Added Upload functionality; still a bit janky in selecting the files to use...

HaWeb/FileHelpers/HaDocumentWrapper.cs

@@ -1,5 +1,6 @@
 namespace HaWeb.FileHelpers;
 using HaDocument.Interfaces;
+using Microsoft.AspNetCore.Mvc.ModelBinding;
 
 public class HaDocumentWrapper : IHaDocumentWrappper {
     public ILibrary Library;
@@ -13,6 +14,18 @@ public class HaDocumentWrapper : IHaDocumentWrappper {
         return Library;
     }
 
+    public ILibrary? SetLibrary(string filepath, ModelStateDictionary ModelState) {
+        try 
+        {
+            Library = HaDocument.Document.Create(new HaWeb.Settings.HaDocumentOptions() { HamannXMLFilePath = filepath });
+        }
+        catch (Exception ex) {
+            ModelState.AddModelError("Error:", "Das Dokument konnte nicht geparst werden: " + ex.Message);
+            return null;
+        }
+        return Library;
+    }
+
     public ILibrary GetLibrary() {
         return Library;
     }