/// <summary>
/// 执行文件下载
/// </summary>
/// <param name="url"></param>
/// <param name="savePath"></param>
/// <param name="downloadFileHandler"></param>
public void downloadFile(string url, string savePath, DownloadFileHandler downloadFileHandler)
{
this.downloadFileHandler = downloadFileHandler;
this.url = url;
this.savePath = savePath;
try
{
// 创建目录
System.IO.Directory.CreateDirectory(Path.GetDirectoryName(savePath));
if (File.Exists(savePath))
{
File.Delete(savePath);
}
wc = new WebClient();
wc.DownloadProgressChanged += WebClientDownloadProgressChanged;
wc.DownloadDataCompleted += WebClientDownloadCompleted;
wc.DownloadDataAsync(new Uri(url));
// Sync
//byte[] bf = wc.DownloadData(new System.Uri(url));
//ByteArrayToFile(savePath, bf);
// DownloadFileAsync存在文件不释放问题
// wc.DownloadFileAsync(new System.Uri(url), savePath);
}
catch (Exception ex)
{
downloadCro.IsSuccess = false;
downloadCro.Message = ex.Message;
downloadFileHandler?.Invoke(downloadCro);
}
}
/// <summary>
/// 下载完成回调函数
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void WebClientDownloadCompleted(object sender, DownloadDataCompletedEventArgs e)
{
try
{
byte[] bf = e.Result;
ByteArrayToFile(savePath, bf);
downloadCro.IsSuccess = true;
downloadCro.Message = "Download finished!";
}
catch (Exception ex)
{
downloadCro.IsSuccess = false;
downloadCro.Message = "Download fail! " + ex.Message;
}
finally
{
downloadCro.LocalPath = savePath;
downloadFileHandler?.Invoke(downloadCro);
}
}