Update Stunde.cs

Jugenddienst Stunden/Models/Stunde.cs

@@ -129,12 +129,14 @@ namespace Jugenddienst_Stunden.Models {
 			//Hours = hours;
 			return daytimes;
 		}
-
+		public event EventHandler<string> AlertEvent;
 		public static async Task<DayTime> LoadEntry(int id) {
 
 			var tokendata = new TokenData(apiKey);
 
 			var data = await Auth.GetApiDataWithAuthAsync(tokendata.url + "?id=" + id, tokendata.apiKey);
+			if(String.IsNullOrEmpty(data))
+				AlertEvent?.Invoke(this, "Auswahl enthält keine Daten");
 
 			//DayTime hours = Hours.daytime.Find(x => x.id == id);
 			DayTime hours = JsonConvert.DeserializeObject<DayTime>(data);