Insert Image into Dynamically create PDF in AZURE BLOB Storage - azure

Question

I created one dynamic PDF in AZURE BLOB Storage. All content is write perfectly. Now I want to add Image at top of the PDF content from one of blob storage. For create PDF my code is as below :
//Parse the connection string and return a reference to the storage account.
CloudStorageAccount storageAccount = CloudStorageAccount.Parse(CloudConfigurationManager.GetSetting("connectionstring"));
//Create the blob client object.
CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();
//Get a reference to a container to use for the sample code, and create it if it does not exist.
CloudBlobContainer container = blobClient.GetContainerReference("containername");
container.CreateIfNotExists();
MemoryStream ms1 = new MemoryStream();
ms1.Position = 0;
using (ms1)
{
var doc1 = new iTextSharp.text.Document();
PdfWriter writer = PdfWriter.GetInstance(doc1, ms1);
doc1.Open();
doc1.Add(new Paragraph("itextSharp DLL"));
doc1.Close();
var byteArray = ms1.ToArray();
var blobName = "testingCREATEPDF.pdf";
var blob = container.GetBlockBlobReference(blobName);
blob.Properties.ContentType = "application/pdf";
blob.UploadFromByteArray(byteArray, 0, byteArray.Length);
}
Please let me know how to add image at top of PDF from azure blob.

Answer 1

Try the code below. Basically the trick is to read the blob's data as a stream and create an iTextSharp.text.Image from that stream. Once you have that object, you can insert it in your PDF document.
private static void CreatePdf()
{
var account = new CloudStorageAccount(new StorageCredentials(accountName, accountKey), true);
var blobClient = account.CreateCloudBlobClient();
var container = blobClient.GetContainerReference("pdftest");
container.CreateIfNotExists();
var imagesContainer = blobClient.GetContainerReference("images");
var imageName = "Storage-blob.png";
using (MemoryStream ms = new MemoryStream())
{
var doc = new iTextSharp.text.Document();
PdfWriter writer = PdfWriter.GetInstance(doc, ms);
doc.Open();
doc.Add(new Paragraph("Hello World"));
var imageBlockBlob = imagesContainer.GetBlockBlobReference(imageName);
using (var stream = new MemoryStream())
{
imageBlockBlob.DownloadToStream(stream);//Read blob contents in stream.
stream.Position = 0;//Reset the stream's position to top.
Image img = Image.GetInstance(stream);//Create am instance of iTextSharp.text.image.
doc.Add(img);//Add that image to the document.
}
doc.Close();
var byteArray = ms.ToArray();
var blobName = (DateTime.MaxValue.Ticks - DateTime.Now.Ticks).ToString() + ".pdf";
var blob = container.GetBlockBlobReference(blobName);
blob.Properties.ContentType = "application/pdf";
blob.UploadFromByteArray(byteArray, 0, byteArray.Length);
}
}