work053
htmlpage1.html
<!DOCTYPE html><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"/><title>使用XMLHttpRequest实现异步获取服务器时间</title><script>var request = false;//创建function createXMLHttpRequest(){try{request = new ActiveXObject("Msxml2.XMLHTTP");}catch (e1){try{request = new ActiveXObject("Microsoft.XMLHTTP");}catch (e2){request = false;}}if (!request && typeof XMLHttpRequest != "undefined"){request = new XMLHttpRequest();}}function getServerTime(format){createXMLHttpRequest();var url = "WebForm1.aspx?format=" + escape(format);//通过GET方式，true为异步,false为同步request.open("GET", url, true);//回调函数request.onreadystatechange = updateTime;//null表示不再发送额外数据request.send(null);}function updateTime(){if (request.readyState == 4){document.getElementById("time").innerHTML = request.responseText;}}</script></head><body><table border="0"><tr><td>服务器时间</td><td><div id="time" style="height:100px;"></div></td></tr><tr><td><input id="Button1" type="button" value="获取完整时间" onclick="javascript: getServerTime('yyyy-mm-dd hh:mm:ss');" /><br /><br /><input id="Button2" type="button" value="获取年月日" onclick="javascript: getServerTime('yyyy-mm-dd');" /><br /><br /><input id="Button3" type="button" value="获取月份日期" onclick="javascript: getServerTime('mm-dd');" /><br /><br /><input id="Button4" type="button" value="获取时分秒" onclick="javascript: getServerTime('hh:mm:ss');" /><br /><br /></td></tr></table></body></html>
webform1.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="work053.WebForm1" %>
webform1.aspx.cs
using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;namespace work053{public partial class WebForm1 : System.Web.UI.Page{protected void Page_Load(object sender, EventArgs e){//设置服务器不缓存Response.Cache.SetCacheability(HttpCacheability.NoCache);string formatType = Request["format"];string dateFormat = string.Empty;if (!string.IsNullOrEmpty(formatType)){formatType = formatType.ToLower();switch (formatType){case "yyyy-mm-dd":dateFormat = "yyyy-MM-dd";break;case "yyyy-mm-dd hh:mm:ss":dateFormat = "yyyy-MM-dd HH:mm:ss";break;case "mm-dd":dateFormat = "MM-dd";break;case "hh:mm:ss":dateFormat = "HH:mm:ss";break;default:dateFormat = "yyyy-MM-dd HH:mm:ss";break;}}else{dateFormat = "yyyy-MM-dd HH:mm:ss";}Response.Write(DateTime.Now.ToString(dateFormat));}}}
work055
webform1.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="work055.WebForm1" %><!DOCTYPE html><html xmlns="http://www.w3.org/1999/xhtml"><head runat="server"><meta http-equiv="Content-Type" content="text/html; charset=utf-8"/><title>AJAX控件，UpdatePanel示例，实现三级联动</title></head><body><form id="form1" runat="server"><div><asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager><asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional"><ContentTemplate><asp:DropDownList ID="DropDownList1" runat="server" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged" AutoPostBack="true"><asp:ListItem>0</asp:ListItem><asp:ListItem>1</asp:ListItem><asp:ListItem>2</asp:ListItem><asp:ListItem>3</asp:ListItem><asp:ListItem>4</asp:ListItem><asp:ListItem>5</asp:ListItem><asp:ListItem>6</asp:ListItem><asp:ListItem>7</asp:ListItem><asp:ListItem>8</asp:ListItem><asp:ListItem>9</asp:ListItem></asp:DropDownList><asp:DropDownList ID="DropDownList2" runat="server" OnSelectedIndexChanged="DropDownList2_SelectedIndexChanged" AutoPostBack="true"></asp:DropDownList><asp:DropDownList ID="DropDownList3" runat="server"></asp:DropDownList></ContentTemplate><Triggers><asp:AsyncPostBackTrigger ControlID="DropDownList1" EventName="SelectedIndexChanged" /><asp:AsyncPostBackTrigger ControlID="DropDownList2" EventName="SelectedIndexChanged"/></Triggers></asp:UpdatePanel></div></form></body></html>
webform1.aspx.cs
using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;namespace work055{public partial class WebForm1 : System.Web.UI.Page{protected void Page_Load(object sender, EventArgs e){}protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e){int i = int.Parse(DropDownList1.SelectedValue);DropDownList2.Items.Clear();DropDownList3.Items.Clear();if (i != 0){for (int j = 0; j < 10; j++){DropDownList2.Items.Add(i + "" + j);}}}protected void DropDownList2_SelectedIndexChanged(object sender, EventArgs e){int j = int.Parse(DropDownList2.SelectedValue);DropDownList3.Items.Clear();for (int i = 0; i < 10; i++){DropDownList3.Items.Add(j + "" + i);}}}}
