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ASP.NET MVC4使用MongoDB制作相册管理

时间：2020-03-10 13:16     来源/作者：WuLex

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: 

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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: 

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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: 

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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 

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@{
 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:

ASP.NET MVC4使用MongoDB制作相册管理

《车》相册下的图片示例，可以增加图片，删除图片

ASP.NET MVC4使用MongoDB制作相册管理

《QQ》相册下的图片示例

ASP.NET MVC4使用MongoDB制作相册管理

mongodb数据存储结构图:

ASP.NET MVC4使用MongoDB制作相册管理

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。

标签：
asp.net mongodb MVC4 相册管理 

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