AJAX响应问题 [英] Problem with AJAX Response
问题描述
嗨...
我需要处理更多的AJAX内容，所以我想使用带有URL(对Ping的url)，要发送的参数，ctype(内容类型XML，JSON或TEXT)之类的参数的JS函数.我需要的只是当我使用这些参数调用该函数时，该函数应返回XML或JSON对象...但是，在
之外，Obj是无法访问的
http.onreadystatechange = function()
{
if(http.readyState == 4&&http.status == 200)
{
obj = http.responseXML;
}
}
我需要在http.onreadystatechange = function()之外的位置访问"obj"，以便可以将其返回给被调用的函数...
现在我在哪里失踪...还是有其他替代方法可以做到这一点...
Hi ...
I Need to work with more AJAX Content, So i want a JS Function with Arguments like URL(the url to Ping), Parameters to Send , ctype(Content Type XML,JSON or TEXT). All i need is when i Call the Function with these Arguments , the Function should return the XML or JSON object back... But the Obj is inaccesible outside the
http.onreadystatechange =function()
{
if(http.readyState == 4 && http.status == 200)
{
obj=http.responseXML;
}
}
i need to access ''obj'' here outside the http.onreadystatechange =function(), SO that i can return it to the Called Function ...
Now where am i Missing ... or is there any Alternative ways to do this ...
var url="getxml.php";
var paramstring="abc=20&def=2";
var ctype="XML";
// URL - URL of PHP, paramstring - Parameters to Send , Ctype-ContentType (Strictly XML,JSON,or TEXT)
var xmlobj = GetTHTTPObject(url,paramstring,ctype);
alert(xmlobj); // I need to get the obj returned by the AJAX here ...
function GetTHTTPObject(url,paramstring,ctype)
{
var http = GetXmlHttpRequestObject(); //new XMLHttpRequest();
var params = paramstring;
// var obj;
http.open("POST", url, true);
http.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
http.setRequestHeader("Content-length", params.length);
http.setRequestHeader("Connection", "close");
// if(http.readyState == 4 && http.status == 200)
// alert(http.responseXML);
data=http.onreadystatechange =function() //Call a function when the state changes.
{
if(http.readyState == 4 && http.status == 200)
{
obj=http.responseXML;
}
alert(obj);
return obj;
}
http.send(params);
alert(obj); // How to get the ''obj'' accessible here ?
return obj;
}
我该如何解决...
Manikanda raj S
How can i Solve this ...
Manikanda raj S
推荐答案
http.send(params ); alert(obj); //如何在此处访问"obj"?返回"obj"；
http.send(params); alert(obj); // How to get the ''obj'' accessible here ? return "obj";
最后一行.您正在重播名为"obj"的字符串.删除它.我相信这不是必需的.
Last line in this. You are returing a string named ''obj''. Remove this. It''s not required i believe.
alert(obj); //如何在此处访问"obj"?
alert(obj); // How to get the ''obj'' accessible here ?
为什么要在那里访问?直到除非在readystatechanged方法中未取回已发送的请求，否则您在其中将没有期望的值.
Why you want to access that there? Until unless the sent request is not retrieved back in the readystatechanged method, you wont be having expected value in it.
我需要在http.onreadystatechange = function()之外访问"obj"，以便我可以返回它到被调用的函数...
i need to access ''obj'' here outside the http.onreadystatechange =function(), SO that i can return it to the Called Function ...
全局定义一个变量.说``objResult''.
现在，在您的readystatechanged方法中，将值分配给此全局变量.无需设置返回值.
那应该就是全部.
Define a variable globally. Say ''objResult''.
Now, in your readystatechanged method, assign the value to this global variable. No need to set return value.
That should be all.
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