passing json string as parameter to webmethod

Question

I\'m making an ajax post to a webmethod EmailFormRequestHandler, I can see on the client side (through firebug) that status of the request is 200 but it\'s not hit

Answer 1

You're missing the content type in the jQuery JSON post:

contentType: "application/json; charset=utf-8",

See this article. It helped me greatly when I had a similar issue:

• Using jQuery to directly call ASP.NET AJAX page methods (no longer available)
• From Internet Archive: Using jQuery to directly call ASP.NET AJAX page methods

You don't need to configure the ScriptManager to EnablePageMethods.

Also, you don't need to deserialize the JSON-serialized object in your WebMethod. Let ASP.NET do that for you. Change the signature of your WebMethod to this (noticed that I appended "Email" to the words "to" and "from" because these are C# keywords and it's a bad practice to name variables or parameters that are the same as a keyword. You will need to change your JavaScript accordingly so the JSON.stringify() will serialize your string correctly:

// Expected JSON: {"toEmail":"...","fromEmail":"...","message":"..."}

[WebMethod]
public static bool EmailFormRequestHandler(string toEmail, string fromEmail, string message)
{
    // TODO: Kill this code...
    // var serializer = new JavaScriptSerializer(); //stop point set here
    // serializer.RegisterConverters(new[] { new DynamicJsonConverter() });
    // dynamic obj = serializer.Deserialize(json, typeof(object));

    try
    {
        var mailMessage = new MailMessage(
            new MailAddress(toEmail),
            new MailAddress(fromEmail)
        );
        mailMessage.Subject = "email test";
        mailMessage.Body = String.Format("email test body {0}" + message);
        mailMessage.IsBodyHtml = true;
        new SmtpClient(ConfigurationManager.AppSettings["smtpServer"]).Send(mailMessage);
        return true;
    }
    catch (Exception e)
    {
        return false;
    }
}