Upload a string
For the complete code of uploading a string, see GitHub.You can run the following code to upload a string:
using System.Text;
using Aliyun.OSS;
var endpoint = "<yourEndpoint>";
var accessKeyId = "<yourAccessKeyId>";
var accessKeySecret = "<yourAccessKeySecret>";
var bucketName = "<yourBucketName>";
var objectName = "<yourObjectName>";
var objectContent = "More than just cloud." ;
// Create an OSSClient instance.
var client = new OssClient(endpoint, accessKeyId, accessKeySecret);
try
{
byte[] binaryData = Encoding.ASCII.GetBytes(objectContent);
MemoryStream requestContent = new MemoryStream(binaryData);
// Upload a file.
client.PutObject(bucketName, objectName, requestContent);
Console.WriteLine("Put object succeeded");
}
catch (Exception ex)
{
Console.WriteLine("Put object failed, {0}", ex.Message);
}
Upload a specified local file
For the complete code of uploading a specified local file, see Git Hub.
You can run the following code to upload a specified local file:
using Aliyun.OSS;
var endpoint = "<yourEndpoint>";
var accessKeyId = "<yourAccessKeyId>";
var accessKeySecret = "<yourAccessKeySecret>";
var bucketName = "<yourBucketName>";
var objectName = "<yourObjectName>";
var localFilename = "<yourLocalFilename>";
// Create an OSSClient instance.
var client = new OssClient(endpoint, accessKeyId, accessKeySecret);
try
{
// Upload a local file.
client.PutObject(bucketName, objectName, localFilename);
Console.WriteLine("Put object succeeded");
}
catch (Exception ex)
{
Console.WriteLine("Put object failed, {0}", ex.Message);
}
Upload a file with MD5 verification
To ensure the consistency between the data sent by the SDK and the data received by the OSS client, you can add a Content-MD5 value in ObjectMeta. Then OSS checks the received data against the MD5 value.
For the complete code of uploading a file with MD5 verification, see GitHub.
using Aliyun.OSS;
using Aliyun.OSS.Util;
var endpoint = "<yourEndpoint>";
var accessKeyId = "<yourAccessKeyId>";
var accessKeySecret = "<yourAccessKeySecret>";
var bucketName = "<yourBucketName>";
var objectName = "<yourObjectName>";
var localFilename = "<yourLocalFilename>";
// Create an OSSClient instance.
var client = new OssClient(endpoint, accessKeyId, accessKeySecret);
try
{
// Calculate the MD5 value.
string md5;
using (var fs = File.Open(localFilename, FileMode.Open))
{
md5 = OssUtils.ComputeContentMd5(fs, fs.Length);
}
var objectMeta = new ObjectMetadata
{
ContentMd5 = md5
};
// Upload a file.
client.PutObject(bucketName, objectName, localFilename, objectMeta);
Console.WriteLine("Put object succeeded");
}
catch (Exception ex)
{
Console.WriteLine("Put object failed, {0}", ex.Message);
}
Note MD5 verification may cause a reduction in performance.
Asynchronous upload
For the complete code of asynchronous upload, see GitHub.
You can run the following code to perform asynchronous upload:
using System;
using System.IO;
using System.Threading;
using Aliyun.OSS;
using Aliyun.OSS.Common;
// Upload a file asynchronously.
namespace AsyncPutObject
{
class Program
{
static string endpoint = "<yourEndpoint>";
static string accessKeyId = "<yourAccessKeyId>";
static string accessKeySecret = "<yourAccessKeySecret>";
static string bucketName = "<yourBucketName>";
static string objectName = "<yourObjectName>";
static string localFilename = "<yourLocalFilename>";
static AutoResetEvent _event = new AutoResetEvent(false);
// Create an OSSClient instance.
static OssClient client = new OssClient(endpoint, accessKeyId, accessKeySecret);
private static void PutObjectCallback(IAsyncResult ar)
{
try
{
client.EndPutObject(ar);
Console.WriteLine(ar.AsyncState as string);
Console.WriteLine("Put object succeeded");
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
finally
{
_event.Set();
}
}
public static void AsyncPutObject()
{
try
{
using (var fs = File.Open(localFilename, FileMode.Open))
{
var metadata = new ObjectMetadata();
// Add custom meta information.
metadata.UserMetadata.Add("mykey1", "myval1");
metadata.UserMetadata.Add("mykey2", "myval2");
metadata.CacheControl = "No-Cache";
metadata.ContentType = "text/html";
string result = "Notice user: put object finish";
// Upload a file asynchronously.
client.BeginPutObject(bucketName, objectName, fs, metadata, PutObjectCallback, result.ToCharArray());
_event.WaitOne();
}
}
catch (OssException ex)
{
Console.WriteLine("Failed with error code: {0}; Error info: {1}. \nRequestID:{2}\tHostID:{3}",
ex.ErrorCode, ex.Message, ex.RequestId, ex.HostId);
}
catch (Exception ex)
{
Console.WriteLine("Failed with error info: {0}", ex.Message);
}
}
static void Main(string[] args)
{
Program.AsyncPutObject();
}
}
}
Note When using asynchronous upload, you must implement your own callback handler.