How to create ShareFileClient without specifying it's size to be able to stream data to it?

Question

I would like to create new blob on FileShareClient in Azure FileShare resource with .NET api. I cannot specify it's size in the beginning (because it will be filled with data later eg. csv file filled with lines, up to couple of GBs).

I was trying to use something like this in my code:

using Azure.Storage.Files.Shares

  ShareFileClient fileShare = new ShareFileClient(
            "MYConnectionString",
            "FileShareName",
            "TestDirectoryName");
  if (!fileShare.Exists())
        {
            fileShare.Create(0);
        }
var stream = fileShare.OpenWrite(true, 0);

[Edit] I have got an exception: System.ArgumentException: 'options.MaxSize must be set if overwrite is set to true' Is there any way to avoid specyfining this size?

Answer 1

Micro$ofts infinite wisdom: resize is hidden in SetHttpHeaders method.

public void AppendFile(string filePath, byte[] data)
{
    ShareFileClient fileShare = new ShareFileClient(connectionString, shareClient.Name, filePath);
    if (!fileShare.Exists())
        fileShare.Create(0);

    for (int i = 0; i < 10; i++)
    {
        var properties = fileShare.GetProperties();
        var openOptions = new ShareFileOpenWriteOptions();

        fileShare.SetHttpHeaders(properties.Value.ContentLength + data.Length);

        var stream = fileShare.OpenWrite(false, properties.Value.ContentLength, openOptions);

        stream.Write(data, 0, data.Length);

        stream.Flush();
    }
}
    

Answer 2

Please try to use the latest package Azure.Storage.Files.Shares, version 12.5.0.

Note, in the code new ShareFileClient(), the last parameter is the directory name + file name.

see the code below:

        ShareFileClient f2 = new ShareFileClient(connectionString, shareName, dirName + "/test.txt");
        if (!f2.Exists())
        {
            f2.Create(0);
        }

The file with 0 size can be created, here is the test result: