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923321: Added Redaction action
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‎ASP.NET Core/PdfViewerWebService_8.0 _redis_config/PdfViewerWebService_8.0/PdfViewerController.cs‎

Lines changed: 166 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -215,6 +215,172 @@ public IActionResult Download([FromBody] Dictionary<string, object> args)
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return Content(documentBase);
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}
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[HttpPost]
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[EnableCors("AllowAllOrigins")]
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[Route("Redaction")]
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public IActionResult Redaction([FromBody] Dictionary<string, string> jsonObject)
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{
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string RedactionText = "Redacted";
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var finalbase64 = string.Empty;
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if (jsonObject != null && jsonObject.ContainsKey("base64String"))
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{
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string base64 = jsonObject["base64String"];
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string base64String = base64.Split(new string[] { "data:application/pdf;base64," }, StringSplitOptions.None)[1];
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if (base64String != null || base64String != string.Empty)
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{
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byte[] byteArray = Convert.FromBase64String(base64String);
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Console.WriteLine("redaction");
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PdfLoadedDocument loadedDocument = new PdfLoadedDocument(byteArray);
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foreach (PdfLoadedPage loadedPage in loadedDocument.Pages)
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{
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List<PdfLoadedAnnotation> removeItems = new List<PdfLoadedAnnotation>();
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foreach (PdfLoadedAnnotation annotation in loadedPage.Annotations)
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{
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if (annotation is PdfLoadedRectangleAnnotation)
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{
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if (annotation.Author == "Redaction")
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{
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// Add the annotation to the removeItems list
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removeItems.Add(annotation);
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// Create a new redaction with the annotation bounds and color
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PdfRedaction redaction = new PdfRedaction(annotation.Bounds, annotation.Color);
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// Add the redaction to the page
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loadedPage.AddRedaction(redaction);
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annotation.Flatten = true;
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}
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if (annotation.Author == "Text")
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{
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// Add the annotation to the removeItems list
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removeItems.Add(annotation);
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// Create a new redaction with the annotation bounds and color
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PdfRedaction redaction = new PdfRedaction(annotation.Bounds);
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//Set the font family and font size
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PdfStandardFont font = new PdfStandardFont(PdfFontFamily.Courier, 8);
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//Create the appearance like repeated text in the redaction area
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CreateRedactionAppearance(redaction.Appearance.Graphics, PdfTextAlignment.Left, true, new SizeF(annotation.Bounds.Width, annotation.Bounds.Height), RedactionText, font, PdfBrushes.Red);
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// Add the redaction to the page
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loadedPage.AddRedaction(redaction);
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annotation.Flatten = true;
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}
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//Apply the pattern for the Redaction
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if (annotation.Author == "Pattern")
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{
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// Add the annotation to the removeItems list
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removeItems.Add(annotation);
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// Create a new redaction with the annotation bounds and color
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PdfRedaction redaction = new PdfRedaction(annotation.Bounds);
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Syncfusion.Drawing.RectangleF rect = new Syncfusion.Drawing.RectangleF(0, 0, 8, 8);
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PdfTilingBrush tillingBrush = new PdfTilingBrush(rect);
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tillingBrush.Graphics.DrawRectangle(PdfBrushes.Gray, new Syncfusion.Drawing.RectangleF(0, 0, 2, 2));
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tillingBrush.Graphics.DrawRectangle(PdfBrushes.White, new Syncfusion.Drawing.RectangleF(2, 0, 2, 2));
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tillingBrush.Graphics.DrawRectangle(PdfBrushes.LightGray, new Syncfusion.Drawing.RectangleF(4, 0, 2, 2));
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tillingBrush.Graphics.DrawRectangle(PdfBrushes.DarkGray, new Syncfusion.Drawing.RectangleF(6, 0, 2, 2));
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tillingBrush.Graphics.DrawRectangle(PdfBrushes.White, new Syncfusion.Drawing.RectangleF(0, 2, 2, 2));
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tillingBrush.Graphics.DrawRectangle(PdfBrushes.LightGray, new Syncfusion.Drawing.RectangleF(2, 2, 2, 2));
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tillingBrush.Graphics.DrawRectangle(PdfBrushes.Black, new Syncfusion.Drawing.RectangleF(4, 2, 2, 2));
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tillingBrush.Graphics.DrawRectangle(PdfBrushes.LightGray, new Syncfusion.Drawing.RectangleF(6, 2, 2, 2));
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tillingBrush.Graphics.DrawRectangle(PdfBrushes.LightGray, new Syncfusion.Drawing.RectangleF(0, 4, 2, 2));
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tillingBrush.Graphics.DrawRectangle(PdfBrushes.DarkGray, new Syncfusion.Drawing.RectangleF(2, 4, 2, 2));
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tillingBrush.Graphics.DrawRectangle(PdfBrushes.LightGray, new Syncfusion.Drawing.RectangleF(4, 4, 2, 2));
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tillingBrush.Graphics.DrawRectangle(PdfBrushes.White, new Syncfusion.Drawing.RectangleF(6, 4, 2, 2));
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tillingBrush.Graphics.DrawRectangle(PdfBrushes.Black, new Syncfusion.Drawing.RectangleF(0, 6, 2, 2));
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tillingBrush.Graphics.DrawRectangle(PdfBrushes.LightGray, new Syncfusion.Drawing.RectangleF(2, 6, 2, 2));
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tillingBrush.Graphics.DrawRectangle(PdfBrushes.Black, new Syncfusion.Drawing.RectangleF(4, 6, 2, 2));
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tillingBrush.Graphics.DrawRectangle(PdfBrushes.DarkGray, new Syncfusion.Drawing.RectangleF(6, 6, 2, 2));
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rect = new Syncfusion.Drawing.RectangleF(0, 0, 16, 14);
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PdfTilingBrush tillingBrushNew = new PdfTilingBrush(rect);
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tillingBrushNew.Graphics.DrawRectangle(tillingBrush, rect);
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//Set the pattern for the redaction area
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redaction.Appearance.Graphics.DrawRectangle(tillingBrushNew, new Syncfusion.Drawing.RectangleF(0, 0, annotation.Bounds.Width, annotation.Bounds.Height));
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// Add the redaction to the page
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loadedPage.AddRedaction(redaction);
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annotation.Flatten = true;
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}
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}
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else if (annotation is PdfLoadedRubberStampAnnotation)
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{
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if (annotation.Author == "Image")
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{
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Stream[] images = PdfLoadedRubberStampAnnotationExtension.GetImages(annotation as PdfLoadedRubberStampAnnotation);
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// Create a new redaction with the annotation bounds and color
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PdfRedaction redaction = new PdfRedaction(annotation.Bounds);
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images[0].Position = 0;
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PdfImage image = new PdfBitmap(images[0]);
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//Apply the image to redaction area
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redaction.Appearance.Graphics.DrawImage(image, new Syncfusion.Drawing.RectangleF(0, 0, annotation.Bounds.Width, annotation.Bounds.Height));
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// Add the redaction to the page
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loadedPage.AddRedaction(redaction);
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annotation.Flatten = true;
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}
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}
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}
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foreach (PdfLoadedAnnotation annotation1 in removeItems)
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{
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loadedPage.Annotations.Remove(annotation1);
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}
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}
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loadedDocument.Redact();
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MemoryStream stream = new MemoryStream();
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loadedDocument.Save(stream);
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stream.Position = 0;
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loadedDocument.Close(true);
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byteArray = stream.ToArray();
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finalbase64 = "data:application/pdf;base64," + Convert.ToBase64String(byteArray);
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stream.Dispose();
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return Content(finalbase64);
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}
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}
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return Content("data:application/pdf;base64," + "");
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}
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//The Method used for apply the text in the full area of redaction rectangle
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private static void CreateRedactionAppearance(PdfGraphics graphics, PdfTextAlignment alignment, bool repeat, SizeF size, string overlayText, PdfFont font, PdfBrush textcolor)
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{
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float col = 0, row;
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if (font == null) font = new PdfStandardFont(PdfFontFamily.Helvetica, 10);
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int textAlignment = Convert.ToInt32(alignment);
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float y = 0, x = 0, diff = 0;
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Syncfusion.Drawing.RectangleF rect;
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Syncfusion.Drawing.SizeF textsize = font.MeasureString(overlayText);
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if (repeat)
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{
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col = size.Width / textsize.Width;
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row = (float)Math.Floor(size.Height / font.Size);
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diff = Math.Abs(size.Width - (float)(Math.Floor(col) * textsize.Width));
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if (textAlignment == 1)
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x = diff / 2;
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if (textAlignment == 2)
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x = diff;
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for (int i = 1; i < col; i++)
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{
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for (int j = 0; j < row; j++)
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{
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rect = new Syncfusion.Drawing.RectangleF(x, y, 0, 0);
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graphics.DrawString(overlayText, font, textcolor, rect);
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y = y + font.Size;
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}
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x = x + textsize.Width;
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y = 0;
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}
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}
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else
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{
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diff = Math.Abs(size.Width - textsize.Width);
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if (textAlignment == 1)
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{
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x = diff / 2;
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}
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if (textAlignment == 2)
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{
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x = diff;
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}
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rect = new Syncfusion.Drawing.RectangleF(x, 0, 0, 0);
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graphics.DrawString(overlayText, font, textcolor, rect);
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}
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}
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[HttpPost]
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[EnableCors("AllowAllOrigins")]
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[Route("SaveUrl")]

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