public async Task <ObjectId> UploadFileAsync(Stream sourceStream, string fileName, GridFSUploadOptions uploadOptions = null)
{
var gridFsBucket = new GridFSBucket(this.database);
GridFSUploadStream destinationStream = await gridFsBucket.OpenUploadStreamAsync(fileName, uploadOptions);
//一次缓冲区大小
long filesize = sourceStream.Length;
int maxlenth = 4096;
byte[] buffer = new byte[maxlenth];
while (filesize > 0)
{
if (filesize < maxlenth)
{
maxlenth = (int)filesize;
}
await sourceStream.ReadAsync(buffer, 0, maxlenth);
await destinationStream.WriteAsync(buffer, 0, maxlenth);
filesize -= maxlenth;
}
await destinationStream.CloseAsync();
return(destinationStream.Id);
}
public async Task UploadFileAsync(
IMongoDatabase database,
string filePath,
string fileName,
GridFSUploadOptions uploadOptions = null)
{
var gridFsBucket = new GridFSBucket(database);
using (FileStream sourceStream = File.Open(filePath, FileMode.Open))
{
using (
GridFSUploadStream destinationStream =
await gridFsBucket.OpenUploadStreamAsync(fileName, uploadOptions))
{
await sourceStream.CopyToAsync(destinationStream);
await destinationStream.CloseAsync();
}
}
}
public MongoWriteContentProvider(GridFSBucket bucket, string label)
{
this.stream = bucket.OpenUploadStream(label);
}