怎么实现省，市，县三级无刷新联动Dropdownlist

[ljd7202138]

我的表脚本是
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[行政区划]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)
drop table [dbo].[行政区划]
GO

CREATE TABLE [dbo].[行政区划] (
[ID] [int] IDENTITY (1, 1) NOT NULL ,
[代码] [int] NULL ,
[省] [varchar] (255) COLLATE Chinese_PRC_CI_AS NULL ,
[市] [varchar] (255) COLLATE Chinese_PRC_CI_AS NULL ,
[县] [varchar] (255) COLLATE Chinese_PRC_CI_AS NULL ,
[邮政编码] [varchar] (53) COLLATE Chinese_PRC_CI_AS NULL ,
[区号] [varchar] (53) COLLATE Chinese_PRC_CI_AS NULL
) ON [PRIMARY]
GO

[北京的雾霾天]

有必要说明是WinForm还是Asp.Net?

[sugar8049]

winform则无悬念
asp.net就结合ajax吧

[ljd7202138]

是webform

[magicbacon]

Ajax，呵呵，没用过啊。

[magicbacon]

嗯，顺便学一下吧。

[wangwang008]

没有代码啊！

[ACLOUD178]

用AJAX
主要代码
Partial Class DropDownLink
Inherits System.Web.UI.Page

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Ajax.Utility.RegisterTypeForAjax(GetType(DropDownLink)) 'JS里的要跟这里的一样 DropDownLink
If Not Page.IsPostBack Then
con()
DataBd()
End If
End Sub
<Ajax.AjaxMethod()> _
Public Function GetNextClass(ByVal cid As Integer) As DataSet
Try
Return getDs("select id,cname from WebClass where parentid=" & cid)
Catch ex As Exception
Throw ex
End Try
End Function
'HttpContext.Current.Server.MapPath("./" & ConfigurationManager.AppSettings("db"))
Public Function con() As OleDbConnection
Dim connString As String
Dim conn As OleDbConnection
connString = ConfigurationManager.AppSettings("db")
' J:\aspxweb\ajax研究\ajaxvb\db.mdb"
conn = New OleDbConnection(connString)
Return conn
End Function
太多了 你自己下载代码吧 C#和VB的
http://www.vr178.com/asboy/index.html#ajax