Azure Data Lake .NET SDK Samples

Sample: Create a File System

Creates a new file system (container) in an Azure Data Lake Storage Gen2 account.

using Azure;
using Azure.Storage.Files.DataLake;
using Azure.Identity;

string accountName = "";
string fileSystemName = "sample-fs";

var serviceUri = new Uri($"https://{accountName}.dfs.core.windows.net");
var client = new DataLakeServiceClient(serviceUri, new DefaultAzureCredential());

await client.CreateFileSystemAsync(fileSystemName);
Console.WriteLine($"File system '{fileSystemName}' created.");

Sample: Upload a File

Uploads a local file to a directory in the file system.

using Azure.Storage.Files.DataLake;
using Azure.Identity;

string accountName = "";
string fileSystemName = "sample-fs";
string directoryName = "mydir";
string localFilePath = @"C:\temp\data.txt";

var serviceUri = new Uri($"https://{accountName}.dfs.core.windows.net");
var client = new DataLakeServiceClient(serviceUri, new DefaultAzureCredential());

var fileSystemClient = client.GetFileSystemClient(fileSystemName);
var directoryClient = fileSystemClient.GetDirectoryClient(directoryName);
await directoryClient.CreateIfNotExistsAsync();

var fileClient = directoryClient.GetFileClient(System.IO.Path.GetFileName(localFilePath));
await fileClient.UploadAsync(localFilePath, true);
Console.WriteLine("File uploaded successfully.");

Sample: Download a File

Downloads a file from a Data Lake directory to the local machine.

using Azure.Storage.Files.DataLake;
using Azure.Identity;

string accountName = "";
string fileSystemName = "sample-fs";
string directoryName = "mydir";
string fileName = "data.txt";
string downloadPath = @"C:\temp\downloaded-data.txt";

var serviceUri = new Uri($"https://{accountName}.dfs.core.windows.net");
var client = new DataLakeServiceClient(serviceUri, new DefaultAzureCredential());

var fileClient = client.GetFileSystemClient(fileSystemName)
                      .GetDirectoryClient(directoryName)
                      .GetFileClient(fileName);

await fileClient.ReadToAsync(downloadPath);
Console.WriteLine($"File downloaded to {downloadPath}");

Sample: Delete a Directory Recursively

Deletes a directory and all its contents.

using Azure.Storage.Files.DataLake;
using Azure.Identity;

string accountName = "";
string fileSystemName = "sample-fs";
string directoryName = "mydir";

var serviceUri = new Uri($"https://{accountName}.dfs.core.windows.net");
var client = new DataLakeServiceClient(serviceUri, new DefaultAzureCredential());

var directoryClient = client.GetFileSystemClient(fileSystemName)
                           .GetDirectoryClient(directoryName);

await directoryClient.DeleteAsync(recursive: true);
Console.WriteLine($"Directory '{directoryName}' deleted.");