update vor Syncfusion-Aktualisierung

Client/Helper/ConvertHelper.cs

@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
+using System.Net.Http.Headers;
 using System.Text;
 using System.Threading.Tasks;
 
@@ -22,5 +23,34 @@ namespace OnDoc.Helper
 
         //    return image;
         //}
+
+        public enum DateTimeFormat{
+            datumshort,
+            datummedium,
+            datumlong,
+
+        }
+        public static string Datum(DateTime date, DateTimeFormat format) {
+            switch (format)
+            {
+                case DateTimeFormat.datumshort:
+                    return date.ToShortDateString();
+                    break;
+                case DateTimeFormat.datummedium:
+                    return date.ToString("dd.MMMM yyyy");
+                    break;
+                case DateTimeFormat.datumlong:
+                    return date.ToLongDateString();
+                    break;
+                default:
+                    return date.ToShortDateString();
+            }
+        
+
+
+
+
+            return date.ToString("dd.mm.yyyy");
+        }
     }
 }