Submitted PDF form data are empty

Question

I created a simple PDF form using Acrobat X Pro that containing one textbox ("txtName") and one button ("btnSubmit"). The button's action is set to "Submit a form" and the URL is set to an asp.net generic handler ("PdfFormHandler.ashx").
When I open the PDF in browser and fill in the textbox and click on submit button, the form submitted. But on the server side, "txtName" is always empty. There are no errors but just missing the submitted data. the server side code is:
public class PdfFormHandler : IHttpHandler
    public void ProcessRequest(HttpContext context)
        if (context.Request.RequestType == "POST")
            var name = context.Request.Form["txtName"];
            context.Response.ContentType = "text/plain";
            context.Response.Write("Hello " + name);
    public bool IsReusable
        get
            return false;
I should see "Hello " and then a name. But since it's not able to retrieve "txtName", it only prints "Hello".
i found what the problem is and i posted the answer here. http://stackoverflow.com/questions/10885969/adobe-pdf-form-submitted-but-request-form-coll ection-is-empty

Answer 1

You could try first flattenening the fields. This converts the field appearances to regular page contents. You can do this with JavaScript, PDF Optimizer, or a Preflight fixup.