using ICSharpCode.SharpZipLib.Zip; using Qianchen.Application.Base.SystemModule; using Qianchen.Application.OA.File.FilePreview; using Qianchen.Util; using System.Collections.Generic; using System.IO; using System.Web; using System.Web.Mvc; namespace Qianchen.Application.Web.Areas.LR_SystemModule.Controllers { /// <summary> /// 版 本 v7.0.6 开发框架 /// Copyright (c) 2013-2020 QC /// 创建人:框架开发组 /// 日 期:2017.03.08 /// 描 述:附件管理 /// </summary> public class AnnexesController : MvcControllerBase { // 省略部分代码 /// <summary> /// 下载文件 /// </summary> /// <param name="idsJson">文件id</param> /// <returns></returns> [HttpPost] [ValidateAntiForgeryToken] public void DownAnnexesFileZip(string id) { List<FileEntity> fileList = new List<FileEntity>(); IEnumerable<AnnexesFileEntity> list = annexesFileIBLL.GetList(id); //int count = 0; Dictionary<string, int> dict = new Dictionary<string, int>(); foreach (var entity in list) { if (System.IO.File.Exists(entity.F_FilePath)) { int count = 0; if (dict.ContainsKey(entity.F_FileName)) { if (dict.TryGetValue(entity.F_FileName, out count)) { count++; dict.Remove(entity.F_FileName); dict.Add(entity.F_FileName, count); // 处理重名文件,避免打包失败 entity.F_FileName = "(" + count + ")" + entity.F_FileName; } } else { dict.Add(entity.F_FileName, 0); } fileList.Add(new FileEntity(entity.F_FileName, entity.F_FilePath)); } } DownLoadoldAll(fileList); } #endregion #region 私有方法 /// <summary> /// 打包下载 /// </summary> /// <param name="FileName">文件虚拟路径</param> /// /// <param name="name">返回客户端名称</param> private void DownLoadoldAll(List<FileEntity> fileList) { Dictionary<string, Stream> streams = new Dictionary<string, Stream>(); Stream streamWriter = null; foreach (var entity in fileList) { //将所有文件流在循环中加进,根据自己情况来写 streamWriter = System.IO.File.Open(entity.FilePath, FileMode.Open); streams.Add(entity.FileName, streamWriter); } //下面可以直接复制粘贴 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("打包文档.zip", System.Text.Encoding.UTF8)); Response.BinaryWrite(bytes); Response.Flush(); } /// <summary> /// 将多个流进行zip压缩,返回压缩后的流 /// </summary> /// <param name="streams">key:文件名;value:文件名对应的要压缩的流</param> /// <returns>压缩后的流</returns> private 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; } #endregion } public class FileEntity { public FileEntity() { } public FileEntity(string FileName, string FilePath) { this.FileName = FileName; this.FilePath = FilePath; } /// <summary> /// 文件名称 /// </summary> /// <returns></returns> public string FileName { get; set; } /// <summary> /// 文件路径 /// </summary> /// <returns></returns> public string FilePath { get; set; } } }