Write data from Unity 3D to SQL Server using ASP.NET

Hi everyone. In this exercise we are going to pass data from UNITY 3D to an ASP.NET site. Eventually the site can connect and store data in SQL Server.

Unity 3D – Setup

1. Create a new GameObject, name it Scripts and assign with it a C# Script (LogData.cs)

Step 1

2. For testing purposes we are going to create a new button in the OnGUI() method which will pass parameters  to ASP.NET site upon click. Here is the whole implementation of the LogData class.


public class LogData : MonoBehaviour {

 //The URL to the server - In our case localhost with port number 2475
 private string url = "http://localhost:2475/";

 // Use this for initialization
 void Start () {


 // Update is called once per frame
 void Update () {


 void OnGUI()
   // Make a background box
   GUI.Box(new Rect(10,10,100,90), "Loader Menu");

   // Make the first button.
   if(GUI.Button(new Rect(20,40,80,20), "Connect")) {

     //when the button is clicked

     //setup url to the ASP.NET webpage that is going to be called
     string customUrl = url+ "LogUserScore.aspx";

     //setup a form
     WWWForm form = new WWWForm();

     //Setup the paramaters
     form.AddField("UserID", "47");
     form.AddField("Score", "100");

     //Call the server
     WWW www = new WWW(customUrl, form);


 IEnumerator WaitForRequest(WWW www)
    yield return www;

    // check for errors
    if (www.error == null)
     //write data returned from ASP.NET

    } else {
     Debug.Log("WWW Error: "+ www.error);


ASP.NET – Setup

1. Create a new ASP.NET web application and create a Web Form with name LogUserScore.aspx

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace UnityConnectASP.NET
 public partial class LogUserScore : System.Web.UI.Page
 protected void Page_Load(object sender, EventArgs e)
   if (Page.Request.HttpMethod == "POST")
      //read paramaters
      string UserID = (Request.Form["UserID"]);
      string Score = (Request.Form["Score"]);

     //store data into MS SQL Database
     //---Insert into database etc etc---

     //load total score from database
     //Using a dummy value 200
     string totalScore = "200";

     //Return data to Unity, such as total score
     Response.ContentType = "application/text; charset=utf-8";
     Response.Write("Total Score: " + totalScore);

2. Optional: To allow your game to be played from any domain, in the root folder of the site (where the web.config is located), create a crossdomain.xml file and write:

<?xml version="1.0"?>
<allow-access-from domain="*"/>

Testing the Code

1. Connect Button is clicked

Connect Unity Button

2. Data Passed to ASP.NET
Asp.net unity

3. Data returned to UNITY

ASP.NET returned data


14 thoughts on “Write data from Unity 3D to SQL Server using ASP.NET

    • The 403 Forbidden error is an HTTP status code which means that accessing the page or resource you were trying to reach is absolutely forbidden for some reason. Have you tried the crossdomain.xml file?


  1. hello admin! i am new in unity please guide me.
    i am working on a project in which i have to develop online multiplayer quiz game .
    my question is what type of DB should i use for this kind of project i.e. how to handle multiplayers and how to connect unity to db, your this post “Write data from Unity 3D to SQL Server using ASP.NET” is making sense to me except the last part “ASP.NET – Setup”. please help me if you can this is my university project.


  2. Thank you for the great help.
    But when I tried the same concept on my code It gave me 500 server error.. Could you help me figure out why and how to fix it?


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