Check for bucket existence with C# SDK V2 - Object Storage Service

Use IsBucketExistAsync to check whether a bucket exists. The method returns true if the bucket exists, or false if it does not exist.

Prerequisites

Before you begin, make sure you have:

The oss:GetBucketAcl permission on the target bucket. For details, see Grant custom permissions to a RAM user
Your AccessKey ID and AccessKey Secret stored in environment variables OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET

Sample code

The following example uses the China (Hangzhou) region (cn-hangzhou) and a public endpoint. To access OSS from other Alibaba Cloud services in the same region, replace the endpoint with an internal endpoint. For region-to-endpoint mappings, see OSS regions and endpoints.

using OSS = AlibabaCloud.OSS.V2;

var region = "cn-hangzhou";
var bucket = "your bucket name";
var endpoint = null as string; // Optional. For example: https://oss-cn-hangzhou.aliyuncs.com

var cfg = OSS.Configuration.LoadDefault();
cfg.CredentialsProvider = new OSS.Credentials.EnvironmentVariableCredentialsProvider();
cfg.Region = region;
if (endpoint != null)
{
    cfg.Endpoint = endpoint;
}

using var client = new OSS.Client(cfg);

var result = await client.IsBucketExistAsync(bucket);

Console.WriteLine("IsBucketExist done");
Console.WriteLine($"result: {result}");

References

For the complete sample code, see is_bucket_exist.cs.