Obtaining Download Progress

You can call GetObjectRequest.DownloadProgress to register the System.EventHandler callback function to obtain download progress. Sample code is as follows:

// Initialize configuration parameters.
ObsConfig config = new ObsConfig();
config.Endpoint = "https://your-endpoint";
// Hard-coded or plaintext AK/SK are risky. For security purposes, encrypt your AK/SK and store them in the configuration file or environment variables. In this example, the AK/SK are stored in environment variables for identity authentication. Before running this example, configure environment variables AccessKeyID and SecretAccessKey.
// Obtain an AK/SK pair on the management console. For details, see https://support.huaweicloud.com/eu/usermanual-ca/ca_01_0003.html.
string accessKey= Environment.GetEnvironmentVariable("AccessKeyID", EnvironmentVariableTarget.Machine);
string secretKey= Environment.GetEnvironmentVariable("SecretAccessKey", EnvironmentVariableTarget.Machine);
// Create an instance of ObsClient.
ObsClient client = new ObsClient(accessKey, secretKey, config);
// Download an object.
try
{
    GetObjectRequest request = new GetObjectRequest()
    {
        BucketName = "bucketname",
        ObjectKey = "objectname",
    };
    // Represent the progress by showing how many bytes have been downloaded.
    request.ProgressType = ProgressTypeEnum.ByBytes;
    // Refresh the download progress each time 1 MB data is downloaded.
    request.ProgressInterval = 1024 * 1024;

    // Register the download progress callback function. 
    request.DownloadProgress += delegate(object sender, TransferStatus status){
        // Obtain the average download rate.
        Console.WriteLine("AverageSpeed: {0}", status.AverageSpeed / 1024  + "KB/S");
        // Obtain the download progress in percentage.
        Console.WriteLine("TransferPercentage: {0}", status.TransferPercentage);
    };
    using (GetObjectResponse response = client.GetObject(request))
    {
        string dest = "savepath";
        if (!File.Exists(dest))
        {
           // Write the data streams into the file.
            response.WriteResponseStreamToFile(dest);
        }
        Console.WriteLine("Get object response: {0}", response.StatusCode);
    }
 }
catch (ObsException ex)
{
   Console.WriteLine("ErrorCode: {0}", ex.ErrorCode);
   Console.WriteLine("ErrorMessage: {0}", ex.ErrorMessage);
}