# 查看事件通知
![](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。
您可以通过ObsClient.GetBucketNotification查看桶的事件通知。以下代码展示了如何查看桶的事件通知：
```
// 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);
// 查看事件通知
try
{
    GetBucketNotificationRequest request = new GetBucketNotificationRequest
    {
        BucketName = "bucketname",
    };
    GetBucketNotificationReponse response = client.GetBucketNotification(request);
    if (response.Configuration.FunctionGraphConfigurations.Count > 0)
    {
        foreach (FunctionGraphConfiguration functionGraphConfig in response.Configuration.FunctionGraphConfigurations)
        {
            Console.WriteLine("ID is : {0}", functionGraphConfig.Id);
            foreach (EventTypeEnum e in functionGraphConfig.Events)
            {
                Console.WriteLine("Event is : {0}", e);
            }
            foreach (FilterRule filterRule in functionGraphConfig.FilterRules)
            {
                Console.WriteLine("Name is : {0}", filterRule.Name);
                Console.WriteLine("Value is : {0}", filterRule.Value);
            }
        }
    }
    if (response.Configuration.TopicConfigurations.Count > 0)
    {
        foreach (TopicConfiguration topicConfig in response.Configuration.TopicConfigurations)
        {
            Console.WriteLine("ID is : {0}", topicConfig.Id);
            Console.WriteLine("TopicConfiguration is : {0}", topicConfig.Topic);
            foreach (EventTypeEnum e in topicConfig.Events)
            {
                Console.WriteLine("Event is : {0}", e);
            }
            foreach (FilterRule filterRule in topicConfig.FilterRules)
            {
                Console.WriteLine("Name is : {0}", filterRule.Name);
                Console.WriteLine("Value is : {0}", filterRule.Value);
            }
        }
    }
}
catch (ObsException ex)
{
    Console.WriteLine("ErrorCode: {0}", ex.ErrorCode);
    Console.WriteLine("ErrorMessage: {0}", ex.ErrorMessage);
}
```