完整的地区查询代码

 1 private void lbProv_Loaded(object sender, RoutedEventArgs e)
 2         {
 3             List<Area> Prov = new List<Area>();
 4             DataTable table = SqlHelper.ExecuteDataTable("select * from AreaFull where AreaPid=0");
 5             foreach (DataRow row in table.Rows)
 6             {
 7                 Area prov = new Area();
 8                 prov.areaId = (int)row["AreaId"];
 9                 prov.areaName=(string)row["AreaName"];
10                 Prov.Add(prov);
11             }
12 
13             lbProv.ItemsSource = Prov;//前台xaml里要设置DisplayMemberPath="areaName"
14         }
15        
16         private void lbProv_SelectionChanged(object sender, SelectionChangedEventArgs e)
17         {
18             List<Area> City = new List<Area>();
19             Area p=(Area)lbProv.SelectedItem;
20             DataTable table = SqlHelper.ExecuteDataTable("select * from AreaFull where AreaPid=@Id",
21                 new SqlParameter("@Id", Convert.ToInt32(p.areaId)));
22             foreach (DataRow row in table.Rows)
23             {
24                 Area city = new Area();
25                 city.areaId = (int)row["AreaId"];
26                 city.areaName = (string)row["AreaName"];
27                 City.Add(city);
28             }
29             lbCity.ItemsSource = City;
30         }
31 
32         private void lbCity_SelectionChanged(object sender, SelectionChangedEventArgs e)
33         {
34             List<Area> Area = new List<Area>();
35             if (lbCity.SelectedItem != null)//注意这个判断
36             {
37                 Area a = (Area)lbCity.SelectedItem;
38                 DataTable table = SqlHelper.ExecuteDataTable("select * from AreaFull where AreaPid=@Id",
39                     new SqlParameter("@Id", Convert.ToInt32(a.areaId)));
40                 foreach (DataRow row in table.Rows)
41                 {
42                     Area city = new Area();
43                     city.areaId = (int)row["AreaId"];
44                     city.areaName = (string)row["AreaName"];
45                     Area.Add(city);
46                 }
47                 lbArea.ItemsSource = Area;
48             }
49             
50         }
posted on 2013-03-23 04:25 蘑菇蘑菇它不开花阅读(154) 评论(0) 编辑收藏举报