我们如何跟踪azure文件存储文件夹是否已更新? [英] How do we track azure file storage folder is updated or not?

问题描述

我有azure文件存储，其中包含其他文件夹. 我想检查或跟踪该文件夹的最新更新时间?

I have azure file storage with other folders inside it. I want to check or track when that folder is last updated ?

我已经完成了一个简单的控制台应用程序，可以从该位置获取所有文件-

I have done a simple console application to get all files from that location -

        // Get list of all files/directories on the file share 
        CloudStorageAccount cloudStorageAccount = CloudStorageAccount.Parse(ConfigurationManager.AppSettings["storageConnectionString"]);
        CloudFileClient fileClient = cloudStorageAccount.CreateCloudFileClient();
        CloudFileShare fileShare = fileClient.GetShareReference(ConfigurationManager.AppSettings["shareName"]);

        var sourceName = fileShare.GetRootDirectoryReference().GetDirectoryReference((ConfigurationManager.AppSettings["sourceName"]));
        IEnumerable<IListFileItem> fileList = sourceName.ListFilesAndDirectories();

        CloudFileDirectory destinationDir = fileShare.GetRootDirectoryReference().GetDirectoryReference((ConfigurationManager.AppSettings["destinationName"]));

        foreach (IListFileItem listItem in fileList)
        {
         // gives me all file records 
        }

我试图这样得到它，但它是null. var test = sourceName.Properties.LastModified;

I tried to get it like this but it is null. var test = sourceName.Properties.LastModified;

由于为空，我无法使用此查询:(

because of null i can not able to use this query :(

 var latest= fileShare.GetRootDirectoryReference().ListFilesAndDirectories()
    .OfType<CloudFileShare>()
    .OrderByDescending(m => m.Properties.LastModified)
    .ToList()
    .First();

我刚刚注意到，我刚刚将一个新文件上传到该文件夹​​中，但是LastModified仍然是旧日期，这意味着LastModified与该文件夹和文件是分开的:现在该怎么办?

i just noticed that , i have uploaded one new file just now into that folder but still LastModified is old date , it means LastModified is separate for that folder and file :O what to do now ?

我想检查是否在24小时内将任何新文件更新到主文件夹的子文件夹中.

I want to check whether any new file is updated into any sub-fodler of main folder or not within 24hr.

我想知道如何检查该源文件夹中的最新更新文件日期时间吗?

I wonder how to I check the last updated file datetime from that source folder ?

为什么LastModified为null?

why LastModified is null ?

推荐答案

要检索属性值，调用Blob或容器上的FetchAttributesAsync方法以填充属性，然后读取值.

To retrieve property values, call the FetchAttributesAsync method on your blob or container to populate the properties, then read the values.

运行控制台应用程序时，它实际上会创建一个CloudFileShare对象的新实例，并且其属性将初始化为默认值.您需要对此调用FetchAttributes方法以填充属性.

When you run your console app, it essentially creates a new instance of CloudFileShare object and its properties are initialized to the default value. You would need to call FetchAttributes method on this to fill the properties.

此外，当您列出文件的属性时，也会提取文件的属性，因此您无需创建CloudFileShare的新实例.您可以参考此线程.

Also, when you list the file's the properties of the file are fetched as well, you will not need to create a new instance of CloudFileShare. You could refer to this thread.

您可以在获取属性之前使用 sourceName.FetchAttributes(); .我对其进行了测试，并且效果很好.请参考以下代码:

You could use sourceName.FetchAttributes(); before retrieve property. I test it and it works fine. Please refer to the code as below:

CloudStorageAccount cloudStorageAccount = CloudStorageAccount.Parse(ConfigurationManager.AppSettings["storageConnectionString"]);
CloudFileClient fileClient = cloudStorageAccount.CreateCloudFileClient();
CloudFileShare fileShare = fileClient.GetShareReference(ConfigurationManager.AppSettings["shareName"]);
var sourceName = fileShare.GetRootDirectoryReference().GetDirectoryReference((ConfigurationManager.AppSettings["sourceName"]));
sourceName.FetchAttributes();
var test = sourceName.Properties.LastModified;

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