# 多版本对象权限
![](https://support.huaweicloud.com/sdk-dotnet-devg-obs/public_sys-resources/notice_3.0-zh-cn.png)
开发过程中，您有任何问题可以在github上[提交issue](https://github.com/huaweicloud/huaweicloud-sdk-dotnet-obs/issues)，或者在[华为云对象存储服务论坛](https://bbs.huaweicloud.com/forum/forum-620-1.html)中发帖求助。[接口参考文档](https://obssdk.obs.cn-north-1.myhuaweicloud.com/apidoc/cn/dotnet/html/G_OBS.htm)详细介绍了每个接口的参数和使用方法。
#### 设置多版本对象ACL
您可以通过ObsClient.SetObjectAcl接口传入版本号（VersionId）设置多版本对象ACL，示例代码如下：
```
// 初始化配置参数
ObsConfig config = new ObsConfig();
config.Endpoint = "https://your-endpoint";
// 认证用的ak和sk硬编码到代码中或者明文存储都有很大的安全风险，建议在配置文件或者环境变量中密文存放，使用时解密，确保安全；本示例以ak和sk保存在环境变量中为例，运行本示例前请先在本地环境中设置环境变量AccessKeyID和SecretAccessKey。
// 您可以登录访问管理控制台获取访问密钥AK/SK，获取方式请参见https://support.huaweicloud.com/usermanual-ca/ca_01_0003.html
string accessKey= Environment.GetEnvironmentVariable("AccessKeyID", EnvironmentVariableTarget.Machine);
string secretKey= Environment.GetEnvironmentVariable("SecretAccessKey", EnvironmentVariableTarget.Machine);
// 创建ObsClient实例
ObsClient client = new ObsClient(accessKey, secretKey, config);
// 设置多版本对象ACL
try
{
    SetObjectAclRequest request = new SetObjectAclRequest();
    request.BucketName = "bucketname";
    request.ObjectKey = "objectname";
    request.VersionId = "versionId";
    request.AccessControlList = new AccessControlList();
    Owner owner = new Owner();
    owner.Id = "ownerid";
    request.AccessControlList.Owner = owner;
    Grant item = new Grant();
    item.Permission = PermissionEnum.FullControl;
    item.Grantee = new GroupGrantee(GroupGranteeEnum.AllUsers);
    request.AccessControlList.Grants.Add(item);
    SetObjectAclResponse response = client.SetObjectAcl(request);
    Console.WriteLine("Set object acl response: {0}", response.StatusCode);
}
catch (ObsException ex)
{
    Console.WriteLine("ErrorCode: {0}", ex.ErrorCode);
    Console.WriteLine("ErrorMessage: {0}", ex.ErrorMessage);
}
```
![](https://support.huaweicloud.com/sdk-dotnet-devg-obs/public_sys-resources/note_3.0-zh-cn.png)
ACL中需要填写的所有者（Owner）或者被授权用户（Grantee）的ID，是指用户的账号ID，可通过OBS控制台"我的凭证"页面查看。
#### 获取多版本对象ACL
您可以通过ObsClient.GetObjectAcl接口传入版本号（VersionId）获取多版本对象ACL，示例代码如下：
```
// 初始化配置参数
ObsConfig config = new ObsConfig();
config.Endpoint = "https://your-endpoint";
// 认证用的ak和sk硬编码到代码中或者明文存储都有很大的安全风险，建议在配置文件或者环境变量中密文存放，使用时解密，确保安全；本示例以ak和sk保存在环境变量中为例，运行本示例前请先在本地环境中设置环境变量AccessKeyID和SecretAccessKey。
// 您可以登录访问管理控制台获取访问密钥AK/SK，获取方式请参见https://support.huaweicloud.com/usermanual-ca/ca_01_0003.html
string accessKey= Environment.GetEnvironmentVariable("AccessKeyID", EnvironmentVariableTarget.Machine);
string secretKey= Environment.GetEnvironmentVariable("SecretAccessKey", EnvironmentVariableTarget.Machine);
// 创建ObsClient实例
ObsClient client = new ObsClient(accessKey, secretKey, config);
// 获取多版本访问权限
try
{
    GetObjectAclRequest request = new GetObjectAclRequest();
    request.BucketName = "bucketname";
    request.ObjectKey = "objectname";
    request.VersionId = "versionId";
    GetObjectAclResponse response = client.GetObjectAcl(request);
    Console.WriteLine("GetObjectAcl grant account: {0}", response.AccessControlList.Grants.Count);
    Console.WriteLine("GetObjectAcl owner id: {0}", response.AccessControlList.Owner.Id);
    foreach (Grant grant in response.AccessControlList.Grants)
    {
        if(grant.Grantee is CanonicalGrantee)
        {
              Console.WriteLine("Grantee id: {0}", (grant.Grantee as CanonicalGrantee).Id);
        }else if(grant.Grantee is GroupGrantee)
        {
              Console.WriteLine("Grantee type: {0}", (grant.Grantee as GroupGrantee).GroupGranteeType);
        }
              Console.WriteLine("Grant permission: {0}", grant.Permission);
        }
    }
}
catch (ObsException ex)
{
    Console.WriteLine("ErrorCode: {0}", ex.ErrorCode);
    Console.WriteLine("ErrorMessage: {0}", ex.ErrorMessage);
}
```