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public IActionResult Download([FromBody]
Dictionary<string, string> jsonObject)
{
//Initialize the PDF Viewer
object with memory cache object
PdfRenderer pdfviewer = new
PdfRenderer(_cache);
string documentBase =
pdfviewer.GetDocumentAsBase64(jsonObject);
string base64Data =
documentBase.Split("base64,")[1];
byte[] document1 =
Convert.FromBase64String(base64Data);
PdfLoadedDocument ldoc = new
PdfLoadedDocument(document1);
FileStream fontStream = new
FileStream(GetDocumentPath("tahoma.ttf"), FileMode.Open,
FileAccess.ReadWrite);
for (int i = 0; i <
ldoc.Pages.Count; i++)
{
PdfLoadedPage lpage =
ldoc.Pages[i] as PdfLoadedPage;
for (int j = 0; j <
lpage.Annotations.Count; j++)
{
PdfLoadedFreeTextAnnotation lAnnot = lpage.Annotations[j] as
PdfLoadedFreeTextAnnotation;
if (lAnnot != null)
{
// If this condition
is required then you can use it.
//if
(IsThaiCharacter(lAnnot.MarkUpText))
{
fontStream.Position = 0;
lAnnot.Font = new
PdfTrueTypeFont(fontStream, lAnnot.Font.Size);
lAnnot.ComplexScript = true;
lAnnot.SetAppearance(true);
}
}
}
}
MemoryStream stream = new
MemoryStream();
ldoc.Save(stream);
string base64string =
Convert.ToBase64String((stream as MemoryStream).ToArray());
ldoc.EnableMemoryOptimization =
true;
ldoc.Close(true);
stream.Dispose();
return
Content("data:application/pdf;base64," + base64string);
}
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