Load document from Azure Blob Storage
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The following code snippet shows how to load a document from Azure Blob Storage.
string blobName = "sample.pdf";
using (Annotator annotator = new Annotator(DownloadFile(blobName)))
{
AreaAnnotation area = new AreaAnnotation()
{
Box = new Rectangle(100, 100, 100, 100),
BackgroundColor = 65535,
};
annotator.Add(area);
annotator.Save("result.pdf");
}
public static Stream DownloadFile(string blobName)
{
CloudBlobContainer container = GetContainer();
CloudBlob blob = container.GetBlobReference(blobName);
MemoryStream memoryStream = new MemoryStream();
blob.DownloadToStream(memoryStream);
memoryStream.Position = 0;
return memoryStream;
}
private static CloudBlobContainer GetContainer()
{
string accountName = "***";
string accountKey = "***";
string endpoint = $"https://{accountName}.blob.core.windows.net/";
string containerName = "***";
StorageCredentials storageCredentials = new StorageCredentials(accountName, accountKey);
CloudStorageAccount cloudStorageAccount = new CloudStorageAccount(
storageCredentials, new Uri(endpoint), null, null, null);
CloudBlobClient cloudBlobClient = cloudStorageAccount.CreateCloudBlobClient();
CloudBlobContainer container = cloudBlobClient.GetContainerReference(containerName);
container.CreateIfNotExists();
return container;
}
NoteNOTE: Package WindowsAzure.Storage version 9.3.3 should be referenced
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