แก้บักด่วน

Models/eva_performance_plan/eva_performance_planEntity.cs

@@ -27,7 +27,20 @@ namespace TodoAPI2.Models
         public DateTime? end_leave { get; set; }
 
         [NotMapped]
-        public string display_text { get; set; }
+        public string display_text
+        {
+            get
+            {
+                if (!theTime.HasValue || !fiscal_year.HasValue)
+                {
+                    return "";
+                }
+                else
+                {
+                    return theTime.ToString() + "/" + fiscal_year.ToString();
+                }
+            }
+        }
 
 
         public void SetAutoField(DataContext context)