jquery的Ajax返回值怎么取？
<!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>
<title></title>
<script src="jquery-1.8.0.min.js" type="text/javascript"></script>
<script type="text/javascript">
var test = {
getValue: function (key) {
if (key == '1') {
return 'A';
} else {
return 'B';
}
},
getAjaxValue: function (key) {
$.ajax({
type: "post", async: false, cache: false, dataType: "text",
url: '../../Handler/JavaScriptSession.ashx',
data: [
{ name: "action", value: "read" },
{ name: "name", value: key },
{ name: "value", value: "" }
],
success: function (result) {
if (result != "error" || result != "true") {
alert("内部"+result);//这值能得到，并成功alert出
return "返回值"+result;
}
},
error: function () {
alert("错误");
}
});
}
}
</script>
</head>
<body>
<div >
<a onclick="alert(test.getValue('1'));">测试1</a>
<br />
<a onclick="alert(test.getAjaxValue('1'));">测试2</a>
</div>
</body>
</html>
为什么，测试1 我能得到return的值，测试2我确无法得到？Ajax的async我已经设置为false了呀？
[解决办法]
var test = {
getValue : function(key) {
if (key == '1') {
return 'A';
} else {
return 'B';
}
},
getAjaxValue : function(key) {
var _result;
$.ajax({
type : "post",
async : false,
cache : false,
dataType : "text",
url : 'index.php',
data : {},
success : function(result) {
if (result != "error"
[解决办法]
result != "true") {
alert("内部" + result);//这值能得到，并成功alert出
_result = "返回值" + result;
}
},
error : function() {
alert("错误");
}
});
return _result;
}
}
[解决办法]
回调函数中return 没什么意义，而且test.getAjaxValue这个方法没有返回值。改成下面的
var test = {
getValue: function (key) {
if (key == '1') {
return 'A';
} else {
return 'B';
}
},
getAjaxValue: function (key) {
var s = false; ////////
$.ajax({
type: "post", async: false, cache: false, dataType: "text",
url: '../../Handler/JavaScriptSession.ashx',
data: [
{ name: "action", value: "read" },
{ name: "name", value: key },
{ name: "value", value: "" }
],
success: function (result) {
if (result != "error"
[解决办法]
result != "true") {
alert("内部" + result); //这值能得到，并成功alert出
s = "返回值" + result; ///////////
}
},
error: function () {
alert("错误");
}
});
return s;//////
}
}