select省市联动选择城市 asp.net mvc4

本文在 http://www.cnblogs.com/darrenji/p/3606703.html（感谢博主的分享）基础上加入全国各省市，从文件中读取全国省市县，组成省市联动的选择标签

 

在Model里定义Province 和 City

        public class Province
        {
            public int ID { get; set; }
            public string Name { get; set; }
        }

        public class City
        {
            public int ID { get; set; }
            public int ProvinceID { get; set; }
            public string Name { get; set; }
            public string ZipCode { get; set; }
        }    

 

在control里定义全局变量：

1         public static List<Province> prolist = new List<Province>();
2         public static int pronum = 0;
3         public static List<City> citlist = new List<City>();
4         public static int citnum = 0;

在control里读取文件生成prolist和citlist

 1 public static void FileIO()
 2         {
 3 
 4             var path = System.Web.HttpContext.Current.Server.MapPath(@"~/Content/全国各省城市.txt");
 5             using (StreamReader sr = new StreamReader(path, System.Text.Encoding.Default))
 6             {
 7                 string s = "";
 8                 while ((s = sr.ReadLine()) != null)
 9                 {
10                     s = s.Trim();
11                     char[] str = s.ToCharArray() ;
12                     if (str[0] >= '0' && str[0] <= '9' && (str[1] == '.' || (str[1] >= '0' && str[1] <= '9' && str[2] == '.')))
13                     {
14                         int id;
15                         string name;
16                         if (str[1] == '.')
17                         {
18                             id = str[0] - '0';
19                             name = s.Substring(2, s.Length - 2);
20                         }
21                         else
22                         {
23                             id = (str[0] - '0') * 10 + str[1] - '0';
24                             name = s.Substring(3, s.Length - 3);
25                         }
26                         prolist.Add(new Province() { ID = id, Name = name });
27                         pronum++;
28                         sr.ReadLine();
29                     }
30                     else
31                     {
32                         string []ary;
33                         ary = s.Split('　');
34                         for(int i=0;i<ary.Length;i++)
35                         {
36                             string it;
37                             if (ary[i].Length == 1) { it = ary[i] + ary[i + 1]; i++; }
38                             else
39                             {
40                                 it=ary[i];
41                             }
42                             citlist.Add(new City() { ID = citnum, Name = it, ProvinceID = pronum, ZipCode = citnum.ToString().PadLeft(4, '0') });
43                             citnum++;
44                         }
45                     }
46                 }
47             }
48         }

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