CODEWITHSUNDEEP
javascriptjqueryasp.net
jitendragarg
jitendragarg

Reputation: 957

Calling jquery alert using ScriptManager in Asp.net

I have a single line code that displays JS alert right now. I am trying to replace it with the jQuery alert so that I can theme it. Below is the code that I wrote for jQuery alert:

ScriptManager.RegisterStartupScript(this, GetType(), "onload", 
   "window.onload = function () {jAlert('This is a custom alert box', 'Alert Dialog');}", true);

This code used to be like this:

ScriptManager.RegisterStartupScript(this, GetType(), "showalert", 
    "alert('This is a custom alert box');", true);

The existing code works fine. But my code gives me an error saying,

value of property jalert is null

I am unsure, what I am missing here.

Upvotes: 0

Views: 419

Answers (1)

bastos.sergio
bastos.sergio

Reputation: 6764

You're running an external plugin to JQuery.

Make sure that on your page you have valid references to the jquery library and jalert plugin.

The $.browser property is considered obsolete and should not be used anymore. This is because there are a lot of browsers that misidentify about whom they are. IE12, for instance, identifies itself as a Mozilla browser.

You can find more information about the $.browser property here.

If your version is JQuery 1.8 and under use this:

<!-- Dependencies -->
<script src="jquery.js" type="text/javascript"></script>

<!-- Core files -->
<script src="jquery.alerts.js" type="text/javascript"></script>
<link href="jquery.alerts.css" rel="stylesheet" type="text/css" media="screen" />

If your version is JQuery 1.9 and over, you'll need to reference the jquery-migrate.js file so that you can use the $.browser property:

<!-- Dependencies -->
<script src="jquery.js" type="text/javascript"></script>
<script src="jquery-migrate.js" type="text/javascript"></script>

<!-- Core files -->
<script src="jquery.alerts.js" type="text/javascript"></script>
<link href="jquery.alerts.css" rel="stylesheet" type="text/css" media="screen" />

Upvotes: 1

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