(filter).SingleOrDefault();

     if (result == null)

       throw new ArgumentException("No album of supplied name: {0}", albumName);

     else

     {

       var update = Builders<Album>.Update

         .PullFilter(a => a.Pictures, Builders<Photo>.Filter.Eq(p => p.PhotoName, photoName));

       long count = collection.UpdateOne(filter, update).MatchedCount;

     }

   }

 }public class ServerPathFinder

 {

   public string GetBase64ImageString(HttpPostedFileBase file)

   {

     string mime = Regex.Match(file.ContentType, @"(?<=image/)\w+").Value;

     byte[] bytes = new byte[file.ContentLength];

     file.InputStream.Read(bytes, 0, file.ContentLength);

     return string.Format("data:image/{0};base64,{1}",mime, Convert.ToBase64String(bytes));

   }

 }

AlbumController.cs代码如下: 

public class AlbumController : Controller

 {

  MongoAlbumPerformer mongod = new MongoAlbumPerformer("test","albums");

   [HttpPost]

   public ActionResult AlbumPreview(Photo model, HttpPostedFileBase file, string albumName, string delete, string phot)

   {

     if (delete == "false")

     {

       if (file != null)

       {

         if (!file.ContentType.StartsWith("image"))

         {

           ModelState.AddModelError("file", "选择正确的格式照片！");

         }

         else

         {

           ServerPathFinder finder = new ServerPathFinder();

           model.ServerPath = finder.GetBase64ImageString(file);

         }

         if (ModelState.IsValid)

         {

           mongod.UpdateAlbumAddPhoto(albumName, model);

           ModelState.Clear();

         }

       }

     }

     else

     {

       mongod.DeletePhotoFromAlbum(albumName, phot);

       foreach(var error in ModelState.Values)

       {

         error.Errors.Clear();

       }

     }

     ViewBag.AlbumTitle = albumName;

     ViewBag.PhotoList = mongod.GetPicturesByAlbumName(albumName).Pictures;

     return View();

   }

   public ActionResult AlbumPreview(string Name)

   {

     var album = mongod.GetPicturesByAlbumName(Name);

     ViewBag.AlbumTitle = Name;

     ViewBag.PhotoList = album.Pictures;

     return View();

   }

   [HttpPost]

   public ActionResult Create(Album model, HttpPostedFileBase file)

   {

     if (!file.ContentType.StartsWith("image"))

     {

       ModelState.AddModelError("file", "选择正确的格式照片！");

     }

     else

     {

       ServerPathFinder finder = new ServerPathFinder();

       model.TitlePhoto.ServerPath = finder.GetBase64ImageString(file);        

     }

     if (ModelState.IsValid)

     {

       model.Owner = HttpContext.User.Identity.Name;

       mongod.CreateAlbum(model);

     }

     var albums = mongod.GetAlbumsByUserName(HttpContext.User.Identity.Name);

     ViewBag.Albums = albums;

     return View();

   }

   public ActionResult Create()

   {

     var albums = mongod.GetAlbumsByUserName(HttpContext.User.Identity.Name);

     ViewBag.Albums = albums;

     return View();

   }

 } 

部分view视图:

Create.cshtml 

@{

  ViewBag.Title = "Create";

}

<h2>我的相册</h2>

@Html.Partial("_MyAlbums", (List<Album>)ViewBag.Albums)

@using (Html.BeginForm("Create", "Album", FormMethod.Post, new { enctype = "multipart/form-data" })) 

{

  @Html.AntiForgeryToken()

  <div class="form-horizontal">

    <h4>创建新相册： </h4>

    <hr />

    @Html.ValidationSummary(true, "", new { @class = "text-danger" })

    <div class="form-group">

      @Html.LabelFor(model => model.Name, htmlAttributes: new { @class = "control-label col-md-2" })

      <div class="col-md-10">

        @Html.EditorFor(model => model.Name, new { htmlAttributes = new { @class = "form-control" } })

        @Html.ValidationMessageFor(model => model.Name, "", new { @class = "text-danger" })

      </div>

    </div>

    <div class="form-group">

      @Html.LabelFor(model => model.Description, htmlAttributes: new { @class = "control-label col-md-2" })

      <div class="col-md-10">

        @Html.EditorFor(model => model.Description, new { htmlAttributes = new { @class = "form-control" } })

        @Html.ValidationMessageFor(model => model.Description, "", new { @class = "text-danger" })

      </div>

    </div>

    <div class="form-group">

      @Html.LabelFor(model => model.TitlePhoto, htmlAttributes: new { @class = "control-label col-md-2" })

      <div class="col-md-10">

        <input type="file" name="file" id="file" style="width: 100%;" data-val="true" data-val-required="要求标题图片."/>

        @Html.ValidationMessage("file",new { @class = "text-danger" })

      </div>

    </div>

    <div class="form-group">

      <div class="col-md-offset-2 col-md-10">

        <input type="submit" value="Create" class="btn btn-default" />

      </div>

    </div>

  </div>

}

@section scripts{

  @Scripts.Render("~/bundles/jqueryval")

  <script type="text/javascript">

    $('img').click(function (data) {

    });

  </script>

}AlbumPreview.cshtml

 @{

  ViewBag.Title = "AlbumPreview";

}

@using (Html.BeginForm("AlbumPreview", "Album", FormMethod.Post, new { enctype = "multipart/form-data"}))

{

  @Html.AntiForgeryToken()

  {Html.RenderPartial("_Preview", (List<Photo>)ViewBag.PhotoList);}

  <div class="form-horizontal">

    <br />

    <h4>添加新的照片：</h4>

    <hr />

    @Html.ValidationSummary(true, "", new { @class = "text-danger" })

    <div class="form-group">

      @Html.LabelFor(model => model.PhotoName, htmlAttributes: new { @class = "control-label col-md-2" })

      <div class="col-md-10">

        @Html.EditorFor(model => model.PhotoName, new { htmlAttributes = new { @class = "form-control" } })

        @Html.ValidationMessageFor(model => model.PhotoName, "", new { @class = "text-danger" })

      </div>

    </div>

    <div class="form-group">

      @Html.LabelFor(model => model.PhotoDescription, htmlAttributes: new { @class = "control-label col-md-2" })

      <div class="col-md-10">

        @Html.EditorFor(model => model.PhotoDescription, new { htmlAttributes = new { @class = "form-control" } })

        @Html.ValidationMessageFor(model => model.PhotoDescription, "", new { @class = "text-danger" })

      </div>

    </div>

    <div class="form-group">

      <label class="control-label col-md-2">选择照片：</label>

      <div class="col-md-10">

        <input type="file" name="file" id="file" style="width: 100%;" data-val="true" data-val-required="请选择图像" />

        @Html.ValidationMessage("file", new { @class = "text-danger" })

      </div>

    </div>

    <div class="form-group">

      <div class="col-md-offset-2 col-md-10">

        <input type="submit" value="Create" class="btn btn-default" />

      </div>

    </div>

  </div>

  <input type="hidden" name="albumName" id="albumName" value="@ViewBag.AlbumTitle" />

  <input type="hidden" name="delete" id="delete" value="false" />

  <input type="hidden" name="phot" id="phot" value="sraka" />

}

@section scripts{

  @Scripts.Render("~/bundles/jqueryval")

  <script type="text/javascript">

    $(document).ready(function () {

      var elements = document.getElementsByClassName("btn btn-xs btn-warning cancel");

      for (var i = 0, len = elements.length; i < len; i++) {

        elements[i].addEventListener("click", function () {

          $('#delete').val(true);

          var name = $(this).attr("id");

          $('#phot').val(name);

          $('#' + name).click();

        });

      }

    })

  </script>

}_Preview.cshtml

 @{

  ViewBag.Title = "_Preview";

}

<h2>Album <span style="color:royalblue;font-style:italic">@ViewBag.AlbumTitle</span></h2>

<div class="row">

@foreach (var photo in Model)

{

  <div class="col-md-3">

    <input type="submit" id="@photo.PhotoName" value="删除" class="btn btn-xs btn-warning cancel" style="text-align:center;float:right" />

    <img src="@photo.ServerPath" class="img-responsive img-thumbnail col-md-3" style="width:100%;height:180px" />

    <label style="text-align:center;width:100%">@Html.DisplayNameFor(phot=>phot.PhotoName): @photo.PhotoName</label>

    <label style="text-align:center;width:100%;font-weight:100">@photo.PhotoDescription</label>

  </div>

}

</div>

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