添加项目文件。

XXCpzs/Services/CustomerDataService.cs

@@ -0,0 +1,25 @@
+using System.Collections.Generic;
+using System.Linq;
+using XXCpzs.Models;
+
+namespace XXCpzs.Services
+{
+    public class CustomerDataService
+    {
+        public static List<Customer> Fruits { get; set; } = new List<Customer>
+        {
+
+        };
+
+        public static List<Customer> GetSearchResults(string queryString)
+        {
+            var normalizedQuery = queryString?.ToLower() ?? "";
+            return Fruits.Where<Customer>(f => f.company.ToLowerInvariant().Contains(normalizedQuery) || f.contacts.ToLowerInvariant().Contains(normalizedQuery) || f.phone.ToLowerInvariant().Contains(normalizedQuery)).ToList();
+        }
+        public static void AddItem(Customer item)
+        {
+            Fruits.Add(item);
+        }
+
+    }
+}