progress bar for downloading a file webclient .downloadfile

Unity Engine
1

so i have a piece of my script that is set to download a file from a url and then save it to the asset folder and it works great but i want to show the progress of its download as a variable so that i can then display the progress so that you have an idea on how its going, i can not find a way to get this to work/

this is my working code

    private static void download()
    {
        WebClient client = new WebClient();
        client.DownloadFile("http://download.net/1.jpg",Application.dataPath + "/Download/image.jpg");
    }

an help would be greatly appreciated.

2

I’ve never used WebClient but if you use WWW then you can poll the progress (0…1) and use this value for a progress bar.

3

hmmmm interesting could you show me an example how this could be done with WWW with a progress bar?

4

Have you used WWW before? Do you know what a Coroutine is?

5

yes i have used it before but i am still new to c# scripting with unity, i do have a www above this that is checking a txt file on a web server for a version checking.

6 
var www = new WWW(url);
while(!www.isDone)
{
    // todo: query www.progress which will be 0..1 and use the value
    yield return null;
}
7

@andymads except this doesn’t work. Even if you run it in a Coroutine it locks the main thread and you can’t access the progress property.

8

It works fine in a coroutine.

9

I ended up using another way using WWW and IEnumerator here is my working code also for the web location of the files you need to have the setup.exe and a txt file with the version all located in the same folder.

using UnityEngine;
using System.Collections;
using UnityEngine.UI;
using System.Net;
using System.IO;

public class VCheck : MonoBehaviour {

    public int m_GameV;
    public Text m_downloadProgress;
    public int m_CheckV;
    private string m_ServerV;
    private bool m_downloadFinished = false;

    // Use this for initialization
    void Start ()
    {
        //runs check V on game start
        StartCoroutine(CheckV());
        m_downloadProgress.enabled = false;
    }
  
    // Update is called once per frame
    void Update ()
    {
        //starts setup.exe when download is finished
        if (m_downloadFinished == true)
        {
            //start update
            System.Diagnostics.Process.Start(System.Environment.ExpandEnvironmentVariables("%USERPROFILE%") + "/setup.exe");
            m_downloadFinished = false;

            Application.Quit();

            // quit in editor only used in unity editor
            #if UNITY_EDITOR
            UnityEditor.EditorApplication.isPlaying = false;
            #endif
        }
    }
    //start download update file
    private IEnumerator urlDownload ()
    {
        //creats connection to server
        WWW downloadFile = new WWW("http://DownLoadLocationOfSeup.exe.com");

        //shows download progress
        while (!downloadFile.isDone)
        {
            m_downloadProgress.enabled = true;
            m_downloadProgress.text = (string.Format("New Version Available Downloading {0:P1}", downloadFile.progress));
            yield return null;
            if (downloadFile.isDone)
            {
                m_downloadFinished = true;
                m_downloadProgress.text = ("New Version Available Downloading 100 %");
            }
        }
        //save location
        string savePath = System.Environment.ExpandEnvironmentVariables("%USERPROFILE%") + "/setup.exe";
        //write file to local disk
        byte[] bytes = downloadFile.bytes;
        File.WriteAllBytes(savePath, bytes);
    }

    //check V with server
    private IEnumerator CheckV()
    {
        WWW hs_get = new WWW("http://VersionCheck.txt");
        yield return hs_get;
        if (hs_get.error != null)
        {
            print("no internet connection" + hs_get.error);
            m_CheckV = m_GameV;
        }
        else
        {
            //if game V is less then CHeck download new v
            m_ServerV = hs_get.text;
            m_CheckV = int.Parse(m_ServerV);
            if (m_CheckV > m_GameV)
            {
                StartCoroutine(urlDownload());
            }
        }

    }
}
10 
                WebClient www = new WebClient ();
                Uri uri = new Uri (you_url);
                www.Encoding = Encoding.UTF8;
                www.DownloadProgressChanged += new DownloadProgressChangedEventHandler ((sender, data) => {
                    Debug.Log("here you can check progress");
                });
                www.DownloadDataCompleted += new DownloadDataCompletedEventHandler ((sender, data) => {
                    Debug.Log("here you can check complete");
                    www.Dispose ();
                });
                www.DownloadDataAsync (uri);
            }
11

@igor_rst How you are doing it in other thread in Unity?

12

simple bro use client.DownloadFileAsycn function