添加项目文件。

OrpaonEMS.App/ViewModels/FFViewModel.cs

@@ -0,0 +1,21 @@
+using OrpaonEMS.App.Services;
+using OrpaonEMS.Core;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace OrpaonEMS.App.ViewModels
+{
+    public class FFViewModel : NavigationViewModel
+    {
+        public FFViewModel(FFService fFService)
+        {
+            FFServiceData = fFService;
+        }
+
+
+        public FFService FFServiceData { get; set; }
+    }
+}