/// <summary>
/// Deletes the raw data object identified by the key <paramref name="rawDataKey"/> and the part with uuid <paramref name="partUuid"/>.
/// </summary>
/// <param name="client">The client class to use.</param>
/// <param name="partUuid">The uuid of the part the raw data objects belongs to.</param>
/// <param name="rawDataKey">The key of the raw data object which should be deleted.</param>
/// <param name="cancellationToken">A token to cancel the asynchronous operation.</param>
/// <exception cref="ArgumentNullException"><paramref name="client"/> is <see langword="null" />.</exception>
public static Task DeleteRawDataForPart([NotNull] this IRawDataServiceRestClient client, Guid partUuid, int?rawDataKey = null, CancellationToken cancellationToken = default)
{
if (client == null)
{
throw new ArgumentNullException(nameof(client));
}
return(client.DeleteRawData(RawDataTargetEntityDto.CreateForPart(partUuid), rawDataKey, cancellationToken));
}
public static async Task Lesson(DataServiceRestClient client, RawDataServiceRestClient rawClient)
{
await client.CreateParts(new[] { Part });
//PiWeb only accepts binary data
var data = Encoding.UTF8.GetBytes("Hello RawDataService!");
var target = RawDataTargetEntityDto.CreateForPart(Part.Uuid);
//Notes: - see e.g. http://wiki.selfhtml.org/wiki/Referenz:MIME-Typen for a complete list of mime types
// - When using Key = -1, the server will generate a new key. The generated key can be read from the result.
var createdRawDataInfo = await rawClient.CreateRawData(new RawDataInformationDto
{
FileName = "Hello.txt",
MimeType = "text/plain",
Key = -1,
Created = DateTime.Now,
LastModified = DateTime.Now,
MD5 = new Guid(MD5.Create().ComputeHash(data)),
Size = data.Length,
Target = target
}, data);
Console.WriteLine($"RawData created with key: {createdRawDataInfo.Key}");
//We can simply update raw data information like filename or MIME-type
if (createdRawDataInfo.Key.HasValue)
{
createdRawDataInfo.FileName = "HelloEdit.txt";
Console.WriteLine($"Renaming raw data file to {createdRawDataInfo.FileName}");
await rawClient.UpdateRawDataInformation(target, createdRawDataInfo.Key.Value, createdRawDataInfo);
}
var rawDataInformation = await rawClient.ListRawData(new[] { target });
foreach (var information in rawDataInformation)
{
Console.WriteLine($"Fetching {information.FileName}: {information.Size} bytes");
//Fetch the data by providing the correct RawDataInformation
data = await rawClient.GetRawData(information);
Console.WriteLine($"Content: {Encoding.UTF8.GetString( data )}");
//We can use the key we found with the ListRawData function to delete a single file
await rawClient.DeleteRawDataForPart(Part.Uuid, information.Key);
}
//Or we simply delete all raw data for a certain entity
await rawClient.DeleteRawDataForPart(Part.Uuid);
}
