private void timerDownload_Tick(object sender, EventArgs e) { DownloadProgressBar.Maximum = 100; DownloadProgressBar.Minimum = 0; int iPos = videoCapture.GetDownloadProgress(); if ((iPos > DownloadProgressBar.Minimum) && (iPos < DownloadProgressBar.Maximum)) { DownloadProgressBar.Value = iPos; } if (iPos == 100) //下载完成 { videoCapture.DownloadStop(); DownloadProgressBar.Value = 0; timerDownload.Enabled = false; button4.Text = "回放下载"; MessageBox.Show("下载完成!文件已保存至" + sPlayBackFileName1 + ".mp4。"); } if (iPos == 200) //网络异常,下载失败 { MessageBox.Show("The downloading is abnormal for the abnormal network!"); timerDownload.Stop(); } }