WebClient下载崩溃问题

问题描述

你好，



i做了一个小的异步文件下载器。



这是代码

Hello,

i did a small async file downloader.

Here's the code

private void button5_Click(object sender, EventArgs e)
        {
downloader.DownloadFileCompleted += new System.ComponentModel.AsyncCompletedEventHandler(downloader_DownloadFileCompleted);
            downloader.DownloadProgressChanged += new System.Net.DownloadProgressChangedEventHandler(downloader_DownloadProgressChanged);
            try
            {
                label14.ResetText();
                label13.ResetText();
                progressBar1.Value = progressBar1.Minimum;

                milestones = new List<Milestone>(new[] { new Milestone { DataSize = 0, Time = DateTime.Now } });

                downloader.DownloadFileAsync(new Uri(modlink), textBox1.Text + "/download.zip");
                label17.ForeColor = Color.Red;
                label17.Text = "Status: Downloading...";
                downloading = true;
                button5.Enabled = false;
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString(), "Download Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }
        private void downloader_DownloadProgressChanged(object sender, DownloadProgressChangedEventArgs e)
        {
            milestones.Add(new Milestone { DataSize = e.BytesReceived, Time = DateTime.Now });

            //Use the last 5 intervals to calculate the download speed.
            milestones = milestones.Skip(Math.Min(0, milestones.Count - 6)).ToList();

            var firstMilestone = milestones.First();
            var lastMilestone = milestones.Last();
            var speed = (lastMilestone.DataSize - firstMilestone.DataSize) / (lastMilestone.Time - firstMilestone.Time).TotalSeconds;
            var timeRemaining = TimeSpan.FromSeconds((e.TotalBytesToReceive - e.BytesReceived) / speed);

            label14.Text = "Percentage: " + string.Format("{0}% ({1})", e.ProgressPercentage, FormatDataSpeed(speed));
            label13.Text = "Download Speed: " + string.Format("{0} of {1} ({2})", FormatDataSize(e.TotalBytesToReceive - e.BytesReceived), FormatDataSize(e.TotalBytesToReceive), FormatTime(timeRemaining));
            progressBar1.Value = e.ProgressPercentage;
        }

        private void downloader_DownloadFileCompleted(object sender, AsyncCompletedEventArgs e)
        {
            button5.Enabled = true;
            downloading = false;
            if (e.Cancelled)
            {
                label14.ResetText();
                label13.Text = "Download cancelled";
                MessageBox.Show("The download was cancelled before completion.", "Download Cancelled", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
            else if (e.Error != null)
            {
                MessageBox.Show(e.Error.ToString(), "Download Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
            else
            {
                label14.Text = "100%";
                label13.Text = "Download complete";
                unzip();
                //MessageBox.Show("The download completed successfully.", "Download Complete", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }

        }</pre>

问题是我要以超过2mb / s的速度下载。应用程序崩溃。

The problem is when im going to download with a speed more than 2mb/s. The app crash.

Description:
  A problem caused this program to stop interacting with Windows.

Problem signature:
  Problem Event Name:   AppHangB1
  Application Name: 9thapp.exe
  Application Version:  1.0.0.0
  Application Timestamp:    537a174b
  Hang Signature:   7a8c
  Hang Type:    0
  OS Version:   6.1.7601.2.1.0.400.8
  Locale ID:    1033
  Additional Hang Signature 1:  7a8c9079a614de92decd9bf2aaae0f5f
  Additional Hang Signature 2:  b046
  Additional Hang Signature 3:  b0469793c99a5b2e42c175e4de5808c9
  Additional Hang Signature 4:  7a8c
  Additional Hang Signature 5:  7a8c9079a614de92decd9bf2aaae0f5f
  Additional Hang Signature 6:  b046
  Additional Hang Signature 7:  b0469793c99a5b2e42c175e4de5808c9

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  C:\Windows\system32\en-US\erofflps.txt

谢谢





亲切



Gianmarco V.

Thanks


Cordially

Gianmarco V.

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