图片或文件打包批量下载

using Cmm2.Partner.MyLib; using ICSharpCode.SharpZipLib.Zip; using System; using System.Collections.Generic; using System.Data.SqlClient; using System.IO; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; namespace Cmm2.Partner.client.app { public partial class down : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { string Id = Request.QueryString["filename"]; DbHelperSQL dbhelp = new DbHelperSQL(); List<string> list = new List<string>(); SqlDataReader res= dbhelp.ExecuteReader("SELECT ImgUrl FROM dbo.CarImage WHERE InId=" + Id); SqlDataReader carnumber = dbhelp.ExecuteReader("SELECT CarNumber FROM dbo.InsurancePolicy WHERE id=" + Id); var carnumbers= ""; while (carnumber.Read()) { carnumbers = carnumber["CarNumber"].ToString(); } carnumbers = carnumbers + ".zip"; while (res.Read()) { list.Add(res["ImgUrl"].ToString()); } res.Close(); Dictionary<string, Stream> streams = new Dictionary<string, Stream>(); Stream streamWriter = null; //string filepaths = Request.QueryString["filename"]; //string[] arrStr = filepaths.Split('|');//按分号截取 for (int i = 0; i < list.Count(); i++) { string strNames = list[i].Substring(list[i].LastIndexOf("//") + 1); string filePaths = Server.MapPath("~" + strNames);//路径 streamWriter = File.Open(filePaths, FileMode.Open); string strName = strNames.Substring(strNames.LastIndexOf("/") + 1);//获取文件名 streams.Add(strName, streamWriter); } MemoryStream ms = new MemoryStream(); ms = PackageManyZip(streams); byte[] bytes = new byte[(int)ms.Length]; ms.Read(bytes, 0, bytes.Length); ms.Close(); Response.ContentType = "application/octet-stream"; //通知浏览器下载文件而不是打开 Response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode(carnumbers, System.Text.Encoding.UTF8)); Response.BinaryWrite(bytes); Response.Flush(); } static MemoryStream PackageManyZip(Dictionary<string, Stream> streams) { byte[] buffer = new byte[6500]; MemoryStream returnStream = new MemoryStream(); var zipMs = new MemoryStream(); using (ZipOutputStream zipStream = new ZipOutputStream(zipMs)) { zipStream.SetLevel(9); foreach (var kv in streams) { string fileName = kv.Key; using (var streamInput = kv.Value) { zipStream.PutNextEntry(new ZipEntry(fileName)); while (true) { var readCount = streamInput.Read(buffer, 0, buffer.Length); if (readCount > 0) { zipStream.Write(buffer, 0, readCount); } else { break; } } zipStream.Flush(); } } zipStream.Finish(); zipMs.Position = 0; zipMs.CopyTo(returnStream, 5600); } returnStream.Position = 0; return returnStream; } } }