Getting Ajax variable after success parameter - ajax

Question

Here's my Ajax code:
$("#generateImage").click(function () {
var url = $(this).data('url');
var currentUrl =window.location.href;
$.ajax({
type: "post",
contentType: "application/json; charset=utf-8",
url: url,
data: "{'urlVar':'"+ currentUrl +"','mywidth':'250','myheight':'480'}",
success: function (response) {
if (response != null && response.success) {
alert("Success");
window.location = '#Url.Action("GetData", "MyController", new { urlVar = currentUrl })';
} else {
alert("Failed");
}
},
});
In this part of code:
new { urlVar = currentUrl })';
currentUrl says:
Does not exist in the current context;
My Question is:
How to make currentUrl to be valid on that particular location?
Otherwise there's no error on data: part? data: "{'urlVar':'"+ currentUrl

Answer 1

The problem is currentUrl defined as client-side variable in this line:
var currentUrl = window.location.href;
Note that #Url.Action() helper is executed server-side, you cannot use currentUrl client-side variable inside it as action parameter (it doesn't exist as server-side variable). You need to use query string like this to redirect into GetData action method:
if (response != null && response.success) {
alert("Success");
// use query string here
window.location = '#Url.Action("GetData", "MyController")?urlVar=' + currentUrl;
}
If you want to get URL from server-side, modify your Url.Action helper to include either Request.Url, Request.RawUrl or Request.Url.AbsoluteUri:
// alternative 1
window.location = '#Url.Action("GetData", "MyController", new { urlVar = Request.Url.AbsoluteUri })';
// alternative 2
window.location = '#Url.Action("GetData", "MyController", new { urlVar = Request.Url.ToString() })';
Update:
For multiple parameters, you can utilize either query string parameters:
window.location = '#Url.Action("GetData", "MyController")?urlVar=' + currentUrl + '&width=' + varwidthvalue + '&height=' + varheightvalue;
Or if both varwidthvalue and varheightvalue are server-side variables, just use this one:
window.location = '#Url.Action("GetData", "MyController", new { urlVar = Request.Url.ToString(), width = varwidthvalue, height = varheightvalue })';