Asynchronous Download total progress

Question

Well, I created a downloader that checks all files in a list and then it downloads all files.

Example:

Node Class:

public class Node
{
    public string fileName { get; set; }
    public string fileHash { get; set; }
    public int fileSize    { get; set; }

    public Node(string fName, string fHash, int fSize)
    {
        fileName = fName;
        fileHash = fHash;
        fileSize = fSize;
    }
}

public class Nodes : List<Node>
{
    public void Fill(string name, string hash, int size)
    {
        Add(new Node(name, hash, size));
    }
}

itemsUpdate:

List<Node> itemsUpdate = new List<Node>();

Downloading the files:

FileDownload Class

FileDownload fDownload;
foreach (Node n in itemsUpdate)
{
    //fDownload contains all for the async download.
    fDownload.Download(url, n.fileName);
    //Here I show the current progress
    while (fDownload.Progress != 100)
    {
        lblProgress.Text = fDownload.Progress.ToString() + "%";
    }
    lblProgress.Text = "100%";
}

What I want to know is how to calculate the total progress of the download. Hope someone could help me. Thanks

RyanWang · Answer 1 · 2014-01-03T15:19:49.687

1

first calculate sum of all file size, then calculate total progress each time

long sum = 0;
foreach(Node n in itemsUpdate)
{
    sum += n.fileSize;
}

long nodeSum = 0;
foreach (Node n in itemsUpdate)
{
    //fDownload contains all for the async download.
    fDownload.Download(url, n.fileName);
    //Here I show the current progress
    while (fDownload.Progress != 100)
    {
        lblProgress.Text = ((nodeSum + fDownload.Progress * n.fileSize)/sum).ToString() + "%";
    }
    nodeSum += n.fileSize;
}

edited Jan 03 '14 at 15:19

answered Jan 03 '14 at 12:47

RyanWang

178
9

It starts working and then sets lblProgress to 0% once it finishes to download one of the files in the list. Hope you can help me to finish this. Thanks for being helping me :). – Derezzed Jan 03 '14 at 14:15

score 0 · Answer 2 · edited May 23 '17 at 12:03

0

You have to loop over all the files queue in order to acquire their total size, and there is a discussion about how it is made.
Then, in download callbacks progress must be checked not only relatively to current file size, but relatively to all files sizes sum

edited May 23 '17 at 12:03

Community

1
1

answered Jan 03 '14 at 12:41

Ilya Tereschuk

1,204
1
9
21

Asynchronous Download total progress

2 Answers2