public async Task <Unit> Handle(SaveToCsv request, CancellationToken cancellationToken)
{
StreamWriter streamWriter = new StreamWriter(request.FilePath);
CsvWriter csvWriter = new CsvWriter(streamWriter, CultureInfo.InvariantCulture);
await csvWriter.WriteRecordsAsync(request.Collection);
await csvWriter.DisposeAsync();
await _eventBus.Publish(new RecordsSavedToFile(request.FilePath, request.Collection.Count), cancellationToken);
return(Unit.Value);
}
public static async Task <byte[]> GetCsvByteArrayAsync <T>(this IEnumerable list)
where T : ClassMap
{
MemoryStream ms = null;
StreamWriter writer = null;
CsvWriter csv = null;
try
{
var config = new CsvConfiguration(CultureInfo.InvariantCulture)
{
SanitizeForInjection = true
};
ms = new MemoryStream();
writer = new StreamWriter(ms, Encoding.UTF8);
csv = new CsvWriter(writer, config);
csv.Context.RegisterClassMap <T>();
await csv.WriteRecordsAsync(list);
await csv.FlushAsync();
await writer.FlushAsync();
await ms.FlushAsync();
return(ms.ToArray());
}
finally
{
if (csv != null)
{
await csv.DisposeAsync();
}
if (writer != null)
{
await writer.DisposeAsync();
}
if (ms != null)
{
await ms.DisposeAsync();
}
}
}
public static async Task <string> CreateFile(int rows, string location = "", bool overwrite = false)
{
_userGenerator = new Faker <User>()
.RuleFor(u => u.Firstname, f => f.Name.FirstName())
.RuleFor(u => u.Lastname, f => f.Name.LastName())
.RuleFor(u => u.Avatar, f => f.Internet.Avatar())
.RuleFor(u => u.Username, (f, u) => f.Internet.UserName(u.Firstname, u.Lastname))
.RuleFor(u => u.Email, (f, u) => f.Internet.Email(u.Firstname, u.Lastname))
.RuleFor(u => u.SomethingUnique, f => $"Value {f.UniqueIndex}")
.RuleFor(u => u.SomeGuid, Guid.NewGuid);
var filename = $"unsorted.{rows}.csv";
var path = string.IsNullOrWhiteSpace(location) ? Path.Combine(FileLocation, filename) : Path.Combine(location, filename);
if (!overwrite)
{
if (File.Exists(path))
{
Console.WriteLine($"File '{path}' already exists");
return(filename);
}
}
Console.WriteLine($"Creating {path}...");
await using var writer = new StreamWriter(path, append: false);
await using var csv = new CsvWriter(writer, CultureInfo.InvariantCulture);
for (int i = 0; i < rows; i++)
{
csv.WriteRecord(_userGenerator.Generate());
await csv.NextRecordAsync();
}
await csv.DisposeAsync();
await writer.DisposeAsync();
return(filename);
}
public async ValueTask DisposeAsync()
{
await writer.DisposeAsync();
await stream.DisposeAsync();
}
public async Task <OpenReddingLink> CreateBlobWithContents(IEnumerable <object>?results, CancellationToken cancellationToken)
{
ArgumentValidation.CheckNotNull(results, nameof(results));
// Create a temp folder
_logger.LogInformation("Creating temporary file resources...");
string tempFolder = $"{Directory.GetCurrentDirectory()}\\Temp";
string fileName = "salaries-" + Guid.NewGuid().ToString() + ".csv";
string tempFilePath = Path.Combine(tempFolder, fileName);
_logger.LogInformation($"File to create: {tempFilePath}");
if (!Directory.Exists(tempFolder))
{
_logger.LogInformation($"{tempFolder} directory does not exist, creating...");
Directory.CreateDirectory(tempFolder);
_logger.LogInformation($"{tempFolder} directory created successfully!");
}
// Write text to the file
_logger.LogInformation($"Writing file contents to {tempFilePath}");
using var writer = new StreamWriter(tempFilePath);
using var csv = new CsvWriter(writer, CultureInfo.InvariantCulture);
csv.WriteRecords(results);
// Dispose of stream resources
await writer.DisposeAsync();
await csv.DisposeAsync();
_logger.LogInformation($"CSV file created successfully, uploading blob to container: {_blobContainerClient.Name}");
// Get a reference to a blob
BlobClient blobClient = _blobContainerClient.GetBlobClient(fileName);
// Open the file and upload its data
_logger.LogInformation($"Updated file contents to blob location: {blobClient.Uri}");
using FileStream uploadFileStream = File.OpenRead(tempFilePath);
await blobClient.UploadAsync(uploadFileStream, true, cancellationToken : cancellationToken);
uploadFileStream.Close();
_logger.LogInformation("Blob successfully uploaded, cleaning up temporary resources...");
// Clean up temporary resources
File.Delete(tempFilePath);
foreach (var file in Directory.GetFiles(tempFolder))
{
_logger.LogInformation($"Additional files detected in {tempFolder}, removing file {file}...");
File.Delete(file);
_logger.LogInformation($"{file} removed successfully!");
}
_logger.LogInformation($"Deleting temporary directory {tempFolder}...");
Directory.Delete(tempFolder);
_logger.LogInformation($"{tempFolder} successfully removed, returning blob URI: {blobClient.Uri.AbsoluteUri}");
// Return the link to the blob
return(new OpenReddingLink
{
Href = blobClient.Uri.AbsoluteUri,
Method = nameof(HttpMethod.Get),
});
}
