Convert the PDF file into base64 string and pass it to the webbrowser control

PDFFile_webbrowser_invoke.cs

            if (locateText.Text.EndsWith("pdf", true, null) == true && 
                File.Exists(locateText.Text) == true)
            {
                var buffer = File.ReadAllBytes(locateText.Text);

                // Document.InvokeScript seems not understanding the Blob type
                //object[] args = { fileBytes };
                //webBrowser1.Document.InvokeScript("PDFViewerApplication.open", args);

                // so convert it to base64 and pass it
                var asBase64 = Convert.ToBase64String(buffer);
                webBrowser1.Document.InvokeScript("openPdfAsBase64", new[] { asBase64 });