blocks|key|1003228|text|此示例将允许您将文档绑定到对象|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1003229|using+System;
using+System.Collections.Generic;
using+System.Linq;
using+System.Text;
using+MongoDB.Driver;
using+MongoDB.Driver.Linq;
using+MongoDB.Bson;
using+MongoDB.Driver.Builders;
using+MongoDB.Driver.GridFS;
using+System.IO;

namespace+ConsoleApplication1
{
class+Program
{
++++static+void+Main(string[]+args)
++++{
++++++++MongoServer+ms+=+MongoServer.Create();
++++++++string+_dbName+=+"docs";

++++++++MongoDatabase+md+=+ms.GetDatabase(_dbName);
++++++++if+(!md.CollectionExists(_dbName))
++++++++{
++++++++++++md.CreateCollection(_dbName);
++++++++}

++++++++MongoCollection<Doc>+_documents+=+md.GetCollection<Doc>(_dbName);
++++++++_documents.RemoveAll();
++++++++//add+file+to+GridFS

++++++++MongoGridFS+gfs+=+new+MongoGridFS(md);
++++++++MongoGridFSFileInfo+gfsi+=+gfs.Upload(@"c:\mongodb.rtf");
++++++++_documents.Insert(new+Doc()
++++++++{
++++++++++++DocId+=+gfsi.Id.AsObjectId,
++++++++++++DocName+=+@"c:\foo.rtf"
++++++++}
++++++++);

++++++++foreach+(Doc+item+in+_documents.FindAll())
++++++++{
++++++++++++ObjectId+_documentid+=+new+ObjectId(item.DocId.ToString());
++++++++++++MongoGridFSFileInfo+_fileInfo+=+md.GridFS.FindOne(Query.EQ("_id",+_documentid));
++++++++++++gfs.Download(item.DocName,+_fileInfo);
++++++++++++Console.WriteLine("Downloaded+{0}",+item.DocName);
++++++++++++Console.WriteLine("DocName+{0}+dowloaded",+item.DocName);
++++++++}

++++++++Console.ReadKey();
++++}
}

class+Doc
{
++++public+ObjectId+Id+{+get;+set;+}
++++public+string+DocName+{+get;+set;+}
++++public+ObjectId+DocId+{+get;+set;+}
}|code-block|syntax|javascript|1003230|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

This example will allow you to tie a document to an object

<pre><code>using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using MongoDB.Driver;
using MongoDB.Driver.Linq;
using MongoDB.Bson;
using MongoDB.Driver.Builders;
using MongoDB.Driver.GridFS;
using System.IO;

namespace ConsoleApplication1
{
class Program
{
 static void Main(string[] args)
 {
 MongoServer ms = MongoServer.Create();
 string _dbName = "docs";

 MongoDatabase md = ms.GetDatabase(_dbName);
 if (!md.CollectionExists(_dbName))
 {
 md.CreateCollection(_dbName);
 }

 MongoCollection&lt;Doc&gt; _documents = md.GetCollection&lt;Doc&gt;(_dbName);
 _documents.RemoveAll();
 //add file to GridFS

 MongoGridFS gfs = new MongoGridFS(md);
 MongoGridFSFileInfo gfsi = gfs.Upload(@"c:\mongodb.rtf");
 _documents.Insert(new Doc()
 {
 DocId = gfsi.Id.AsObjectId,
 DocName = @"c:\foo.rtf"
 }
 );

 foreach (Doc item in _documents.FindAll())
 {
 ObjectId _documentid = new ObjectId(item.DocId.ToString());
 MongoGridFSFileInfo _fileInfo = md.GridFS.FindOne(Query.EQ("_id", _documentid));
 gfs.Download(item.DocName, _fileInfo);
 Console.WriteLine("Downloaded {0}", item.DocName);
 Console.WriteLine("DocName {0} dowloaded", item.DocName);
 }

 Console.ReadKey();
 }
}

class Doc
{
 public ObjectId Id { get; set; }
 public string DocName { get; set; }
 public ObjectId DocId { get; set; }
}
</code></pre>

blocks|key|1003257|text|由于2.1+RC-0驱动程序已经发布，上述答案很快就会过时。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1003258|在v2.1+MongoDB和GridFS中使用文件的方法现在可以通过以下方式完成：|1003259|using+MongoDB.Bson;
using+MongoDB.Driver;
using+MongoDB.Driver.GridFS;
using+System.IO;
using+System.Threading.Tasks;

namespace+MongoGridFSTest
{
++++class+Program
++++{
++++++++static+void+Main(string[]+args)
++++++++{
++++++++++++var+client+=+new+MongoClient("mongodb://localhost");
++++++++++++var+database+=+client.GetDatabase("TestDB");
++++++++++++var+fs+=+new+GridFSBucket(database);

++++++++++++var+id+=+UploadFile(fs);

++++++++++++DownloadFile(fs,+id);
++++++++}

++++++++private+static+ObjectId+UploadFile(GridFSBucket+fs)
++++++++{
++++++++++++using+(var+s+=+File.OpenRead(@"c:\temp\test.txt"))
++++++++++++{
++++++++++++++++var+t+=+Task.Run<ObjectId>(()+=>+{+return+
++++++++++++++++++++fs.UploadFromStreamAsync("test.txt",+s);
++++++++++++++++});

++++++++++++++++return+t.Result;
++++++++++++}
++++++++}

++++++++private+static+void+DownloadFile(GridFSBucket+fs,+ObjectId+id)
++++++++{
++++++++++++//This+works
++++++++++++var+t+=+fs.DownloadAsBytesByNameAsync("test.txt");
++++++++++++Task.WaitAll(t);
++++++++++++var+bytes+=+t.Result;


++++++++++++//This+blows+chunks+(I+think+it's+a+driver+bug,+I'm+using+2.1+RC-0)
++++++++++++var+x+=+fs.DownloadAsBytesAsync(id);
++++++++++++Task.WaitAll(x);
++++++++}
++++}
}|code-block|syntax|javascript|1003260|这是从C#驱动程序测试here上的比较中获得的|offset|length|1003261|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/mongodb/mongo-csharp-driver/commit/0e2123aaaad8fe5ba7ae613fabf95f6f23138959^0|0|0|0|B|4|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|V|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|W|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|X|8|@]|9|@$K|Y|L|Z|1|10]]|A|$]]|$1|M|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|T]]]]

The answers above are soon to be outdated now that the 2.1 RC-0 driver has been released. 

The way to work with files in v2.1 MongoDB with GridFS can now be done this way:

<pre><code>using MongoDB.Bson;
using MongoDB.Driver;
using MongoDB.Driver.GridFS;
using System.IO;
using System.Threading.Tasks;

namespace MongoGridFSTest
{
 class Program
 {
 static void Main(string[] args)
 {
 var client = new MongoClient("mongodb://localhost");
 var database = client.GetDatabase("TestDB");
 var fs = new GridFSBucket(database);

 var id = UploadFile(fs);

 DownloadFile(fs, id);
 }

 private static ObjectId UploadFile(GridFSBucket fs)
 {
 using (var s = File.OpenRead(@"c:\temp\test.txt"))
 {
 var t = Task.Run&lt;ObjectId&gt;(() =&gt; { return 
 fs.UploadFromStreamAsync("test.txt", s);
 });

 return t.Result;
 }
 }

 private static void DownloadFile(GridFSBucket fs, ObjectId id)
 {
 //This works
 var t = fs.DownloadAsBytesByNameAsync("test.txt");
 Task.WaitAll(t);
 var bytes = t.Result;


 //This blows chunks (I think it's a driver bug, I'm using 2.1 RC-0)
 var x = fs.DownloadAsBytesAsync(id);
 Task.WaitAll(x);
 }
 }
}
</code></pre>

This is taken from a diff on the C# driver tests <a href="https://github.com/mongodb/mongo-csharp-driver/commit/0e2123aaaad8fe5ba7ae613fabf95f6f23138959">here</a>

I'm developing a web app with mongodb as my back-end. I'd like to have users upload pictures to their profiles like a linked-in profile pic. I'm using an aspx page with MVC2 and I read that GridFs library is used to store large file types as binaries. I've looked everywhere for clues as how this is done, but mongodb doesn't have any documentation for C# api or GridFs C#. I'm baffled and confused, could really use another set of brains.

Anyone one know how to actually implement a file upload controller that stores an image uploaded by a user into a mongodb collection? Thanks a million!

I've tried variations of this to no avail.

<pre><code>Database db = mongo.getDB("Blog");
GridFile file = new GridFile(db);
file.Create("image.jpg");

var images = db.GetCollection("images");
images.Insert(file.ToDocument());
</code></pre>

MongoDB GridFs with C#, how to store files such as images?

MongoDB

我正在开发一个以mongodb为后端的web应用程序。我想让用户上传图片到他们的个人资料，就像一个链接的个人资料图片。我在MVC2中使用aspx页面，我了解到GridFs库用于将大文件类型存储为二进制文件。我到处寻找如何做到这一点的线索，但mongodb没有任何关于GridFs或C# C#的文档。我既困惑又困惑，真的需...

问使用C#的MongoDB GridF，如何存储图像等文件？
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