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c#jsonasmx

How to let an ASMX file output JSON

I created an ASMX file with a code behind file. It's working fine, but it is outputting XML.

However, I need it to output JSON. The ResponseFormat configuration doesn't seem to work. My code-behind is:

[System.Web.Script.Services.ScriptService]
public class _default : System.Web.Services.WebService {
    [WebMethod]
    [ScriptMethod(UseHttpGet = true,ResponseFormat = ResponseFormat.Json)]
    public string[] UserDetails()
    {
        return new string[] { "abc", "def" };
    }
}
Solution

  • From WebService returns XML even when ResponseFormat set to JSON:

    Make sure that the request is a POST request, not a GET. Scott Guthrie has a post explaining why.

    Though it's written specifically for jQuery, this may also be useful to you:
    Using jQuery to Consume ASP.NET JSON Web Services