压缩文件的使用

首先引入dll文件ICSharpCode.SharpZipLib.dll 管理NuGet包里面下载

压缩文件

/// <summary>
/// 压缩文件
/// </summary>
/// <param name="fileName">要压缩的所有文件（完全路径)</param>
/// <param name="fileName">文件名称</param>
/// <param name="name">压缩后文件路径</param>
/// <param name="Level">压缩级别</param>
public void ZipFileMain(string[] filenames, string[] fileName, string name, int Level)
{
    ZipOutputStream s = new ZipOutputStream(File.Create(name));
    Crc32 crc = new Crc32();
    //压缩级别
    s.SetLevel(Level); // 0 - store only to 9 - means best compression
    try
    {
        int m = 0;
        foreach (string file in filenames)
        {
            //打开压缩文件
            FileStream fs = File.OpenRead(file);//文件地址
            byte[] buffer = new byte[fs.Length];
            fs.Read(buffer, 0, buffer.Length);
            //建立压缩实体
            ZipEntry entry = new ZipEntry(fileName[m].ToString());//原文件名
            //时间
            entry.DateTime = DateTime.Now;
            //空间大小
            entry.Size = fs.Length;
            fs.Close();
            crc.Reset();
            crc.Update(buffer);
            entry.Crc = crc.Value;
            s.PutNextEntry(entry);
            s.Write(buffer, 0, buffer.Length);
            m++;
        }
    }
    catch
    {
        throw;
    }
    finally
    {
        s.Finish();
        s.Close();
    }
}

文件下载

//下载打包文件
    private void DownloadFile(string fileName, string filePath)
    {
        FileInfo fileInfo = new FileInfo(filePath);
        Response.Clear();
        Response.ClearContent();
        Response.ClearHeaders();
        Response.AddHeader("Content-Disposition", "attachment;filename=" + fileName);
        Response.AddHeader("Content-Length", fileInfo.Length.ToString());
        Response.AddHeader("Content-Transfer-Encoding", "binary");
        Response.ContentType = "application/octet-stream";
        Response.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312");
        Response.WriteFile(fileInfo.FullName);
        Response.Flush();
        File.Delete(filePath);//删除已下载文件
        Response.End();
    }

具体使用

protected void BtnDownloadFiles_Click(object sender, EventArgs e)
    {
        List<string> listFJ = new List<string>();//保存附件路径
        List<string> listFJName = new List<string>();//保存附件名字
        for (int i = 0; i < gridView.Rows.Count; i++)
        {
            HtmlInputCheckBox chk = (Page.Master.FindControl("ContentPlaceHolder1").FindControl("gridView") as GridView).Rows[i].FindControl("checkboxname") as HtmlInputCheckBox;
            if (chk != null && chk.Checked)
            {
                string temp = gridView.Rows[i].Cells[14].Text.ToString().Trim();
                if (temp != " ")
                {
                    listFJ.Add(Server.MapPath("~") + temp);
                    listFJName.Add(temp);
                }
            }
        }
        string time = DateTime.Now.Ticks.ToString();
        ZipFileMain(listFJ.ToArray(), listFJName.ToArray(), Server.MapPath("~/uploadfiles/" + time + ".zip"), 9);//压缩文件
        DownloadFile(Server.UrlEncode("附件.zip"), Server.MapPath("~/uploadfiles/" + time + ".zip"));//下载文件
    }