In this article I will explain with an example, how to read QueryString parameters in jQuery.
There is no direct function or utility available to read QueryString parameter values in jQuery.
This article will illustrate how to parse the URL of the page and then extract the QueryString parameter values using JavaScript and jQuery.
Redirecting with QueryString parameters using jQuery
The following HTML Markup consists of an HTML TextBox, a DropDownList and a Button.
The Button has been assigned a jQuery Click event handler.
When the Send Button is clicked, the values of the TextBox and DropDownList are fetched and are encoded using the JavaScript encodeURIComponent function and added as QueryString parameters to a URL.
Finally, the page is redirected to the URL.
Name:
<input type="text" id="txtName" name="Name" value="Mudassar Khan" /><br />
<br />
Technology:
<select id="ddlTechnolgy" name="Technology">
<option value="ASP.Net">ASP.Net</option>
<option value="PHP">PHP</option>
<option value="JSP">JSP</option>
</select>
<input type="button" id = "btnSend" value="Send" />
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<script type="text/javascript">
$(function () {
$("#btnSend").click(function () {
var name = $("#txtName").val();
var tech = $("#ddlTechnolgy").val();
var url = "Page2.htm?name=" + encodeURIComponent(name) + "&technology=" + encodeURIComponent(tech);
window.location.href = url;
});
});
</script>
Reading QueryString parameters using jQuery
The following HTML Markup consists of an HTML SPAN.
Inside the jQuery document ready event handler, the QueryString is extracted by splitting the URL of the current page using the Question mark (?) character.
Then a loop is executed and each QueryString parameter value is extracted by further splitting using the ampersand (&) character and the extracted values are decoded using the JavaScript decodeURIComponent function inserted as Key and Value pairs into an Array.
Finally, the QueryString parameter values are fetched from the Array using the name of the QueryString parameter i.e. the Key and displayed in HTML SPAN.
<span id="lblData"></span>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<script type="text/javascript">
var queryString = new Array();
$(function () {
if (queryString.length == 0) {
if (window.location.search.split('?').length > 1) {
var params = window.location.search.split('?')[1].split('&');
for (var i = 0; i < params.length; i++) {
var key = params[i].split('=')[0];
var value = decodeURIComponent(params[i].split('=')[1]);
queryString[key] = value;
}
}
}
if (queryString["name"] != null && queryString["technology"] != null) {
var data = "<u>Values from QueryString</u><br /><br />";
data += "<b>Name:</b> " + queryString["name"] + " <b>Technology:</b> " + queryString["technology"];
$("#lblData").html(data);
}
});
</script>
Screenshot
![Read QueryString parameters in jQuery]()
Browser Compatibility
The above code has been tested in the following browsers.
![Internet Explorer]()
![FireFox]()
![Chrome]()
![Safari]()
![Opera]()
* All browser logos displayed above are property of their respective owners.
Demo
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