jQuery.get(url,[data],[callback])
通过远程 HTTP GET 请求载入信息。
这是一个简单的 GET 请求功能以取代复杂 $.ajax 。请求成功时可调用回调函数。如果需要在出错时执行函数,请使用 $.ajax。
Load a remote page using an HTTP GET request.
This is an easy way to send a simple GET request to a server without having to use the more complex $.ajax function. It allows a single callback function to be specified that will be executed when the request is complete (and only if the response has a successful response code). If you need to have both error and success callbacks, you may want to use $.ajax.
返回值
XMLHttpRequest
参数
url (String) : 待载入页面的URL地址
data (Map) : (可选) 待发送 Key/value 参数。
callback (Function) : (可选) 载入成功时回调函数。
示例
请求 test.php 网页,忽略返回值。
jQuery 代码:
$.get("test.php");
var url = "../config/chkAjax.ashx?action=chkUserName&userName=" + document.getElementById("editUserName").value;
$.get(url, function (data) {
if (data != "OK") {
alert(data);
document.getElementById("editUserName").focus();
return false;
}
});
请求 test.php 网页,传送2个参数,忽略返回值。
jQuery 代码:
$.get("test.php", { name: "John", time: "2pm" } );
显示 test.php 返回值(HTML 或 XML,取决于返回值)。
jQuery 代码:
$.get("test.php", function(data){
alert("Data Loaded: " + data);
});
alert("Data Loaded: " + data);
});
显示 test.cgi 返回值(HTML 或 XML,取决于返回值),添加一组请求参数。
jQuery 代码:
$.get("test.cgi", { name: "John", time: "2pm" },
function(data){
alert("Data Loaded: " + data);
});
function(data){
alert("Data Loaded: " + data);
});
JS实现通用效果
var xmlhttp;
function getReturn(Url) //提交为aspx,aspx页面路径, 返回页面的值
{
if(typeof XMLHttpRequest != "undefined")
{
xmlhttp = new XMLHttpRequest();
}
else if(window.ActiveXObject)
{
var versions = ["MSXML2.XMLHttp.5.0","MSXML2.XMLHttp.4.0","MSXML2.XMLHttp.3.0","MSXML2.XMLHttp","Microsoft.XMLHttp"];
for(var i = 0 ; i < versions.length; i++)
{
try
{
xmlhttp = new ActiveXObject(versions[i]);
break;
}
catch(E)
{
}
}
}
try
{
xmlhttp.open('GET',Url,false);
xmlhttp.setRequestHeader('Content-Type','application/x-www-form-urlencoded')
xmlhttp.send(null);
if((xmlhttp.readyState == 4)&&(xmlhttp.status == 200))
{
return xmlhttp.responseText;
}
else
{
return null;
}
}
catch (e)
{
alert("你的浏览器不支持XMLHttpRequest对象, 请升级");
}
return null;
}
function getReturn(Url) //提交为aspx,aspx页面路径, 返回页面的值
{
if(typeof XMLHttpRequest != "undefined")
{
xmlhttp = new XMLHttpRequest();
}
else if(window.ActiveXObject)
{
var versions = ["MSXML2.XMLHttp.5.0","MSXML2.XMLHttp.4.0","MSXML2.XMLHttp.3.0","MSXML2.XMLHttp","Microsoft.XMLHttp"];
for(var i = 0 ; i < versions.length; i++)
{
try
{
xmlhttp = new ActiveXObject(versions[i]);
break;
}
catch(E)
{
}
}
}
try
{
xmlhttp.open('GET',Url,false);
xmlhttp.setRequestHeader('Content-Type','application/x-www-form-urlencoded')
xmlhttp.send(null);
if((xmlhttp.readyState == 4)&&(xmlhttp.status == 200))
{
return xmlhttp.responseText;
}
else
{
return null;
}
}
catch (e)
{
alert("你的浏览器不支持XMLHttpRequest对象, 请升级");
}
return null;
}
调用:
result = getReturn('ajaxupgrade.aspx?op=unzip');
if (result != "") {
document.getElementById("unzip" + i).src = "../Img/state1.gif";
} else {
document.getElementById("unzip" + i).src = "../Img/state2.gif";
if (result != "") {
document.getElementById("unzip" + i).src = "../Img/state1.gif";
} else {
document.getElementById("unzip" + i).src = "../Img/state2.gif";
}