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Posted on by tdgscorpion

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Hello, I am trying to create a helper class in x++ that will upload files to Azure blob storage.

First I used Microsoft.WindowsAzure.Storage dll and it worked fine. But then I found that this package has been deprecated https://www.nuget.org/packages/microsoft.azure.storage.blob/ so I tried to rewrite the code using the recomended package Azure.Storage.Blobs.

Both Microsoft.WindowsAzure.Storage and Azure.Storage.Blobs are included in AosService\PackagesLocalDirectory\bin so we can reference them diractly in x++ code.

The problem is that containerClient.CreateIfNotExists() from Azure.Storage.Blobs does not compile and throwing bunch of errors

Azure.Storage.Blobs Code (throws errors on the first lines):

public static void uploadBlob(System.IO.MemoryStream file, str fileName, str connectionString, str containerName, int expireMinutes = 5)
{
// Create a BlobServiceClient using the connection string
Azure.Storage.Blobs.BlobServiceClient blobServiceClient = new Azure.Storage.Blobs.BlobServiceClient(connectionString);

// Get a reference to the container
Azure.Storage.Blobs.BlobContainerClient containerClient = blobServiceClient.GetBlobContainerClient("ponta");

// Create the container if it doesn't exist
containerClient.CreateIfNotExists();

...

}

Errors:
Severity   Code   Description   Project   File   Line   Suppression State
Error       The "BuildTask" task returned false but did not log an error.   ExportInvoice (ISV) [ISAIS]   C:\Program Files (x86)\MSBuild\Microsoft\Dynamics\AX\Microsoft.Dynamics.Framework.Tools.BuildTasks.17.0.targets   63
Error       Cannot convert the default value of the 'IDictionary`2' parameter of method 'CreateIfNotExists' on CLR type 'Azure.Storage.Blobs.BlobContainerClient' because it cannot be converted to a valid X++ literal. Pass a literal value for 'IDictionary`2' instead.   ExportInvoice (ISV) [ISAIS]   K:\AosService\PackagesLocalDirectory\bin\XppSource\ISAIS\AxClass_ISAIS_AzureStorageAccountHelper.xpp   17
Error       Cannot convert the default value of the 'CancellationToken' parameter of method 'CreateIfNotExists' on CLR type 'Azure.Storage.Blobs.BlobContainerClient' because it cannot be converted to a valid X++ literal. Pass a literal value for 'CancellationToken' instead.   ExportInvoice (ISV) [ISAIS]   K:\AosService\PackagesLocalDirectory\bin\XppSource\ISAIS\AxClass_ISAIS_AzureStorageAccountHelper.xpp   17
Error       Cannot convert the default value of the 'BlobContainerEncryptionScopeOptions' parameter of method 'CreateIfNotExists' on CLR type 'Azure.Storage.Blobs.BlobContainerClient' because it cannot be converted to a valid X++ literal. Pass a literal value for 'BlobContainerEncryptionScopeOptions' instead.   ExportInvoice (ISV) [ISAIS]   K:\AosService\PackagesLocalDirectory\bin\XppSource\ISAIS\AxClass_ISAIS_AzureStorageAccountHelper.xpp   17

I now started to wonder is worth it to write this kind of logic in x++ or just write it in .net and reference it in x++.
What do you think, what are Pros and Cons?

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Martin Dráb 237,965 Most Valuable Professional on at

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Regarding "Cannot convert the default value of the 'CancellationToken' parameter of method 'CreateIfNotExists' on CLR type 'Azure.Storage.Blobs.BlobContainerClient' because it cannot be converted to a valid X++ literal. Pass a literal value for 'CancellationToken' instead.", the message already contains a suggested solution. Have you tried it?

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Anton Venter 20,346 Super User 2025 Season 2 on at

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Looking at the stack trace, there is a clue there. Have you tried to pass the default value instead of leaving it empty?

"...Pass a literal value for 'BlobContainerEncryptionScopeOptions' instead...."

As far as the pros and cons go, with these kiund of things, I always to try to do as much as possible in X++. This reduces dependencies.

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tdgscorpion 107 on at

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I already tried create these objects

Azure.Storage.Blobs.Models.PublicAccessType publicAccessType = Azure.Storage.Blobs.Models.PublicAccessType::None;

and

Azure.Storage.Blobs.Models.BlobContainerEncryptionScopeOptions encryptionScopeOptions = null;

are fine but could not create

System.Collections.Generic.IDictionary`2 metadata

and

System.Threading.CancellationToken cancellationToken

these types throw errors
System.Collections.Generic.IDictionary`2 is sintactical, I don`t know what is this `2
and CancellationToken is not found in System.Threading

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CU07020437-0 2 on at

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Hello, where you able to fix this error? Please let me know if you did.

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Martin Dráb 237,965 Most Valuable Professional on at

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System.Collections.Generic.IDictionary`2 is a generic collection; you can't write it like that. X++ doesn't support generics, therefore if you want to do things like declare generic types, you'll be better off writing a C# library (and calling this library from X++) then trying to do it directly in X++. There is a good chance that it'll solve the original problem as well; just make sure that your C# library uses the same assembly versions as F&O.

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Gerhard Rieser 6 on at

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Hello,
for me following code works:

BlobContainerClient blobContainer = blobServiceClient.GetBlobContainerClient(_blobContainerName);

Azure.Storage.Blobs.Models.PublicAccessType publicAccessType = Azure.Storage.Blobs.Models.PublicAccessType::None;
Azure.Storage.Blobs.Models.BlobContainerEncryptionScopeOptions encryptionScopeOptions = null;
System.Threading.CancellationToken cancelationToken = new System.Threading.CancellationToken();
blobContainer.CreateIfNotExists(publicAccessType, null,encryptionScopeOptions,cancelationToken);

It creates the blob if it does not exist.

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WV-08081158-0 7 on at

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Hi, were you able to solve this?

I do have exact same problem, the compiler fails on the character between Dictionary and 2 when declaring from X++.

IDictionary`2

I did try:

System.Collections.Generic.IDictionary`2<System.String, System.String> metadata =
new System.Collections.Generic.IDictionary`2<System.String, System.String>();

var metadata = new System.Collections.Generic.IDictionary`2<System.String, System.String>();

Both times it fails on the ` character before the 2.

I'll also try the solution by Gerhard, just passing null for the IDictionary`2 , compiler seems to like that.

That does indeed work, thanks Gerhard. Also when using AFS instead of Blob.

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tdgscorpion 107 on at

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Tnak you all for the responses. I wrote all the logic in C# library and used it in X++

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Martin Dráb 237,965 Most Valuable Professional on at

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@WV-08081158-0 Please create a new thread for your question, because this one was about a problem CreateIfNotExists(). In short, your code indeed isn't valid X++ and will never compile. You should either avoid generic types in X++ (typically by doing so in a C# library), you'll need to instantiate the object via reflection or you can try the limited (and not really supported) capability for generic types in X++ using the C# syntax (<>).

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WV-08081158-0 7 on at

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Hi @Martin Dráb,

as I did explain in my post. I was able to solve it the same way as Gerhard. So no question and no new thread ;-).

Following code does work:

ShareFileClient fileClient = new Azure.Storage.Files.Shares.ShareFileClient(connectionString, afsFileShareName, filePathAndName);

ShareFileHttpHeaders httpHeaders = new Azure.Storage.Files.Shares.Models.ShareFileHttpHeaders();
FileSmbProperties fileSmbProperties = new Azure.Storage.Files.Shares.Models.FileSmbProperties();
System.String filePermission = '';
ShareFileRequestConditions shareFileRequestConditions = new Azure.Storage.Files.Shares.Models.ShareFileRequestConditions();
System.Threading.CancellationToken cancellationToken = new System.Threading.CancellationToken();

fileClient.Create(_stream.Length, httpHeaders, null, fileSmbProperties, filePermission, shareFileRequestConditions, cancellationToken);

ShareFileUploadOptions shareFileUploadOptions = new Azure.Storage.Files.Shares.Models.ShareFileUploadOptions();
fileClient.Upload(_stream, shareFileUploadOptions, cancellationToken);

grtz

Wim

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