首先從阿裡雲官網下載下傳OSS的.NET SDK,然後在項目中添加引用Aliyun.OSS.dll
本例為分片上傳方式,适用于上傳比較大的檔案。
引入命名空間:
using Aliyun.OSS;
using Aliyun.OSS.Common;
定義阿裡雲OSS接口參數:
private string AccessKeyId = "xxx"; //阿裡雲AccessKeyId
private string AccessKeySecret = "xxx"; //阿裡雲AccessKeySecret
private string OssEndpoint = "http://oss-cn-xxx.aliyuncs.com"; //阿裡雲Endpoint
private string OssBucket = "xxx"; //阿裡雲Bucket
private static OssClient aliyunclient; //阿裡雲OSS連接配接對象
static int partSize = 50 * 1024 * 1024; //分片上傳大小
建立阿裡雲OSS用戶端連接配接:
aliyunclient = new OssClient(this.OssEndpoint, this.AccessKeyId, this.AccessKeySecret);
分片上傳檔案:
string remotefile = "path/to/aliyun/test.mp4"; //阿裡雲上目标檔案
string localfile = "D:\\test.mp4"; //要上傳的本地檔案
try
{
var uploadId = InitiateMultipartUpload(this.OssBucket, remotefile);
var partETags = UploadParts(this.OssBucket, remotefile, localfile, uploadId, partSize);
CompleteUploadPart(this.OssBucket, remotefile, uploadId, partETags);
bool doesexist = aliyunclient.DoesObjectExist(this.OssBucket, remotefile);
if (doesexist)
{
this.logtext = "上傳成功。";
}
else
{
this.logtext = "上傳失敗。";
}
}
catch (OssException ex)
{
this.logtext = "上傳失敗," + ex.Message + "。";
}
分片上傳函數定義:
private static string InitiateMultipartUpload(String bucketName, String objectName)
{
var request = new InitiateMultipartUploadRequest(bucketName, objectName);
var result = aliyunclient.InitiateMultipartUpload(request);
return result.UploadId;
}
private static List<PartETag> UploadParts(String bucketName, String objectName, String fileToUpload, String uploadId, int partSize)
{
var fi = new FileInfo(fileToUpload);
var fileSize = fi.Length;
var partCount = fileSize / partSize;
if (fileSize % partSize != 0)
{
partCount++;
}
var partETags = new List<PartETag>();
using (var fs = File.Open(fileToUpload, FileMode.Open))
{
for (var i = 0; i < partCount; i++)
{
var skipBytes = (long)partSize * i;
fs.Seek(skipBytes, 0);
var size = (partSize < fileSize - skipBytes) ? partSize : (fileSize - skipBytes);
var request = new UploadPartRequest(bucketName, objectName, uploadId)
{
InputStream = fs,
PartSize = size,
PartNumber = i + 1
};
var result = aliyunclient.UploadPart(request);
partETags.Add(result.PartETag);
}
}
return partETags;
}
private static CompleteMultipartUploadResult CompleteUploadPart(String bucketName, String objectName, String uploadId, List<PartETag> partETags)
{
var completeMultipartUploadRequest =
new CompleteMultipartUploadRequest(bucketName, objectName, uploadId);
foreach (var partETag in partETags)
{
completeMultipartUploadRequest.PartETags.Add(partETag);
}
return aliyunclient.CompleteMultipartUpload(completeMultipartUploadRequest);
}