add OutputStream getter

EnvelopeGenerator.PdfEditor/Edit.cs

@@ -7,6 +7,14 @@ using System.Threading.Tasks;
 
 namespace EnvelopeGenerator.PdfEditor
 {
+    public static class Edit
+    {
+        public static Edit<MemoryStream, MemoryStream> FromMemory(byte[] documentBytes)
+        {
+            return new Edit<MemoryStream, MemoryStream>(new MemoryStream(documentBytes), new MemoryStream());
+        }
+    }
+
     public class Edit<TInputStream, TOutputStream> : IDisposable, IAsyncDisposable
         where TInputStream : Stream
         where TOutputStream : Stream
@@ -26,6 +34,26 @@ namespace EnvelopeGenerator.PdfEditor
             _doc = new PdfDocument(_reader, _writer);
         }
 
+        /// <summary>
+        /// Gets the output stream containing the edited PDF document.
+        /// </summary>
+        /// <remarks>
+        /// Accessing this property will close the underlying <see cref="PdfDocument"/> to ensure
+        /// all changes are flushed to the stream. After accessing this property, the PDF document
+        /// can no longer be modified using this <see cref="Edit{TInputStream, TOutputStream}"/> instance.
+        /// </remarks>
+        /// <returns>
+        /// The <typeparamref name="TOutputStream"/> instance that contains the updated PDF bytes.
+        /// </returns>
+        public TOutputStream OutputStream
+        {
+            get
+            {
+                _doc.Close();
+                return _outputStream;
+            }
+        }
+
         public static Edit<MemoryStream, MemoryStream> OnByte(byte[] documentBytes)
         {
             return new Edit<MemoryStream, MemoryStream>(new MemoryStream(documentBytes), new MemoryStream());

EnvelopeGenerator.Web/Controllers/EnvelopeController.cs

@@ -208,7 +208,7 @@ public class EnvelopeController : ViewControllerBase
             //add PSPDFKit licence key
             ViewData["PSPDFKitLicenseKey"] = _configuration["PSPDFKitLicenseKey"];
 
-            return View("ShowEnvelope", er);
+            return await CreateShowEnvelopeView(er);
         }
         else
         {
@@ -224,10 +224,8 @@ public class EnvelopeController : ViewControllerBase
     {
         if (er.Envelope!.Documents?.FirstOrDefault() is DocumentDto doc && doc.ByteData is not null)
         {
-            doc.ByteData = doc.ByteData.Edit(doc =>
+            var edit = Edit.FromMemory(doc.ByteData).Draw(1, canvas =>
             {
-                var page = doc.GetFirstPage();
-                var canvas = new PdfCanvas(page);
                 canvas.SetStrokeColor(ColorConstants.RED);
                 canvas.SetFillColor(ColorConstants.CYAN);
                 canvas.SetFillColorRgb(222, 220, 215);
@@ -236,17 +234,11 @@ public class EnvelopeController : ViewControllerBase
                 canvas.FillStroke();
             });
 
-            doc.ByteData = doc.ByteData.Edit(doc =>
+            edit._doc.Close();
-            {
+
-                var page = doc.GetFirstPage();
+            var foo = Convert.ToBase64String(edit.OutputStream.ToArray());
-                var canvas = new PdfCanvas(page);
+            doc.ByteData = edit.OutputStream.ToArray();
-                canvas.SetStrokeColor(ColorConstants.RED);
+
-                canvas.SetFillColor(ColorConstants.CYAN);
-                canvas.SetFillColorRgb(222, 220, 215);
-                canvas.SetLineWidth(2);
-                canvas.Rectangle(100, 500, 200, 100);
-                canvas.FillStroke();
-            });
 
             ViewData["DocumentBytes"] = doc.ByteData;
         }