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WordDocWriter.cs
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WordDocWriter.cs
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using Azure.Storage.Blobs.Specialized;
using DocumentFormat.OpenXml;
using DocumentFormat.OpenXml.Packaging;
using DocumentFormat.OpenXml.Wordprocessing;
internal class WordDocWriter
{
public static void AppendContentToLocalFile(string path, string content)
{
using (var stream = File.OpenWrite(path))
{
using (WordprocessingDocument wordprocessingDocument = WordprocessingDocument.Open(stream, true))
{
if (content is null)
{
throw new ArgumentNullException(nameof(content));
}
MainDocumentPart? mainPart = wordprocessingDocument.MainDocumentPart;
if (mainPart is null)
{
throw new InvalidOperationException("The main document part is missing.");
}
Body? body = mainPart.Document.Body;
if (body is null)
{
throw new InvalidOperationException("The document body is missing.");
}
Paragraph para = body.AppendChild(new Paragraph());
Run run = para.AppendChild(new Run());
run.AppendChild(new Text(content));
}
}
}
public static async Task AppendContentToBlob(string blobUri, string content)
{
var blobClient = new BlockBlobClient(new Uri(blobUri));
await _CreateBlobIfNotExists(blobClient);
//NOTE: this is an inefficient implementation, we download the blob, open it, append, then upload it
//couldn't get AppendBlob or BlockBlob to work nicely with OOXML SDK so this is the workaround for now
var tempFile = Path.GetTempFileName();
using (var stream = new FileStream(tempFile, FileMode.OpenOrCreate))
{
await blobClient.DownloadToAsync(stream);
stream.Position = 0;
using (WordprocessingDocument wordprocessingDocument = WordprocessingDocument.Open(stream, true))
{
if (content is null)
{
throw new ArgumentNullException(nameof(content));
}
MainDocumentPart? mainPart = wordprocessingDocument.MainDocumentPart;
if (mainPart is null)
{
throw new InvalidOperationException("The main document part is missing.");
}
Body? body = mainPart.Document.Body;
if (body is null)
{
throw new InvalidOperationException("The document body is missing.");
}
Paragraph para = body.AppendChild(new Paragraph());
Run run = para.AppendChild(new Run());
run.AppendChild(new Text(content));
wordprocessingDocument.Save();
}
stream.Position = 0;
await blobClient.UploadAsync(stream);
}
}
private static async Task _CreateBlobIfNotExists(BlockBlobClient blobClient)
{
if (!await blobClient.ExistsAsync())
{
using (var ms = new MemoryStream())
{
var d = WordprocessingDocument.Create(ms, WordprocessingDocumentType.Document);
var mainPart = d.AddMainDocumentPart();
mainPart.Document = new Document();
mainPart.Document.AppendChild(new Body());
d.Save();
ms.Position = 0;
await blobClient.UploadAsync(ms);
}
}
}
}