ZipArchive 打包下载
private IActionResult DownloadZipFromUrl(string[] guids,string zipFullName)
{
using (MemoryStream zipStream = new MemoryStream())
{
using (System.Net.WebClient webClient = new System.Net.WebClient())
{
using (var archive = new ZipArchive(zipStream, ZipArchiveMode.Create, leaveOpen: true))
{
foreach (var m in guids)
{
if (string.IsNullOrWhiteSpace(m)) continue;
if (m == Guid.Empty.ToString()) continue; #region build url : https://****/upload/image?g=353e7e1b-69ae-4a60-8cfc-3737c2a64eaa&j=false
var builder = new UriBuilder()
{
Scheme = Request.Scheme,
Host = Request.Host.Host,
Path = "upload/image",
Query = "j=false&g=" + m,
};
if (Request.Host.Port != null)
{
builder.Port = Request.Host.Port.Value;
}
#endregion
webClient.DownloadDataCompleted += wc_DownloadDataCompleted;
var attachmentData = webClient.DownloadData(builder.Uri);
ZipArchiveEntry entry = archive.CreateEntry(string.IsNullOrWhiteSpace(_DownloadAttachmentFileName) ? "File1.pdf" : _DownloadAttachmentFileName, System.IO.Compression.CompressionLevel.Fastest);
using (var entryStream = entry.Open())
{
entryStream.Write(attachmentData);
}
}
}
}// disposal of archive will force data to be written to memory stream.
zipStream.Position = 0; //reset memory stream position.
return File(zipStream.ToArray(), "application/vnd.ms-excel", zipFullName);
}
}
获取文件名
private string _DownloadAttachmentFileName = string.Empty;
private void wc_DownloadDataCompleted(object sender, DownloadDataCompletedEventArgs e)
{
WebClient wc = sender as WebClient; // Try to extract the filename from the Content-Disposition header
if (!String.IsNullOrEmpty(wc.ResponseHeaders["Content-Disposition"]))
{
_DownloadAttachmentFileName = wc.ResponseHeaders["Content-Disposition"].Substring(wc.ResponseHeaders["Content-Disposition"].IndexOf("filename=") + 10).Replace("\"", ""); //FileName ok }
var data = e.Result; //File OK
}