Iframe实现无刷新联动
iframe的无刷新其实是局部刷新，状态栏的滚动条还是会滚动，只是页面不会闪烁，这是一种比较老的技术了，在处理的数据两大的时候会比较慢，在本例中需要两个页面：oec2003index.aspx和oec2003frame.asapx,oec2003index.aspx用来显示界面，其中有一个iframe标记，指向oec2003frame.aspx页用来显示结果
oec2003index.aspx前台代码
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="oec2003Index.aspx.cs" Inherits="_Default" %><!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 id="Head1" runat="server"> <title>无标题页</title> <script type="text/javascript"> function Query() { var ddlpro = document.getElementById('ddlPro'); var pro = ddlpro.options[ddlpro.selectedIndex].innerText; if (pro != "") { document.getElementById("iframe1").src = "oec2003frame.aspx?Pro=" + pro; } } </script></head><body> <form id="form2" runat="server"> <div> <table border="1" cellpadding="3" cellspacing="0" width="600px"> <tr> <td colspan="2" align="center"> Iframe实现局部刷新 </td> </tr> <tr> <td> 省份名称: </td> <td> <select id="ddlPro" > <option value="湖北">湖北</option> <option value="河北">河北</option> <option value="广东">广东</option> <option value="河南">河南</option> </select> <input id="Button1" type="button" value="查询" onclick="Query()" /> </td> </tr> <tr> <td> 显示城市列表 </td> <td> <iframe src="oec2003frame.aspx" id="iframe1" width="100%" height="100%" frameborder="0" scrolling="no" /> </td> </tr> </table> </div> </form></body></html>oec2003frame.aspx的前台代码：
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="oec2003frame.aspx.cs" Inherits="myframe" %><!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 id="Head1" runat="server"> <title>无标题页</title></head><body> <form id="form2" runat="server"> <div> <asp:DropDownList ID="ddlCity" runat="server" Width="179px"> </asp:DropDownList> </div> </form></body></html>
oec2003frame.aspx后台代码：
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;public partial class myframe : System.Web.UI.Page{ protected void Page_Load(object sender, EventArgs e) { string pro = Request.QueryString["pro"]; switch (pro) { case "湖北": this.ddlCity.Items.Clear(); this.ddlCity.Items.Add("武汉"); this.ddlCity.Items.Add("黄冈"); this.ddlCity.Items.Add("黄石"); this.ddlCity.Items.Add("襄樊"); break; case "河北": this.ddlCity.Items.Clear(); this.ddlCity.Items.Add("石家庄"); this.ddlCity.Items.Add("唐山"); this.ddlCity.Items.Add("承德"); this.ddlCity.Items.Add("邯郸"); break; case "广东": this.ddlCity.Items.Clear(); this.ddlCity.Items.Add("广州"); this.ddlCity.Items.Add("佛山"); this.ddlCity.Items.Add("深圳"); this.ddlCity.Items.Add("珠海"); break; case "河南": this.ddlCity.Items.Clear(); this.ddlCity.Items.Add("郑州"); this.ddlCity.Items.Add("新乡"); this.ddlCity.Items.Add("安阳"); this.ddlCity.Items.Add("信阳"); break; } }}Javascript无刷新联动
前台页面代码：
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="oec2003index.aspx.cs" Inherits="jacascript_Default" %><!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 id="Head1" runat="server"> <title>无标题页</title> <script type="text/javascript"> function FillData(strcity) { document.getElementById("ddlCity").options.length = 0; var indexofcity; var city; while (strcity.length > 0) { indexofcity = strcity.indexOf(","); if (indexofcity > 0) { city = strcity.substring(0, indexofcity); strcity = strcity.substring(indexofcity + 1); document.getElementById("ddlCity").add(new Option(city, city)); } else { document.getElementById("ddlCity").add(new Option(strcity, strcity)); break; } } } </script></head><body> <form id="form2" runat="server"> <div> <table width="700px" border="1" cellpadding="5" cellspacing="0"> <tr> <td colspan="2" align="center"> 脚本方法实现刷新 </td> </tr> <tr> <td> 选择省份: </td> <td> <select id="ddlPro" > <option value="湖北">湖北</option> <option value="河北">河北</option> <option value="广东">广东</option> <option value="河南">河南</option> </select> <input id="btnQuery" type="button" value=" 查询" onclick="City()" /> </td> </tr> <tr> <td> 城市: </td> <td> <asp:DropDownList ID="ddlCity" runat="server" Width="201px"> </asp:DropDownList> </td> </tr> </table> </div> </form></body></html>后台代码：
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.Text;public partial class jacascript_Default : System.Web.UI.Page{ protected void Page_Load(object sender, EventArgs e) { StringBuilder myscript = new StringBuilder(); myscript.Append("function City() {\n"); myscript.Append("var ddlpro=document.getElementById('ddlPro');\n"); myscript.Append("var pro=ddlpro.options[ddlpro.selectedIndex].innerText;\n"); //myscript.Append("var pro=document.getElementById('txtPro').value;\n"); myscript.Append("switch(pro) { \n"); myscript.Append("case '湖北':\n"); myscript.Append("FillData('" + GetCityStr("湖北") + "');\n"); myscript.Append("break;\n"); myscript.Append("case '河北':\n"); myscript.Append("FillData('" + GetCityStr("河北") + "');\n"); myscript.Append("break;\n"); myscript.Append("case '广东':\n"); myscript.Append("FillData('" + GetCityStr("广东") + "');\n"); myscript.Append("break;\n"); myscript.Append("case '河南':\n"); myscript.Append("FillData('" + GetCityStr("河南") + "');\n"); myscript.Append("break;}\n"); myscript.Append("}\n"); Page.ClientScript.RegisterClientScriptBlock(typeof(string), "city", myscript.ToString(), true); } private string GetCityStr(string pro) { string city = ""; switch (pro) { case "湖北": city = "武汉,黄冈,黄石,襄樊"; break; case "河北": city = "石家庄,唐山,承德,邯郸"; break; case "广东": city = "广州,佛山,深圳,珠海"; break; case "河南": city = "郑州,新乡,安阳,信阳"; break; } return city; }}CallBack无刷新联动
前台代码：
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="oec2003index.aspx.cs"Inherits="callback_Default" %><!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 id="Head1" runat="server"> <title>无标题页</title> <script type="text/javascript"> function FillData() { var ddlpro=document.getElementById('ddlPro'); var pro=ddlpro.options[ddlpro.selectedIndex].value; <% =ClientScript.GetCallbackEventReference(this,"pro","FillDll",null) %> } function FillDll(strcity) { document.getElementById("ddlCity").options.length=0; var indexofcity; var city; while(strcity.length>0) { indexofcity=strcity.indexOf(","); if(indexofcity>0) { city=strcity.substring(0,indexofcity); strcity=strcity.substring(indexofcity+1); document.getElementById("ddlCity").add(new Option(city,city)); } else { document.getElementById("ddlCity").add(new Option(strcity,strcity)); break; } } } </script></head><body> <form id="form2" runat="server"> <div> <table width="700px" border="1" cellpadding="5" cellspacing="0"> <tr> <td colspan="2" align="center"> callback方法实现刷新 </td> </tr> <tr> <td> 选择省份: </td> <td> <select id="ddlPro" > <option value="湖北">湖北</option> <option value="河北">河北</option> <option value="广东">广东</option> <option value="河南">河南</option> </select> <input id="btnQuery" type="button" value=" 查询" onclick="FillData()" /> </td> </tr> <tr> <td> 城市: </td> <td> <asp:DropDownList ID="ddlCity" runat="server" Width="201px"> </asp:DropDownList> </td> </tr> </table> </div> </form></body></html>后台代码：
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; public partial class callback_Default : System.Web.UI.Page,ICallbackEventHandler{ private string _data; protected void Page_Load(object sender, EventArgs e) { } //ICallbackEventHandler 成员}Ajax无刷新联动
该例子也要用到两个页面：oec203index.aspx和oec2003datapage.aspx. oec2003datapage.aspx主要用来回送要显示的数据
oec2003.aspx页面前台代码：
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="oec2003index.aspx.cs"Inherits="ajax_Default" %><!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 id="Head1" runat="server"> <title>无标题页</title> <script type="text/javascript"> var xmlhttp; function getData() { var ddlpro = document.getElementById("ddlPro"); var pro = ddlpro.options[ddlpro.selectedIndex].innerText; xmlhttp = new ActiveXObject("Microsoft.XMLHTTP"); xmlhttp.onreadystatechange = statechange; xmlhttp.Open("GET", "oec2003datapage.aspx?pro=" + pro, true); xmlhttp.Send(); } function statechange() { if (xmlhttp.readystate == 4) { if (xmlhttp.status == 200) { FillData(xmlhttp.responseText); } } } function FillData(strcity) { document.getElementById("ddlCity").options.length = 0; var indexofcity; var city; while (strcity.length > 0) { indexofcity = strcity.indexOf(","); if (indexofcity > 0) { city = strcity.substring(0, indexofcity); strcity = strcity.substring(indexofcity + 1); document.getElementById("ddlCity").add(new Option(city, city)); } else { document.getElementById("ddlCity").add(new Option(strcity, strcity)); break; } } } </script></head><body> <form id="form1" runat="server"> <div> <table width="700px" border="1" cellpadding="5" cellspacing="0"> <tr> <td colspan="2" align="center"> ajax方法实现刷新 </td> </tr> <tr> <td> 选择省份: </td> <td> <select id="ddlPro" > <option value="湖北">湖北</option> <option value="河北">河北</option> <option value="广东">广东</option> <option value="河南">河南</option> </select> <input id="btnQuery" type="button" value=" 查询" onclick="getData()" /> </td> </tr> <tr> <td> 城市: </td> <td> <asp:DropDownList ID="ddlCity" runat="server" Width="201px"> </asp:DropDownList> </td> </tr> </table> </div> </form></body></html>oec2003datapage.aspx后台代码：
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;public partial class ajax_datapage : System.Web.UI.Page{ protected void Page_Load(object sender, EventArgs e) { string pro = Request.QueryString["pro"]; Response.Clear(); switch (pro) { case "湖北": Response.Write("武汉,黄冈,黄石,襄樊"); break; case "河北": Response.Write("石家庄,唐山,承德,邯郸"); break; case "广东": Response.Write("广州,佛山,深圳,珠海"); break; case "河南": Response.Write("郑州,新乡,安阳,信阳"); break; } }}