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jQuery .ajax() returning empty response with ASP.NET Web API 2 due to JSON serialization issues

๐Ÿ‘€ Views: 455 ๐Ÿ’ฌ Answers: 1 ๐Ÿ“… Created: 2025-06-12
jquery ajax asp.net web-api json javascript

I'm relatively new to this, so bear with me. I'm working with an scenario where my jQuery `.ajax()` call to an ASP.NET Web API 2 endpoint is returning an empty response. The API is designed to return a JSON object, but the response body is just an empty string, and I'm getting a status code 200. I've checked the network tab in Chrome DevTools, and I can see the request going through successfully, but the response is not as expected. Hereโ€™s the relevant jQuery code Iโ€™m using: ```javascript $.ajax({ url: 'https://myapi.example.com/api/data', type: 'GET', contentType: 'application/json', dataType: 'json', success: function(data) { console.log('Response:', data); }, behavior: function(xhr, status, behavior) { console.behavior('behavior:', behavior); } }); ``` On the server side, my API action looks like this: ```csharp [HttpGet] public IHttpActionResult GetData() { var data = new { message = "Hello, World!" }; return Ok(data); } ``` I've verified that the action is being hit by placing a breakpoint in the controller, and it seems that the object is being created correctly. However, when the response is serialized, it results in an empty body. I suspect it may have something to do with JSON serialization settings or attributes, but Iโ€™m not sure where to look. Iโ€™ve tried adding `return Json(data, JsonRequestBehavior.AllowGet);`, but that leads to a different behavior regarding HTTP methods. I've also looked into configuring JSON serialization in `Startup.cs`, but Iโ€™m not clear on what changes to make there. Any insights on what could be causing this scenario or how to properly configure the response serialization would be greatly appreciated! What am I doing wrong? My development environment is Linux. I'd really appreciate any guidance on this.