【文件属性】：
文件名称：城市的连动效果
文件大小：983B
文件格式：SLN
更新时间：2016-05-14 14:26:59
Ctiy Dropdownlist
实现城市连动
using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.SqlClient;
namespace _0327Province_City_代码实现_
{
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
string connstring = @"Data Source=.\SQLExpress;Initial Catalog=IDInfoDB;Integrated Security=True";//@表示转义字符 .\sqlexpress表示数据源
SqlConnection sconn = new SqlConnection(connstring);
string Tablename = "province";
string selectstring = "select * from " + Tablename;
SqlDataAdapter sda = new SqlDataAdapter(selectstring, sconn);
DataSet ds = new DataSet();
sconn.Open();
sda.Fill(ds, Tablename);
sconn.Close();
this.ddl_Province .DataSource = ds.Tables[Tablename].DefaultView;
this.ddl_Province .DataTextField = "province";
this.ddl_Province .DataValueField = "provinceID";
this.ddl_Province .DataBind();
}
}
protected void ddl_City_SelectedIndexChanged(object sender, EventArgs e)
{
if (this.ddl_City .SelectedIndex >= 0)
{
string connstring = @"Data Source=.\SQLExpress;Initial Catalog=IDInfoDB;Integrated Security=True";//@表示转义字符 .\sqlexpress表示数据源
SqlConnection sconn = new SqlConnection(connstring);
string Tablename = "area";
string selectstring = "select * from " + Tablename + " where cityid='" + this.ddl_City .SelectedValue + "'";
SqlDataAdapter sda = new SqlDataAdapter(selectstring, sconn);
DataSet ds = new DataSet();
sconn.Open();
sda.Fill(ds, Tablename);
sconn.Close();
this.ddl_Area .DataSource = ds.Tables[Tablename].DefaultView;
this.ddl_Area .DataTextField = "area";
this.ddl_Area .DataValueField = "areaID";
this.ddl_Area .DataBind();
}
}
protected void ddl_Province_SelectedIndexChanged(object sender, EventArgs e)
{
if (this.ddl_Province .SelectedIndex >= 0)
{
string connstring = @"Data Source=.\SQLExpress;Initial Catalog=IDInfoDB;Integrated Security=True";//@表示转义字符 .\sqlexpress表示数据源
SqlConnection sconn = new SqlConnection(connstring);
string Tablename = "city";
string selectstring = "select * from " + Tablename + " where provinceid='" + this.ddl_Province .SelectedValue + "'";
SqlDataAdapter sda = new SqlDataAdapter(selectstring, sconn);
DataSet ds = new DataSet();
sconn.Open();
sda.Fill(ds, Tablename);
sconn.Close();
this.ddl_City .DataSource = ds.Tables[Tablename].DefaultView;
this.ddl_City .DataTextField = "city";
this.ddl_City .DataValueField = "cityID";
this.ddl_City .DataBind();
}
}
}
}