I have been using this function I found a long time ago to do downloads - I want to modify it to pass a large JSON string to the download.aspx page. With that said I am trying to first understand it and I am confused...
And I have been calling it like this
Note that I am only passing in two parameters to this function. That means that "callback" parameter is not defined within the function.
In that $.download function there is a iframeX.Load() call that I don't understand. I looked around and the jQuery .Load method doesn't seem to take a function as a parameter - and that callback() function is not even being passed in.
What is that supposed to be doing???
Code:
$.download = function(url, data, method, callback){
var inputs = '';
var iframeX;
var downloadInterval;
if(url && data){
// remove old iframe if has
if($("#iframeX")) $("#iframeX").remove();
// creater new iframe
iframeX= $('<iframe src="[removed]false;" name="iframeX" id="iframeX"></iframe>').appendTo('body').hide();
if($.browser.msie){
downloadInterval = setInterval(function(){
// if loading then readyState is loading else readyState is interactive
if(iframeX&& iframeX[0].readyState !=="loading"){
callback();
clearInterval(downloadInterval);
}
}, 23);
} else {
iframeX.load(function(){
callback();
});
}
//split params into form inputs
var inputs = '';
jQuery.each(data.split('&'), function() {
var pair = this.split('=');
inputs += '<input type="hidden" name="' + pair[0] + '" value="' + pair[1] + '" />';
});
//create form to send request
$('<form action="'+ url +'" method="'+ (method||'post') + '" target="iframeX">'+inputs+'</form>').appendTo('body').submit().remove();
};
};Code:
function downloadrpt(rptid) {
$.download('Download.aspx', 'rptid=' + rptid + '&user=' + window.username);
}
function downloadfile(filename) {
$.download('Download.aspx', 'fn=' + filename + '&user=' + window.username);
}In that $.download function there is a iframeX.Load() call that I don't understand. I looked around and the jQuery .Load method doesn't seem to take a function as a parameter - and that callback() function is not even being passed in.
Code:
iframeX.load(function(){
callback();
});