Response.Redirect giving HttpException exception

Question

I am working on creating web application and i am getting problem redirecting to another page,if I use redirect code in another method then it works fine but i want to use redirect code from my running thread and it is throwing me HttpExeption.Please can you take a look at this code and show right way to use redirect code in my runloop() method.Thanks in advance.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.Services;
using System.Net.Sockets;
using System.IO;
using System.Threading;
using System.Net;
using System.Text;
using System.Web.Script.Serialization;
using System.Threading.Tasks;

public partial class _Default : System.Web.UI.Page
{
static TcpListener listener;
static TcpClient client;
public StreamReader STR;
public StreamWriter STW;
public String receive = "kkkk";
public String text_to_send;
string Jsn;
string URI ;
string myParameters;
string URL1;

Thread backgroundThread2;
Thread backgroundThread;
int i, n = 0, k = 0, len = 0, len2 = 0;
public int readflag = 0, writeflag = 0, pre1 = 0, pre2 = 0, pre3 = 0, nopre = 0;
char[] ch = new char[100];
char[] ch1 = new char[100];
char[] ch2 = new char[100];
String test = null, s1, s2, s3;
String test1 = null;
string frame;
const int LIMIT = 5; //5 concurrent clients
protected void Page_Load(object sender, EventArgs e)
{
     frame = Request.QueryString["frame"];
    if (Request.QueryString["Frame"] != null)
        Response.Write("From Page1 param1 value=" + Request.QueryString["frame"]);

}
public void Button1_Click(object sender, EventArgs e) //start server
{
    listener = new TcpListener(IPAddress.Any, 8002);
    listener.Start();

    client = listener.AcceptTcpClient();
    STR = new StreamReader(client.GetStream());
    STW = new StreamWriter(client.GetStream());
    STW.AutoFlush = true;


    backgroundThread = new Thread(new ThreadStart(RunLoop));
    backgroundThread.Start();
  //  Task.Delay(50000);
    //redirect1();

  //  Response.Redirect(URL1);

}

public void Button2_Click(object sender, EventArgs e) //Redirect server
{
    Jsn = "25";
    string URI = "Otherpage.aspx?";
    string myParameters = "jasonop="+ Jsn;
    string URL1 = URI + myParameters;

        Response.Redirect(URL1);

  //  Response.Redirect("Otherpage.aspx?jasonop=25");
 //   System.Diagnostics.Process.Start("http://localhost:85/shaktijason/1.php?jasonop=25");
}
public class Person
{
    public string Name { get; set; }
}
public void RunLoop()       //receive
{
    NetworkStream stream = client.GetStream();
    Byte[] bytes = new Byte[256];
    String data = null;
    int i,k=1;
    string str = "";
    JavaScriptSerializer js = new JavaScriptSerializer();
    // Loop to receive all the data sent by the client.
    while ((i = stream.Read(bytes, 0, bytes.Length)) != 0)
    {
        // Translate data bytes to a ASCII string.
        data = System.Text.Encoding.ASCII.GetString(bytes, 0, i);
        byte[] bHex = Encoding.ASCII.GetBytes(data);
        // TextBox1.Text = data;
        string json = "[{Name:'01030008000105C8'}]";


        Person[] persons = js.Deserialize<Person[]>(json);
        string name = persons[0].Name.ToString();
        // STW.WriteLine("01030008000105C8")
        STW.WriteLine(name);
        string result = decodedata(data);
        str = result;
        k++;
        if (k == 4) { break; }

    }
    //   string returnJson = "[{Freq:'" + str + "'}]";
    Jsn = GetDeviceJSON(str);
     URI = "Otherpage.aspx?";
     myParameters = "jasonop="+Jsn;
     URL1 = URI + myParameters;

    Response.Redirect(URL1,false); 
  //  Response.Redirect("Otherpage.aspx");
    //string URI = "http://localhost:85/Shaktijason/1.php";
    //string myParameters = "jasonop=jsn";
    //using (WebClient wc = new WebClient())
    //{
    //    wc.Headers[HttpRequestHeader.ContentType] = "application/x-www-form-urlencoded";
    //    string HtmlResult = wc.UploadString(URI, myParameters);
    //    Response.Redirect(HtmlResult);
    //}
    //string JSON = Json;


    //backgroundThread2.Start();
    //  backgroundThread.Abort();
    //return js.Serialize(returnJson);

}
public string decodedata(string data)
{
    ch1 = data.ToCharArray();
    ch2 = data.ToCharArray();
    int len1 = data.Count(char.IsLetter);
    len2 = data.Count(char.IsNumber);
    int add = len1 + len2;
    while (ch1[k] != 'k')
    {
        ch2[k] = ch1[k];
        k++;
    }
    string strng = new string(ch2, 0, k);
    len = strng.Length;

    string sub = data.Substring(k + 1);
    len2 = sub.Length;
    k = 0;
    if (len == 1)
    {
        strng = "0" + strng.PadLeft(len, '0');
    }
    if (len2 == 1)
    {
        sub = "0" + sub.PadLeft(len2, '0');
    }
    char[] go = new char[20];
    string final = strng + sub;
    if (final.Equals("00b8"))
    {
        final = "0";
    }
    Decimal intAgain = long.Parse(final, System.Globalization.NumberStyles.HexNumber);


    intAgain = intAgain / 100;
    string final3 = intAgain.ToString();

    //  string final2 = new string(go);

    return final3;
}
[WebMethod]
public static string GetValues(string values)
{
    return values;
}
public string GetDeviceJSON(String str)
{
    Device[] emps = new Device[] {
    new Device()
    {
        Freq=str
    }
    //new employee()
    //{
    //    id=102,
    //    name="dinesh",
    //    salary=100000
    //}
    };
    return new JavaScriptSerializer().Serialize(emps);
  }

}

Answer 1

You are trying to access the Reponse object from a background thread, where the response is already long gone.

You are not allowed to access the Response object, or any other object under HttpContext after the page has stopped rendering. Use web sockets or AJAX calls to create asynchronous requests and responses.