UpdatePanel里边放了Repeater 和Timer 怎么实现刷新啊
UpdatePanel里边放了Repeater 和Timer 怎么实现局部刷新啊
<asp:ScriptManager ID="ScriptManager1" runat="server" EnablePartialRendering="true"></asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:Timer ID="MyTimer" runat="server" Interval="30000" OnTick="MyTimer_Tick"></asp:Timer>
<asp:Repeater ID="RptGoods" runat=server>
<HeaderTemplate>
基本结构是这样 现在可以刷新 但不能局部刷新 把整个页面都刷新了 我已经设计了
EnablePartialRendering="true">
UpdateMode="Conditional">
为什么还是 整个页面被刷新了
[解决办法]
UpdatePanel
好像有个Triger属性
另外如果只有一个Timer的话不用设置那个属性
[解决办法]
这里拿个LABLE做实验
- C# code
<div> <asp:ScriptManager ID="ScriptManager1" runat="server"> </asp:ScriptManager> <asp:UpdatePanel ID="UpdatePanel1" runat="server"> <ContentTemplate> <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label> <asp:Timer ID="Timer1" runat="server" Interval="1000" ontick="Timer1_Tick"> </asp:Timer> </ContentTemplate> </asp:UpdatePanel> </div>using System;using System.Collections.Generic;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;public partial class Default5 : System.Web.UI.Page{ protected void Page_Load(object sender, EventArgs e) { } protected void Timer1_Tick(object sender, EventArgs e) { this.Label1.Text = System.DateTime.Now.ToString(); }}
[解决办法]
定时刷新一般用js的setInterval
html标签定时刷新页面
<meta http-equiv="refresh" content="10">
<meta http-equiv="Refresh" content="60;URL=/要刷新的页面URL地址">
其中content的值是刷新页面时间间隔,单位秒
用javascript定时刷新页面
<script type="text/javascript">
setInterval("window.location.reload()",5000);
//或者
//setTimeout("window.location.reload()",5000);
</script>
自动刷新也是可以控制的...
javascript控制启动和停止自动刷新
var refresh = setTimeout("window.location.reload()", 2000);
<input type=button value=停止刷新 onclick="clearTimeout(refresh)"><br>
<input type=button value=继续刷新 onclick="refresh=setTimeout('window.location.reload()', 2000)">
[解决办法]
首先在ASP.Net创建两个WebForm页，分别命名为Default1，Default2。下面给出代码清单：
//Default1.aspx
<%@ Page Language="C#" Debug="true" AutoEventWireup="true" CodeFile="Default1.aspx.cs" Inherits="Default1" %>
<!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>无标题页</title>
<script type="text/Javascript">
var XmlHttp;
function createXmlHttpRequest()
{
if (window.XmlHttpRequest)
{
XmlHttp = new XmlHttpRequest();
}
else if (window.ActiveXObject)
{
try
{
XmlHttp = new ActiveXObject("MsXml2.XmlHTTP");
}
catch (e1)
{
try
{
XmlHttp = new ActiveXObject("Microsoft.XmlHTTP");
}
catch (e2)
{}
}
}
return XmlHttp;
}
function doStart() {
createXmlHttpRequest();
var url = "Default2.aspx?task=reset";
XmlHttp.open("POST", url, true);
XmlHttp.onreadystatechange = startCallback;
XmlHttp.send(null);
}
function startCallback() {
if (XmlHttp.readyState == 4) {
if (XmlHttp.status == 200) {
setTimeout("pollServer()", 1000);
refreshTime();
}
else {
alert("HTTP error: "+XmlHttp.status);
}
}
}
function pollServer() {
createXmlHttpRequest();
var url = "Default2.aspx?task=foo";
XmlHttp.open("POST", url, true);
XmlHttp.onreadystatechange = pollCallback;
XmlHttp.send(null);
}
function refreshTime(){
var time_span = document.getElementById("time");
var time_val = time_span.innerHTML;
var int_val = parseInt(time_val);
var new_int_val = int_val - 1;
if (new_int_val > -1) {
setTimeout("refreshTime()", 1000);
time_span.innerHTML = new_int_val;
} else {
time_span.innerHTML = 1;
}
}
function pollCallback() {
if (XmlHttp.readyState == 4) {
if (XmlHttp.status == 200) {
var message = XmlHttp.responseXml.getElementsByTagName("message")[0].firstChild.data;
if (message != "done") {
var new_row = createRow(message);
var table = document.getElementById("dynamicUpdateArea");
var table_body = table.getElementsByTagName("tbody").item(0);
var first_row = table_body.getElementsByTagName("tr").item(1);
table_body.insertBefore(new_row, first_row);
setTimeout("pollServer()", 1000);
refreshTime();
}
}
else {
alert("HTTP error: "+XmlHttp.status);
}
}
}
function createRow(message) {
var row = document.createElement("tr");
var cell = document.createElement("td");
var cell_data = document.createTextNode(message);
cell.appendChild(cell_data);
row.appendChild(cell);
return row;
}
</script>
</head>
<body>
<form id="form1" runat="server" >
<h1>AJAX Dynamic Update Example</h1>
This page will automatically update itself:
<input type="button" value="Launch" id="go" onclick="doStart();"/>
<p/>
Page will refresh in <span id="time">1</span> seconds.
<p/>
<table id="dynamicUpdateArea" align="left">
<tbody>
<tr id="row0"><td></td></tr>
</tbody>
</table>
</form>
</body>
</html>
//Default2.cs
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 Default2: System.Web.UI.Page
{
private static int counter = 1;
protected void Page_Load(object sender, EventArgs e)
{
String res = "";
String task = this.Request.Params["task"];
String message = "";
if (!string.IsNullOrEmpty(task))
{
if (task.Equals("reset"))
{
counter = 1;
}
else
{
switch (counter)
{
case 1: message = "Steve walks on stage"; break;
case 2: message = "iPods rock"; break;
case 3: message = "Steve says Macs rule"; break;
case 4: message = "Change is coming"; break;
case 5: message = "Yes, OS X runs on Intel - has for years"; break;
case 6: message = "Macs will soon have Intel chips"; break;
case 7: message = "done"; break;
}
counter++;
}
res = "<message>" + message + "</message>";
Response.ContentType = "text/Xml";
Response.AppendHeader("Cache-Control", "no-cache");
Response.Write("<response>");
Response.Write(res);
Response.Write("</response>");
Response.End();
}
}
}
[解决办法]
[解决办法]
我以前在csdn上写过一个demo，你可以测试一下是否局部刷新。代码如下：
- HTML code
<%@ Page Language="C#" %><script runat="server"> protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { this.Calendar1.Style["position"] = "absolute"; this.TextBox1.DataBind(); } } protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e) { this.DropDownList2.Items.Clear(); switch (this.DropDownList1.SelectedValue) { case "北京": this.DropDownList2.Items.Add("天安门广场"); this.DropDownList2.Items.Add("颐和园"); this.DropDownList2.Items.Add("雍和宫"); this.DropDownList2.Items.Add("红螺寺"); break; case "上海": this.DropDownList2.Items.Add("崇明岛"); this.DropDownList2.Items.Add("外滩"); this.DropDownList2.Items.Add("万佛阁"); break; case "香港": this.DropDownList2.Items.Add("海洋公园"); this.DropDownList2.Items.Add("半岛酒店"); break; } } protected void DropDownList2_SelectedIndexChanged(object sender, EventArgs e) { ShowResult(); } protected void Button1_Click(object sender, EventArgs e) { try { this.Calendar1.SelectedDate = DateTime.Parse(this.TextBox1.Text); } catch { } this.Calendar1.Visible = true; } protected void Calendar1_SelectionChanged(object sender, EventArgs e) { this.TextBox1.Text = this.Calendar1.SelectedDate.ToShortDateString(); this.Calendar1.Visible = false; ShowResult(); } void ShowResult() { this.Label1.Text = "您选择" + this.TextBox1.Text + "去" + this.DropDownList2.SelectedValue; UpdatePanel3.Update(); }</script><!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>在开发ajax应用初期应该使用基本的asp.net ajax功能</title></head><body> <form id="form1" runat="server"> <asp:ScriptManager ID="ScriptManager1" runat="server" /> <asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional"> <ContentTemplate> <asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="True" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged"> <asp:ListItem>北京</asp:ListItem> <asp:ListItem>上海</asp:ListItem> <asp:ListItem>香港</asp:ListItem> </asp:DropDownList> <asp:DropDownList ID="DropDownList2" runat="server" AutoPostBack="True" OnSelectedIndexChanged="DropDownList2_SelectedIndexChanged" /> </ContentTemplate> </asp:UpdatePanel> <br /> <table border="0" cellpadding="0" cellspacing="0"> <tr> <td> 请输入日期： </td> <td> <asp:UpdatePanel ID="UpdatePanel2" runat="server" UpdateMode="Conditional"> <ContentTemplate> <table cellpadding="0" cellspacing="0"> <tr> <td> <asp:TextBox ID="TextBox1" runat="server" Width="147px" Text="<%# DateTime.Now.AddDays(20).ToShortDateString() %>" /> <asp:Button ID="Button1" runat="server" Text="..." OnClick="Button1_Click" /> </td> </tr> <tr> <td> <asp:Calendar ID="Calendar1" runat="server" Visible="False" OnSelectionChanged="Calendar1_SelectionChanged" BackColor="#FFFFCC" BorderColor="#FFCC66" BorderWidth="1px" DayNameFormat="Shortest" Font-Names="Verdana" Font-Size="8pt" ForeColor="#663399" Height="200px" ShowGridLines="True" Width="220px">