通过NameValuePairsValueProvider对象来获取指定前缀的Key

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Web.Http.ValueProviders.Providers;
 5 
 6 namespace ConsoleApp
 7 {
 8     internal class Program
 9     {
10         private static void Main(string[] args)
11         {
12             var dic = new Dictionary<string, string>
13             {
14                 {"contact.Name", "张三"},
15                 {"contact.PhoneNo", "123456789"},
16                 {"contact.EmailAddress", "zhangsan@gmail.com"},
17                 {"contact.Address.Province", "上海"},
18                 {"contact.Address.City", "上海"},
19                 {"contact.Address.District", "长宁区"},
20                 {"contact.Address.Street", "金钟路968号"}
21             };
22             var valueProvider = new NameValuePairsValueProvider(dic.ToArray(), null);
23 
24             // prefix=""
25             Console.WriteLine("Prefix: <Empty>");
26             Console.WriteLine("{0,-14}{1}", "key", "value");
27             var keys = valueProvider.GetKeysFromPrefix(string.Empty);
28             foreach (var item in keys)
29             {
30                 Console.WriteLine("{0,-14}{1}", item.Key, item.Value);
31             }
32 
33             // Prefix="contact"
34             Console.WriteLine("Prefix: contact");
35             Console.WriteLine("{0,-14}{1}", "key", "value");
36             keys = valueProvider.GetKeysFromPrefix("contact");
37             foreach (var item in keys)
38             {
39                 Console.WriteLine("{0,-14}{1}", item.Key, item.Value);
40             }
41 
42             // Prefix="contact"
43             Console.WriteLine("Prefix: contact.Address");
44             Console.WriteLine("{0,-14}{1}", "key", "value");
45             keys = valueProvider.GetKeysFromPrefix("contact.Address");
46             foreach (var item in keys)
47             {
48                 Console.WriteLine("{0,-14}{1}", item.Key, item.Value);
49             }
50 
51             Console.Read();
52         }
53     }
54 }