Upload text to an asp.net generic handler in javascript

Question

How can I upload text written by the user to an asp.net generic handler? the text is pretty lengthy.

Answer 1

Try some jQuery code like this:

jQuery(document).ready(function($){
    $('#button-id-to-submit-info-to-the-handler').on('click', function(ev) {
        ev.preventDefault();

        //Wrap your msg in some fashion
        //in case you want to end other things
        //to your handler in the future
        var $xml = $('<root />')
            .append($('<msg />', { 
                text: escape($('#id-of-your-textarea-that-has-the-text').val()) 
            }
        ));

        $.ajax({
            type:'POST',
            url:'/path/to-your/handler.ashx',
            data: $('<nothing />').append($xml).html(),
            success: function(data) {
                $('body').prepend($('<div />', { text: $(data).find('responsetext').text() }));
            }
        });
    });
});

And in your handler:

public class YourHandler : IHttpHandler
{
   public void ProcessRequest(HttpContext ctx)
   {
       //Response with XML
       //Build a response template
       ctx.Response.ContentType = "text/xml";
       String rspBody = @"<?xml version=\""1.0\"" encoding=\""utf-8\"" standalone=\""yes\""?>
<root>
    <responsetext>{0}</responsetext>
</root>";

      //Get the xml document created via jquery
      //and load it into an XmlDocument
      XmlDocument xDoc = new XmlDocument();
      using (System.IO.StreamReader sr = new StreamReader(ctx.Request.InputStream))
      {
         String xml = sr.ReadToEnd();
         xDoc.LoadXml(xml);
      }

      //Find your <msg> node and decode the text
      XmlNode msg = xDoc.DocumentElement.SelectSingleNode("/msg");
      String msgText = HttpUtility.UrlDecode(msg.InnerXml);
      if (!String.IsNullOrEmpty(msgText))
      {
          //Success!!
          //Do whatever you plan on doing with this
          //and send a success response back
          ctx.Response.Write(String.Format(rspBody, "SUCCESS"));
      }
      else
      {
          ctx.Response.Write(String.Format(rspBody, "FAIL: msgText was Empty!"));
      }
   } 
}