本文实例为大家分享了针对Mongodb3.3数据库中GridFS增删改查，供大家参考，具体内容如下

Program.cs代码如下:

internal class Program 
 { 
 private static void Main(string[] args) 
 { 
  GridFSHelper helper = new GridFSHelper("mongodb://localhost", "GridFSDemo", "Pictures"); 
 
  #region 上传图片 
 
  //第一种 
  //Image image = Image.FromFile("D:\dog.jpg"); 
  //byte[] imgdata = ImageHelper.ImageToBytes(image); 
  //ObjectId oid = helper.UploadGridFSFromBytes(imgdata); 
 
  //第二种 
  //Image image = Image.FromFile("D:\man.jpg"); 
  //Stream imgsteam = ImageHelper.ImageToStream(image); 
  //ObjectId oid = helper.UploadGridFSFromStream("man",imgSteam); 
  //LogHelper.WriteFile(oid.ToString()); 
  // Console.Write(oid.ToString()); 
 
  #endregion 
 
  #region 下载图片 
 
  //第一种 
  //ObjectId downId = new ObjectId("578e2d17d22aed1850c7855d"); 
  //byte[] Downdata= helper.DownloadAsByteArray(downId); 
  //string name= ImageHelper.CreateImageFromBytes("coolcar",Downdata); 
 
  //第二种 
  // byte[] Downdata = helper.DownloadAsBytesByName("QQQ"); 
  //string name = ImageHelper.CreateImageFromBytes("dog", Downdata); 
 
  //第三种 
  //byte[] Downdata = helper.DownloadAsBytesByName("QQQ"); 
  //Image img = ImageHelper.BytesToImage(Downdata); 
  //string path = Path.GetFullPath(@"../../DownLoadImg/") + DateTime.Now.ToString("yyyyMMddHHmmssfff") + ".jpg"; 
  ////使用path获取当前应用程序集的执行目录的上级的上级目录 
  //img.Save(path, System.Drawing.Imaging.ImageFormat.Jpeg); 
 
  #endregion 
 
  #region 查找图片 
  GridFSFileInfo gridFsFileInfo = helper.FindFiles("man"); 
  Console.WriteLine(gridFsFileInfo.Id); 
  #endregion 
 
  #region 删除图片 
  //helper.DroppGridFSBucket(); 
  #endregion 
 
  Console.ReadKey(); 
 } 
 }