TempFile 1.0.2

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TempFile

A Library that helps the User to deal with short-lived Streams that are too large to just keep in memory. An Example of such a usecase could be: Your logic needs to download a file, perform some operations on it and upload it somewhere else.

'TempFile' helps by providing a Stream to a Temp-File that you wan write to/read from and gets deleted as soon as it is disposed.

Add Namespace

using TempFile;

Basic Usage

Writing to a 'TempFileStream' is very similar to a normal Stream. To delete of the File, either use a using-block or manually dispose the Stream.

await using (var tempFile = new TempFileStream())
{
    await tempFile.WriteAsync(Encoding.UTF8.GetBytes("Test"));
    
    // Flush forces write to disk
    await tempFile.FlushAsync();
    
    // At this point, the Temp-File still exists
}
// As soon as we leave the using-block, the Temp-File is deleted

Using StreamWriter and StreamReader

When working with the 'TempFile' you normally also want to read from it. 'TempFileStream' acts like any normal Stream, where you can reset the Position.

var path = string.Empty;

await using (var tempFile = new TempFileStream())
{
    path = tempFile.FilePath;
    var writer = new StreamWriter(tempFile, Encoding.UTF8);
    for (int i = 0; i < 5; i++)
    {
        await writer.WriteLineAsync($"Test {i}");
    }
    
    // Making sure that the data is written to disk and not still in a buffer
    await writer.FlushAsync();

    Console.WriteLine("Data has been written");
    Console.WriteLine($"Temp-File is at: {path}");
    Console.WriteLine("Press ENTER to proceed");
    Console.ReadLine();

    // We need to reset the Position of the Stream before we can read what was written before
    tempFile.Position = 0;

    var reader = new StreamReader(tempFile, Encoding.UTF8);

    while (!reader.EndOfStream)
    {
        Console.WriteLine(await reader.ReadLineAsync());
    }

    Console.WriteLine($"File Exists before exiting using-block: {File.Exists(path)}");
}
Console.WriteLine($"File Exists after exiting using-block: {File.Exists(path)}");

Console.ReadLine();