何时以天蓝色创建块状Blob? [英] When was a block blob created in azure?

问题描述

Blob引用包含一个Properties属性，该属性的LastModified为DateTimeOffset?.但是，我找不到Blob的创建日期(时间).有没有我可以使用的标准API，或者我需要将其存储在meta中?

The blob reference contains a Properties property that has a LastModified of DateTimeOffset?. However, I can't find when was the creation date(time) of the blob. Is there a standard API I can use or I need to store that in the meta?

    public async Task<IBlobMeta> GetBlobMetaAsync(string blobId)
        {
            if (IsNullOrWhiteSpace(blobId))
                throw new ArgumentException("Value cannot be null or whitespace.", nameof(blobId));

            var blob = await EnsureGetBlobById(blobId);
            await blob.FetchAttributesAsync();

            string clientBlobName;
            blob.Metadata.TryGetValue(BlobNameMetaKey, out clientBlobName);

            var length = blob.Properties.Length;
            var md5 = blob.Properties.ContentMD5;
            var lastModified = blob.Properties.LastModified.Value.ToUniversalTime().DateTime;
            var dateCreated= blob.Properties.???????;
            return new AzureBlobMeta(blobId, clientBlobName, length, md5, dateCreated);
  }

推荐答案

Created date属性已从

The Created date property has been added in Storage Client Library, starting with version 9.2.0:

Blobs:添加了对Blob创建时间属性的支持.

Blobs: Added support for blob creation time property.

(自18年5月23日起在 Nuget 上提供)

(Available on Nuget since May 23 '18)

这是在 BlobProperties.cs :

/// <summary>
/// Gets the the creation time for the blob, expressed as a UTC value.
/// </summary>
/// <value>A <see cref="DateTimeOffset"/> containing the blob's creation time, in UTC format.</value>
public DateTimeOffset? Created { get; internal set; }

该类型是可空的DateTimeOffset，与LastModified属性相同.

The type is nullable DateTimeOffset, same as LastModified property.

值的来源来自REST API中的x-ms-creation-time标头，该标头添加在

The source of the value comes from x-ms-creation-time header in the REST API, which was added in version 2017-11-09:

x-ms-creation-time 2017-11-09版及更高版本.创建Blob的日期/时间.日期格式遵循RFC 1123.

x-ms-creation-time Version 2017-11-09 and newer. The date/time at which the blob was created. The date format follows RFC 1123.

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