您的位置：首页 > 运维架构

省市之二 ------------------后台实现DropDownList联动

2009-12-21 15:54 435 查看

在网上看了很多，自己为了锻炼一下自己写了一个小的省市的二级联动。运行是可以的，请高手们多指教。

前台页面：

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="DropDownhoutai.aspx.cs" Inherits="DropDownhoutai" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >

<head runat="server">

<title>DropdownList联动</title>

</head>

<body>

<form id="form1" runat="server">

<div>

省份:<asp:DropDownList ID="ddlProvince" runat="server" OnSelectedIndexChanged="ddlProvince_SelectedIndexChanged" AutoPostBack ="true" ></asp:DropDownList>

市:<asp:DropDownList ID="ddlCity" runat="server"></asp:DropDownList>

</div>

</form>

</body>

</html>

后台页面：

using System;

using System.Data;

using System.Configuration;

using System.Collections;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

using System.Data.SqlClient;

public partial class DropDownhoutai : System.Web.UI.Page

{

static string connString = "server=localhost;database=NationalAll;uid=sa;pwd=123456;";

SqlConnection con = new SqlConnection(connString);

protected void Page_Load(object sender, EventArgs e)

{

if (!IsPostBack)

{

SqlDataAdapter sda = new SqlDataAdapter("select * from Province", con);

DataSet dt = new DataSet();

sda.Fill(dt);

ddlProvince.DataSource = dt.Tables[0].DefaultView;

ddlProvince.DataTextField = "ProName";

ddlProvince.DataValueField = "ProId";

ddlProvince.DataBind();

ddlProvince.Items.Insert(0, new ListItem("--请选择--", "0"));

ddlCity.Items.Insert(0, new ListItem("--请选择--", "0"));

}

}

protected void ddlProvince_SelectedIndexChanged(object sender, EventArgs e)

{

BindCity(int.Parse(this.ddlProvince.SelectedItem.Value));

}

protected void BindCity(int ProID)

{

SqlCommand command = new SqlCommand("select * from City where ProID=@ProID",con);

command.Parameters.Add(new SqlParameter("@ProID", ProID));

DataSet ds = new DataSet();

SqlDataAdapter da = new SqlDataAdapter(command);

da.Fill(ds);

ddlCity.DataSource = ds.Tables[0].DefaultView;

ddlCity.DataTextField = "CityName";

ddlCity.DataValueField = "CityID";

ddlCity.DataBind();

}

}

如果大家有更好的可以回帖，希望大家多给点意见。谢谢！！！！

内容来自用户分享和网络整理，不保证内容的准确性，如有侵权内容，可联系管理员处理

标签：

相关文章推荐

新的分享

章节导航