How to upload file in Azure Blob Storage using c# having file name with accent (à, è, ù) in it.

R Rakesh Kumar 0

I am trying to upload a fle with file name having some accent for example "Rapport Draft à relire".

The UploadAsync method of BloadClient class start giving error as the http request cannot have non ASCII characters . Here we can see the name of the file has non-ASCII character, in case we make it HttpUtility.HtmlEncode(fileName) , it will work fine but the blob name saved in the storage will also become the same, here for example it will become "Rapport Draft à relire" . Now if someone tries to use the method GetBlobClient with the blob name "Rapport Draft à relire" then it will not able to fetch it due to these special characters. Can you suggest what needs to be done in these scenario?

KarishmaTiwari-MSFT 20,207 Reputation points Microsoft Employee

2024-07-23T23:45:52.2466667+00:00

When working with file names that contain non-ASCII characters (like accents), and you want to upload them to Azure Blob Storage using C#, you need to ensure that these characters are properly encoded and handled to avoid issues during upload and retrieval.
Use URL encoding to ensure the file name is valid for HTTP requests. This will make the file name URL-safe. Save the original file name (with special characters) as metadata or in a database. This way, you can always retrieve the original name when needed. When you need to retrieve the blob, decode the encoded file name back to its original form. This ensures that the special characters are preserved.
R Rakesh Kumar 0 Reputation points

2024-07-24T04:48:45.3233333+00:00
Hi Karishma, thanks for replying. I think you have not solve it in real and only in theory, let me try to explain the real problem. I already have database where we are keeping the real name then where the issue is.

When you try to use URL encoding methods to make it safe what will happen even the ASCII characters like space, ? and all will get converted and saved in the Blob storage now when you try to retrieve it on the basis of name due to these special char so many times it will give you null as I am not aware how the blobclient query these special character .

When I use Blob Storage Explorer and try to upload similar file with name having any non-ascii characters then I am seeing the blob name is containing the name as it is with accent.Though I believe that is also happening through http call I believe, in the background the blob storage explorer is also calling the http to send this file to the storage, I am more interested in knowing how that is taken care.

I will start working on this problem again next week, in case I will resolve It in optimum way, I will let you know.

I was expecting microsoft to provide something for these scenario as it is quite common to store blob with names having accent (most of the Europe has these kind of file names).

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How to upload file in Azure Blob Storage using c# having file name with accent (à, è, ù) in it.

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