Dropbox API 使用Dropbox .NET库上传文件
示例
本示例使用Dropbox.NET库将文件上传到Dropbox帐户，并使用较大文件的上传会话：
private async Task Upload(string localPath, string remotePath)
{
const int ChunkSize = 4096 * 1024;
using (var fileStream = File.Open(localPath, FileMode.Open))
{
if (fileStream.Length <= ChunkSize)
{
await this.client.Files.UploadAsync(remotePath, body: fileStream);
}
else
{
await this.ChunkUpload(remotePath, fileStream, (int)ChunkSize);
}
}
}
private async Task ChunkUpload(String path, FileStream stream, int chunkSize)
{
ulong numChunks = (ulong)Math.Ceiling((double)stream.Length / chunkSize);
byte[] buffer = new byte[chunkSize];
string sessionId = null;
for (ulong idx = 0; idx < numChunks; idx++)
{
var byteRead = stream.Read(buffer, 0, chunkSize);
using (var memStream = new MemoryStream(buffer, 0, byteRead))
{
if (idx == 0)
{
var result = await this.client.Files.UploadSessionStartAsync(false, memStream);
sessionId = result.SessionId;
}
else
{
var cursor = new UploadSessionCursor(sessionId, (ulong)chunkSize * idx);
if (idx == numChunks - 1)
{
FileMetadata fileMetadata = await this.client.Files.UploadSessionFinishAsync(cursor, new CommitInfo(path), memStream);
Console.WriteLine(fileMetadata.PathDisplay);
}
else
{
await this.client.Files.UploadSessionAppendV2Async(cursor, false, memStream);
}
}
}
}
}