Update 20240909

DOCGEN/Klassen/SyncFPowerPoint.cs

@@ -0,0 +1,41 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Syncfusion.Presentation;
+using Syncfusion.XlsIO;
+
+namespace DOCGEN.Klassen
+{
+    public class SyncFPowerPoint
+    {
+        public bool create_nativ(string property, string value, string base64, string originalfile, string destfile)
+        {
+            FileStream ms = new FileStream(originalfile, FileMode.Open, FileAccess.Read);
+            //FileStream os = new FileStream(destfile, FileMode.Create);
+            IPresentation pptxDoc = Presentation.Open(originalfile);
+            try
+            {
+                pptxDoc.CustomDocumentProperties.Add(property);
+                pptxDoc.CustomDocumentProperties[property].Value = value;
+            }
+            catch
+            {
+                pptxDoc.CustomDocumentProperties.Add(property);
+                pptxDoc.CustomDocumentProperties[property].Value = value;
+
+            }
+            ms.Close();
+            ms.Dispose();
+            pptxDoc.Save(destfile);
+            
+            //os.Close();
+            //os.Dispose();
+            return true;
+
+        }
+    }
+}
+