Why Does My jQuery Ajax Request Fire the Error Event Despite a 200 OK Status Code?

Handling 200 OK Errors in Ajax Requests

In Ajax requests, receiving a 200 OK status code should typically execute the success event. However, in some cases, jQuery may instead fire the error event.

Understanding the Issue

When executing Ajax requests, jQuery attempts to convert the response body based on the specified dataType parameter. If the conversion fails due to invalid data, jQuery triggers the error callback.

Solution

In the provided code, jQuery expects a JSON response due to the dataType: "json" parameter. However, the server-side C# code returns an HTML snippet instead.

To resolve this issue, remove the dataType parameter from the jQuery code. Alternatively, the server-side code can be modified to return a valid JSON response, such as:

private void test()
{
    var data = new
    {
        message = "Record Deleted"
    };
    var json = JsonConvert.SerializeObject(data);
    Response.Write(json);
}

This will ensure that jQuery can correctly parse the response as JSON and execute the success event.

The above is the detailed content of Why Does My jQuery Ajax Request Fire the Error Event Despite a 200 OK Status Code?. For more information, please follow other related articles on the PHP Chinese website!