ASP.NET MVC4使用MongoDB做的相册管理

时间：2016-07-17 17:06:24 阅读：346 评论：0 收藏：0 [点我收藏+]

标签：

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>

运行项目结果如图:

首页创建相册:

技术分享