facebook registration plug-in Async Validation

Question

I am trying to impliment facebook registration pluging from last three weeks, to check the username avaiablity I am using jquery and JSON, accourding to this http://develop

Answer 1

FB registration page should look like as follows

Note how I mentioned server file name (it is without full URL, as both files were on same root dir) in validate_async(form, cb) function

        $.getJSON('test02.aspx?username=' + form.username,

Test02.aspx page should look like as follows

Note no html, body or head tags in test02.aspx (Test02.aspx.cs) should look like

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Newtonsoft.Json;
using System.Text;

public partial class test02 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e1)
    {
        StringBuilder JSON = new StringBuilder();

        //validate from your database and execute one of the following two lines.

       JSON.Append("{\"error\":\"Exist\"}"); // username is taken

     //  JSON.Append("{\"anything\":\"Not Exist\"}");


        Response.Write(JSON.ToString());

        Response.End(); 

    }
}