Ajax实现无刷新三联动下拉框
更新时间：2007年04月28日 00:00:00 作者：
<HTML>
<HEAD>
<title>Ajax实现无刷新三联动下拉框</title>
<meta content="Microsoft Visual Studio .NET 7.1" name="GENERATOR">
<meta content="C#" name="CODE_LANGUAGE">
<meta content="JavaScript" name="vs_defaultClientScript">
<meta content="http://schemas.microsoft.com/intellisense/ie5" name="vs_targetSchema">
<SCRIPT language="javascript">
//城市------------------------------
function cityResult()
{
var city=document.getElementById("DropDownList1");
AjaxMethod.GetCityList(city.value,get_city_Result_CallBack);
}
function get_city_Result_CallBack(response)
{
if (response.value != null)
{
//debugger;
document.all("DropDownList2").length=0;
var ds = response.value;
if(ds != null && typeof(ds) == "object" && ds.Tables != null)
{
for(var i=0; i<ds.Tables[0].Rows.length; i++)
{
var name=ds.Tables[0].Rows[i].city;
var id=ds.Tables[0].Rows[i].cityID;
document.all("DropDownList2").options.add(new Option(name,id));
}
}
}
return
}
//市区----------------------------------------
function areaResult()
{
var area=document.getElementById("DropDownList2");
AjaxMethod.GetAreaList(area.value,get_area_Result_CallBack);
}
function get_area_Result_CallBack(response)
{
if (response.value != null)
{
document.all("DropDownList3").length=0;
var ds = response.value;
if(ds != null && typeof(ds) == "object" && ds.Tables != null)
{
for(var i=0; i<ds.Tables[0].Rows.length; i++)
{
var name=ds.Tables[0].Rows[i].area;
var id=ds.Tables[0].Rows[i].areaID;
document.all("DropDownList3").options.add(new Option(name,id));
}
}
}
return
}
function getData()
{
var province=document.getElementById("DropDownList1");
var pindex = province.selectedIndex;
var pValue = province.options[pindex].value;
var pText = province.options[pindex].text;
var city=document.getElementById("DropDownList2");
var cindex = city.selectedIndex;
var cValue = city.options[cindex].value;
var cText = city.options[cindex].text;
var area=document.getElementById("DropDownList3");
var aindex = area.selectedIndex;
var aValue = area.options[aindex].value;
var aText = area.options[aindex].text;
var txt=document.getElementById("TextBox1");
document.getElementById("<%=TextBox1.ClientID%>").innerText="省:"+pValue+"|"+pText+"市:"+cValue+"|"+cText+"区:"+aValue+"|"+aText;
}
</SCRIPT>
</HEAD>
<body ms_positioning="GridLayout">
<form id="Form1" method="post" runat="server">
<TABLE id="Table1" style="Z-INDEX: 101; LEFT: 96px; POSITION: absolute; TOP: 32px" cellSpacing="1"
cellPadding="1" width="300" border="1" bgColor="#ccff66">
<TR>
<TD>省市</TD>
<TD><asp:dropdownlist id="DropDownList1" runat="server"></asp:dropdownlist></TD>
</TR>
<TR>
<TD>城市</TD>
<TD><asp:dropdownlist id="DropDownList2" runat="server"></asp:dropdownlist></TD>
</TR>
<TR>
<TD>市区</TD>
<TD><asp:dropdownlist id="DropDownList3" runat="server"></asp:dropdownlist></TD>
</TR>
</TABLE>
<asp:TextBox id="TextBox1" style="Z-INDEX: 102; LEFT: 416px; POSITION: absolute; TOP: 48px" runat="server"
Width="424px"></asp:TextBox><INPUT style="Z-INDEX: 103; LEFT: 456px; WIDTH: 56px; POSITION: absolute; TOP: 96px; HEIGHT: 24px"
type="button" value="test" onclick="getData();">
</form>
</body>
</HTML>2.cs代码
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
namespace AjaxTest
{
/**//// <summary>
/// Summary description for WebForm1.
/// </summary>
public class WebForm1 : System.Web.UI.Page
{
protected System.Web.UI.WebControls.DropDownList DropDownList1;
protected System.Web.UI.WebControls.DropDownList DropDownList2;
protected System.Web.UI.WebControls.TextBox TextBox1;
protected System.Web.UI.WebControls.DropDownList DropDownList3;
private void Page_Load(object sender, System.EventArgs e)
{
Ajax.Utility.RegisterTypeForAjax(typeof(AjaxMethod));
if(!Page.IsPostBack)
{
this.DropDownList1.DataSource=AjaxMethod.GetProvinceList();
this.DropDownList1.DataTextField="province";
this.DropDownList1.DataValueField="provinceID";
this.DropDownList1.DataBind();
this.DropDownList1.Attributes.Add("onclick","cityResult();");
this.DropDownList2.Attributes.Add("onclick","areaResult();");
}
}
Web Form Designer generated code#region Web Form Designer generated code
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: This call is required by the ASP.NET Web Form Designer.
//
InitializeComponent();
base.OnInit(e);
}
/**//// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
}
}3.AjaxMethod
using System;
using System.Data;
using System.Data.SqlClient;
namespace AjaxTest
{
/**//// <summary>
/// Summary description for AjaxMethod.
/// </summary>
public class AjaxMethod
{
GetProvinceList#region GetProvinceList
public static DataSet GetProvinceList()
{
string sql="select * from province";
return GetDataSet(sql);
}
#endregion
GetCityList#region GetCityList
[Ajax.AjaxMethod(Ajax.HttpSessionStateRequirement.Read)]
public DataSet GetCityList(int provinceid)
{
string sql="select * from city where father="+provinceid;
return GetDataSet(sql);
}
#endregion
GetAreaList#region GetAreaList
[Ajax.AjaxMethod(Ajax.HttpSessionStateRequirement.Read)]
public DataSet GetAreaList(int cityid)
{
string sql="select * from area where father="+cityid;
return GetDataSet(sql);
}
#endregion
GetDataSet#region GetDataSet
public static DataSet GetDataSet(string sql)
{
string ConnectionString=System.Configuration.ConfigurationSettings.AppSettings["ConnectionString"];
SqlDataAdapter sda =new SqlDataAdapter(sql,ConnectionString);
DataSet ds=new DataSet();
sda.Fill(ds);
return ds;
}
#endregion
}
}4.web.config
<httpHandlers>
<add verb="POST,GET" path="ajax/*.ashx" type="Ajax.PageHandlerFactory, Ajax" />
</httpHandlers>5.ajax.dll下载/Files/singlepine/Ajax.rar
<HEAD>
<title>Ajax实现无刷新三联动下拉框</title>
<meta content="Microsoft Visual Studio .NET 7.1" name="GENERATOR">
<meta content="C#" name="CODE_LANGUAGE">
<meta content="JavaScript" name="vs_defaultClientScript">
<meta content="http://schemas.microsoft.com/intellisense/ie5" name="vs_targetSchema">
<SCRIPT language="javascript">
//城市------------------------------
function cityResult()
{
var city=document.getElementById("DropDownList1");
AjaxMethod.GetCityList(city.value,get_city_Result_CallBack);
}
function get_city_Result_CallBack(response)
{
if (response.value != null)
{
//debugger;
document.all("DropDownList2").length=0;
var ds = response.value;
if(ds != null && typeof(ds) == "object" && ds.Tables != null)
{
for(var i=0; i<ds.Tables[0].Rows.length; i++)
{
var name=ds.Tables[0].Rows[i].city;
var id=ds.Tables[0].Rows[i].cityID;
document.all("DropDownList2").options.add(new Option(name,id));
}
}
}
return
}
//市区----------------------------------------
function areaResult()
{
var area=document.getElementById("DropDownList2");
AjaxMethod.GetAreaList(area.value,get_area_Result_CallBack);
}
function get_area_Result_CallBack(response)
{
if (response.value != null)
{
document.all("DropDownList3").length=0;
var ds = response.value;
if(ds != null && typeof(ds) == "object" && ds.Tables != null)
{
for(var i=0; i<ds.Tables[0].Rows.length; i++)
{
var name=ds.Tables[0].Rows[i].area;
var id=ds.Tables[0].Rows[i].areaID;
document.all("DropDownList3").options.add(new Option(name,id));
}
}
}
return
}
function getData()
{
var province=document.getElementById("DropDownList1");
var pindex = province.selectedIndex;
var pValue = province.options[pindex].value;
var pText = province.options[pindex].text;
var city=document.getElementById("DropDownList2");
var cindex = city.selectedIndex;
var cValue = city.options[cindex].value;
var cText = city.options[cindex].text;
var area=document.getElementById("DropDownList3");
var aindex = area.selectedIndex;
var aValue = area.options[aindex].value;
var aText = area.options[aindex].text;
var txt=document.getElementById("TextBox1");
document.getElementById("<%=TextBox1.ClientID%>").innerText="省:"+pValue+"|"+pText+"市:"+cValue+"|"+cText+"区:"+aValue+"|"+aText;
}
</SCRIPT>
</HEAD>
<body ms_positioning="GridLayout">
<form id="Form1" method="post" runat="server">
<TABLE id="Table1" style="Z-INDEX: 101; LEFT: 96px; POSITION: absolute; TOP: 32px" cellSpacing="1"
cellPadding="1" width="300" border="1" bgColor="#ccff66">
<TR>
<TD>省市</TD>
<TD><asp:dropdownlist id="DropDownList1" runat="server"></asp:dropdownlist></TD>
</TR>
<TR>
<TD>城市</TD>
<TD><asp:dropdownlist id="DropDownList2" runat="server"></asp:dropdownlist></TD>
</TR>
<TR>
<TD>市区</TD>
<TD><asp:dropdownlist id="DropDownList3" runat="server"></asp:dropdownlist></TD>
</TR>
</TABLE>
<asp:TextBox id="TextBox1" style="Z-INDEX: 102; LEFT: 416px; POSITION: absolute; TOP: 48px" runat="server"
Width="424px"></asp:TextBox><INPUT style="Z-INDEX: 103; LEFT: 456px; WIDTH: 56px; POSITION: absolute; TOP: 96px; HEIGHT: 24px"
type="button" value="test" onclick="getData();">
</form>
</body>
</HTML>2.cs代码
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
namespace AjaxTest
{
/**//// <summary>
/// Summary description for WebForm1.
/// </summary>
public class WebForm1 : System.Web.UI.Page
{
protected System.Web.UI.WebControls.DropDownList DropDownList1;
protected System.Web.UI.WebControls.DropDownList DropDownList2;
protected System.Web.UI.WebControls.TextBox TextBox1;
protected System.Web.UI.WebControls.DropDownList DropDownList3;
private void Page_Load(object sender, System.EventArgs e)
{
Ajax.Utility.RegisterTypeForAjax(typeof(AjaxMethod));
if(!Page.IsPostBack)
{
this.DropDownList1.DataSource=AjaxMethod.GetProvinceList();
this.DropDownList1.DataTextField="province";
this.DropDownList1.DataValueField="provinceID";
this.DropDownList1.DataBind();
this.DropDownList1.Attributes.Add("onclick","cityResult();");
this.DropDownList2.Attributes.Add("onclick","areaResult();");
}
}
Web Form Designer generated code#region Web Form Designer generated code
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: This call is required by the ASP.NET Web Form Designer.
//
InitializeComponent();
base.OnInit(e);
}
/**//// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
}
}3.AjaxMethod
using System;
using System.Data;
using System.Data.SqlClient;
namespace AjaxTest
{
/**//// <summary>
/// Summary description for AjaxMethod.
/// </summary>
public class AjaxMethod
{
GetProvinceList#region GetProvinceList
public static DataSet GetProvinceList()
{
string sql="select * from province";
return GetDataSet(sql);
}
#endregion
GetCityList#region GetCityList
[Ajax.AjaxMethod(Ajax.HttpSessionStateRequirement.Read)]
public DataSet GetCityList(int provinceid)
{
string sql="select * from city where father="+provinceid;
return GetDataSet(sql);
}
#endregion
GetAreaList#region GetAreaList
[Ajax.AjaxMethod(Ajax.HttpSessionStateRequirement.Read)]
public DataSet GetAreaList(int cityid)
{
string sql="select * from area where father="+cityid;
return GetDataSet(sql);
}
#endregion
GetDataSet#region GetDataSet
public static DataSet GetDataSet(string sql)
{
string ConnectionString=System.Configuration.ConfigurationSettings.AppSettings["ConnectionString"];
SqlDataAdapter sda =new SqlDataAdapter(sql,ConnectionString);
DataSet ds=new DataSet();
sda.Fill(ds);
return ds;
}
#endregion
}
}4.web.config
<httpHandlers>
<add verb="POST,GET" path="ajax/*.ashx" type="Ajax.PageHandlerFactory, Ajax" />
</httpHandlers>5.ajax.dll下载/Files/singlepine/Ajax.rar
相关文章
这篇文章主要给大家介绍了如何解决AJAX请求中含有数组的问题，文中给出了详细的示例代码，相信对大家的理解和学习很有帮助，有需要的朋友们下面跟着小编一起来看看吧。2016-12-12
浏览器安全上做了限制，禁止ajax跨域获得数据，可以通过jquery提供的$.getJSON()可以跨域获得JSON格式的数据，具体的实现如下，感兴趣的朋友可以参考下哈，希望对大家有所帮助2013-06-06
这篇文章主要给大家介绍了关于利用ajax传递数组及后台接收的相关资料，文中介绍的非常详细，对大家具有一定的参考学习价值，需要的朋友们下面跟着小编一起来学习学习吧。2017-06-06
通过Ajax方式上传文件使用FormData进行Ajax请求
这篇文章主要介绍了通过Ajax方式上传文件使用FormData进行Ajax请求的相关资料,需要的朋友可以参考下2016-08-08
这篇文章主要介绍了反向Ajax 30分钟快速掌握的相关资料,需要的朋友可以参考下2016-07-07![一句话解决AJAX中文乱码问题[推荐]](//img.jbzj.com/images/xgimg/bcimg5.png)
写了个通过一般处理程序处理的AJAX小程序 结果遇到了国内程序员遇到的最多的问题：中文乱码2008-10-10
像ajax请求发生两次提交的原因是在执行完ajax请求后，并没有阻止submit的行为，下面小编给大家带来两种按钮的ajax请求时一次点击两次提交的解决方法，一起看看吧2016-09-09
下面小编就为大家带来一篇完美解决ajax访问遇到Session失效的问题。小编觉得挺不错的，现在就分享给大家，也给大家做个参考。一起跟随小编过来看看吧2016-06-06
在(ASP/PHP/JSP/html/js)中禁止ajax缓存的方法集锦
禁止ajax缓存最简单的办法就是在js端直接生成一个随机数了，但是有时会发现此方法不适用于post了，如果我们要禁止post 提交数据的ajax缓存需要怎么处理呢，下面我整理了很多关于禁止ajax缓存的例子2014-08-08
ajax是异步的意思，它有别于传统web开发中采用的同步的方式。异步传输是面向字符的传输，它的单位是字符；而同步传输是面向比特的传输，它的单位是桢，它传输的时候要求接受方和发送方的时钟是保持一致的2013-08-08
![一句话解决AJAX中文乱码问题[推荐]](http://img.jbzj.com/images/xgimg/bcimg5.png)
最新评论