TransferManager.CopyDirectoryAsync不替换文件 [英] TransferManager.CopyDirectoryAsync is not replacing the files

问题描述

您好团队，

在我们的一个项目中，每次需要将文件复制到输出Blob时，我们都有要求，如果文件已经存在，则需要替换文件

我写了流畅的代码.

    var Container = _blobClient.GetContainerReference(ContainerName);
                CloudBlobDirectory源= Container.GetDirectoryReference(源);
                CloudBlobDirectory dest = Container.GetDirectoryReference(Target);

等待TransferManager.CopyDirectoryAsync(source，dest，true，新的CopyDirectoryOptions {递归= true}，新的DirectoryTransferContext());

如果文件不是 在存储区中，但是存储区中已经存在文件，不会替换文件.请在这里提供帮助.

我们正在出于上述目的使用Microsoft.WindowsAzure.Storage.DataMovement库.

也请提出对上述代码的任何改进.

解决方案

下面的代码将比较源代码和目的地，并决定是否应覆盖.看看是否有帮助.

上下文.ShouldOverwriteCallback=(源，目标)=>
{
    var sourceFile = new FileInfo((string)source);
    var destBlob =目标为CloudBlob；
    返回sourceFile.LastWriteTimeUtc> destBlob.Properties.LastModified;
};

参考: https://stackoverflow.com/questions/41043925/azure-uploaddirectoryasync-doesnt-overwrite-existing-files-if-changed

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Hi  Team,

In One of our project we have requirment every time we need to copy the files to output blobs,if files are already present then we need replace the  files

I wrote the flowing code. 

   var Container = _blobClient.GetContainerReference(ContainerName);
                CloudBlobDirectory source = Container.GetDirectoryReference(Source);
                CloudBlobDirectory dest = Container.GetDirectoryReference(Target);

await TransferManager.CopyDirectoryAsync(source, dest, true, new CopyDirectoryOptions { Recursive = true }, new DirectoryTransferContext());

This is works fine if files are not  there in the storage ,but files already present in storage ,Its not replacing the files.Could you please help here.

we are using  Microsoft.WindowsAzure.Storage.DataMovement library for above purpose.

And also please suggest any improvement in above code.

解决方案

Code below will compare source and destination and decide if should overwrite or not. See if it helps.

context.ShouldOverwriteCallback = (source, destination) =>
{
    var sourceFile = new FileInfo((string)source);
    var destBlob = destination as CloudBlob;
    return sourceFile.LastWriteTimeUtc > destBlob.Properties.LastModified;
};

Refer: https://stackoverflow.com/questions/41043925/azure-uploaddirectoryasync-doesnt-overwrite-existing-files-if-changed

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