Document Manager Tech Tips & Tricks

PDF Upload

• HTTP Async read
• Transaction Scope
• Pages Count (Aspose)
• IE Preview issue
• Enterprise Library

HTTP Async

public postCachePdf(pdf:Blob) : HttpObservable<any> {
    return this.http.post("ScanDocument", "PostStoredPdf", pdf);
}

public async Task<JObject> PostStoredPdf(HttpRequestMessage request)
{
    var filesReadToProvider = await request.Content.ReadAsMultipartAsync();

    foreach (var stream in filesReadToProvider.Contents)
    {
        var fileBytes = await stream.ReadAsByteArrayAsync();

        ...
    }
}

Transaction Scope

[HttpPost]
[SkipTransactionScopeFilter]
public async Task<JObject> PostStoredPdf(HttpRequestMessage request)
{
    ...
}

// .NET 4.5.1 +
new TransactionScope(TransactionScopeAsyncFlowOption.Enabled)

PDF Pages Count

public int GetPdfPageCount(byte[] aDocument)
{
    MemoryStream ms = new MemoryStream(aDocument);
    ms.Position = 0;

    Aspose.Pdf.Facades.PdfViewer viewer = new Aspose.Pdf.Facades.PdfViewer();
    viewer.BindPdf(ms);

    return viewer.PageCount;
}

General

• Flow
• Browse
• Zoom (scale)
• Caman

Flow

Blob

createObjectURL

TIFF.js

Canvas

Iframe

Get PDF URL

Upload + Get temp URL

Browse

Load

PDF

Caman

PDF