MongoDB入门（8）- c#通过操作MongoDB GridFS实现文件的数据库存储

GridFS介绍

GridFS是MongoDB中的一个内置功能，可以用于存放大量小文件。

GridFS

GridFS长啥样

/* 1 */
{
    "_id" : ObjectId("57302e18d9673e5bf4a4d3c6"),
    "filename" : "字段.txt",
    "aliases" : null,
    "chunkSize" : NumberLong(262144),
    "uploadDate" : ISODate("2016-05-09T06:28:40.672Z"),
    "length" : NumberLong(1672),
    "contentType" : null,
    "md5" : "2f85982b0fafcbfe6a3c9387ba49ea3b"
}

/* 2 */
{
    "_id" : ObjectId("57305107d96797bb9f96ed9f"),
    "filename" : "字段.txt",
    "aliases" : null,
    "chunkSize" : NumberLong(262144),
    "uploadDate" : ISODate("2016-05-09T08:57:43.277Z"),
    "length" : NumberLong(1672),
    "contentType" : null,
    "md5" : "2f85982b0fafcbfe6a3c9387ba49ea3b"
}

/* 3 */
{
    "_id" : ObjectId("573051d7d96700d357e6706f"),
    "filename" : "字段.txt",
    "aliases" : null,
    "chunkSize" : NumberLong(262144),
    "uploadDate" : ISODate("2016-05-09T09:01:11.060Z"),
    "length" : NumberLong(1672),
    "contentType" : null,
    "md5" : "2f85982b0fafcbfe6a3c9387ba49ea3b"
}

源码

using MongoDB.Driver;
using MongoDB.Driver.GridFS;
using System.IO;

namespace Wisdombud.Mongo
{
    /// <summary>
    ///
    /// </summary>
    public class MongoFileBll
    {
        private MongoDatabase repository;
        /// <summary>
        ///
        /// </summary>
        /// <returns></returns>
        public MongoCursor<MongoGridFSFileInfo> FindAll()
        {
            return this.repository.GetGridFS(MongoGridFSSettings.Defaults).FindAll();
        }
        /// <summary>
        ///
        /// </summary>
        /// <param name="pConnectionstring"></param>
        public MongoFileBll(string pConnectionstring)
        {
            MongoUrl mongourl = MongoUrl.Create(pConnectionstring);
            var client = new MongoClient(mongourl);
            MongoServer server = client.GetServer();
            this.repository = server.GetDatabase(mongourl.DatabaseName);
        }
        /// <summary>
        ///
        /// </summary>
        /// <param name="filePath"></param>
        public void UploadFile(string filePath)
        {
            FileInfo fi = new FileInfo(filePath);
            this.repository.GetGridFS(MongoGridFSSettings.Defaults).Upload(filePath, fi.Name);
        }
        /// <summary>
        ///
        /// </summary>
        /// <param name="filePath"></param>
        /// <param name="fileName"></param>

        public void UploadFile(string filePath, string fileName)
        {
            this.repository.GetGridFS(MongoGridFSSettings.Defaults).Upload(filePath, fileName);
        }

        /// <summary>
        ///
        /// </summary>
        /// <param name="fileName"></param>
        /// <param name="filePath"></param>
        public void DownloadFile(string fileName)
        {
            this.repository.GetGridFS(MongoGridFSSettings.Defaults).Download(fileName);
        }
        /// <summary>
        ///
        /// </summary>
        /// <param name="fileName"></param>
        public void DeleteFile(string fileName)
        {
            this.repository.GetGridFS(MongoGridFSSettings.Defaults).Delete(fileName);
        }
        /// <summary>
        ///
        /// </summary>
        public void DeleteAll()
        {
            foreach (var inst in this.repository.GetGridFS(MongoGridFSSettings.Defaults).FindAll())
            {
                inst.Delete();
            }
        }
    }
}

这个源码持续更新中

用法

MongoFileBll tl = new MongoFileBll("mongodb://127.0.0.1:27017/chzhaotest");
string folder = @"D:\Wisdombud\2016\20160324_Wisdombud.Mongo\SourceCode\Wisdombud.Mongo.Sample\bin\Debug";
DirectoryInfo di = new DirectoryInfo(folder);
foreach (var file in di.GetFiles())
{
    tl.UploadFile(file.FullName, Guid.NewGuid().ToString());
}
var aaa = tl.FindAll();
foreach (var inst in aaa)
{
    Console.WriteLine(inst.Name);
}