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How to Resolve JavaScript Alert Not Firing in AJAX Call to ASP.NET MVC Controller?

Mary-Kate Olsen
Release: 2024-10-18 22:18:30
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How to Resolve JavaScript Alert Not Firing in AJAX Call to ASP.NET MVC Controller?

Making an Ajax Call to a Controller in ASP.NET MVC

Problem:

When attempting to retrieve data from a controller via Ajax, a JavaScript alert is not firing, despite the controller method returning the expected result.

Solution:

  1. Remove the data attribute: Since the controller method does not expect any parameters, the data attribute should be removed from the Ajax request.
  2. Use Razor and @Url.Action: Dynamically generate the URL for the Ajax request using Razor syntax and the @Url.Action helper method:
<code class="javascript">$.ajax({
    url: '@Url.Action("FirstAjax", "AjaxTest")',
    contentType: "application/json; charset=utf-8",
    dataType: "json",
    success: successFunc,
    error: errorFunc
});</code>
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Updated Code with POST Data (Optional):

If the controller method requires POST data, it can be passed through the data attribute:

<code class="javascript">$.ajax({
    type: "POST",
    url: '@Url.Action("FirstAjax", "AjaxTest")',
    contentType: "application/json; charset=utf-8",
    data: { a: "testing" },
    dataType: "json",
    success: function() { alert('Success'); },
    error: errorFunc
});</code>
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