public Stream GetImageContent(string id)
{
if (string.IsNullOrEmpty(id))
{
return(null);
}
var objId = new ObjectId();
if (!ObjectId.TryParse(id, out objId))
{
return(null);
}
var image = Get(id);
if (string.IsNullOrEmpty(image.ContentId))
{
return(null);
}
var content = new MemoryStream();
GridFs.DownloadToStream(ObjectId.Parse(image.ContentId), content);
content.Position = 0;
return(content);
}
public async Task <IEnumerable <GridFSFileInfo> > GetImages(IEnumerable <String> ImagesId)
{
var imagesList = new List <GridFSFileInfo>();
foreach (var item in ImagesId)
{
imagesList.AddRange(await GridFs.Find(Builders <GridFSFileInfo> .
Filter.Eq(x => x.Metadata["FileID"], item)).ToListAsync());
}
return(imagesList);
}
public async Task UploadBytes(Byte[] source, String fileName)
{
_imageId = ObjectId.GenerateNewId().ToString();
await GridFs.UploadFromBytesAsync(fileName, source,
new GridFSUploadOptions
{
Metadata = new BsonDocument
{
{ "FileID", ImageId }
}
});
}
public async Task UploadStream(Stream stream, String fileName)
{
_imageId = ObjectId.GenerateNewId().ToString();
await GridFs.UploadFromStreamAsync(fileName, stream,
new GridFSUploadOptions
{
Metadata = new BsonDocument
{
{ "FileID", ImageId }
}
});
}
public Stream GetByContentId(string id)
{
var objId = new ObjectId();
if (!ObjectId.TryParse(id, out objId))
{
return(null);
}
var content = new MemoryStream();
GridFs.DownloadToStream(ObjectId.Parse(id), content);
content.Position = 0;
return(content);
}
public void Delete(string id)
{
var image = Get(id);
if (image != null)
{
if (image.ContentId != null)
{
GridFs.Delete(ObjectId.Parse(image.ContentId));
}
File.Delete(image.Filename);
GridFs.Delete(ObjectId.Parse(image.Thumb.ContentId));
var builder = Builders <Image> .Filter;
var filter = builder.Eq("_id", ObjectId.Parse(id));
Collection.DeleteOne(filter);
}
}
public async Task Delete(ObjectId fileId)
{
var fileIdFilter = Builders <BsonDocument> .Filter.Eq("files_id", fileId);
await Task.WhenAll(GridFs.DeleteAsync(fileId), ChunksCollection.DeleteManyAsync(fileIdFilter));
}
public async Task <string> Get(ObjectId fileId)
{
var file = await GridFs.DownloadAsBytesAsync(fileId);
return(Encoding.UTF8.GetString(file));
}
public async Task <ObjectId> Create(Guid id, Stream stream) =>
await GridFs.UploadFromStreamAsync($"{id}.txt", stream);
public async Task <ObjectId> Create(Guid id, string data) =>
await GridFs.UploadFromBytesAsync($"{id}.txt",
Encoding.UTF8.GetBytes(data));
public string CreateThumb(string filename, Stream thumbContent)
{
thumbContent.Position = 0;
return(GridFs.UploadFromStream(filename, thumbContent).ToString());
}
