ICode9

精准搜索请尝试: 精确搜索
首页 > 编程语言> 文章详细

c# 创建文件夹、压缩成zip格式并下载

2021-07-30 09:31:07  阅读:184  来源: 互联网

标签:文件 string zip c# 压缩成 文件夹 File Response carcode


接到一个需求,需要将图片及其他数据信息存储到txt文件下并根据上传时间分别打包到文件夹内。

需要打包的数据:Img1,img2,updatetime,carcode,address

分析:首先,创建一级文件夹:firstFile,创建二级文件夹:secondFile.

           其次,将carcode,address数据存储到txt文本内

           第三,将txt文本和img1、img2分别存储到secondFile文件夹

           第四,压缩文件并下载

           第五,删除压缩包及创建的文件夹

代码:

 

创建一级文件夹FirstFile
 
public string FirstCreate(string dt)
        {
            string path = @System.AppDomain.CurrentDomain.BaseDirectory + @"Download/记录_" + dt;
            if (!Directory.Exists(path))
            {
                Directory.CreateDirectory(path);
            }
            return path;
        }
创建二级文件夹 secondFile

public string SecondCreate(string path,string vdt, string CarNo)
        {
            string dt = DateTime.Now.ToString("yyyyMMddHHmmss");
            vdt = DateTime.Parse(vdt).ToString("yyyyMMddHHmmss");
            string filname = path + "\\" + vdt + "_" + CarNo;
            if (!Directory.Exists(filname))
            {
                Directory.CreateDirectory(filname);
            }
            return filname;
        }

 

将数据存入到txt文件中

        public bool txtData(string path, string bianhao, string carcode, string carcolor, string cartype, string codecolor, string violationtime, string violationaddr, string x, string y)
        {
            string filename = path + "\\" + carcode + ".txt";//这是地址
            string Text = "编号:" + bianhao + "\r\n" +"车辆牌号:" + carcode + "\r\n" +"地点:" + violationaddr ;
            FileStream fs = new FileStream(filename, FileMode.Create);
            StreamWriter sw = new StreamWriter(fs, Encoding.Unicode);
            sw.Write(Text);
            sw.Close();
            fs.Close();
            return true;
        }
图片在数据库中存储的未URL,所以需要根据图片地址下载图片到本地磁盘

/// <summary> /// 从图片地址下载图片到本地磁盘 /// </summary> /// <param name="ToLocalPath">图片本地磁盘地址</param> /// <param name="Url">图片网址</param> /// <returns></returns> public bool SavePhotoFromUrl(string FileName, string Url) { bool Value = false; WebResponse response = null; Stream stream = null; try { HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url); response = request.GetResponse(); stream = response.GetResponseStream(); if (!response.ContentType.ToLower().StartsWith("text/")) { Value = SaveBinaryFile(response, FileName); } //stream.Close(); } catch (Exception err) { string aa = err.ToString(); } return Value; } /// <summary> /// Save a binary file to disk. /// </summary> /// <param name="response">The response used to save the file</param> // 将二进制文件保存到磁盘 private static bool SaveBinaryFile(WebResponse response, string FileName) { bool Value = true; byte[] buffer = new byte[1024]; try { //if (File.Exists(FileName)) // File.Delete(FileName); //Stream outStream = System.IO.File.Create(FileName+"\\"+ carcode+".jpg"); Stream outStream = System.IO.File.Create(FileName); Stream inStream = response.GetResponseStream(); int l; do { l = inStream.Read(buffer, 0, buffer.Length); if (l > 0) outStream.Write(buffer, 0, l); } while (l > 0); //outStream.Flush(); outStream.Close(); //inStream.Flush(); inStream.Close(); } catch { Value = false; } return Value; }

  

压缩文件
此处需要引用:

using ICSharpCode.SharpZipLib.Zip;
using ICSharpCode.SharpZipLib.Checksums;


/// <summary>
        /// 压缩文件
        /// </summary>
        /// <param name="sourceFilePath">待拷贝文件或文件夹 绝对路径</param>
        /// <param name="destinationZipFilePath"> 生成zip文件的绝对路径 </param>
        public void CreateZip(string sourceFilePath, string destinationZipFilePath)
        {
            if (sourceFilePath[sourceFilePath.Length - 1] != Path.DirectorySeparatorChar)
                sourceFilePath += Path.DirectorySeparatorChar;
            ZipOutputStream zipStream = new ZipOutputStream(File.Create(destinationZipFilePath));
            zipStream.SetLevel(6);  // 压缩级别 0-9
            CreateZipFiles(sourceFilePath, zipStream, sourceFilePath);

            zipStream.Finish();
            zipStream.Close();
        }

        /// <summary>
        /// 递归压缩文件
        /// </summary>
        /// <param name="sourceFilePath">待压缩的文件或文件夹路径</param>
        /// <param name="zipStream">打包结果的zip文件路径(类似 D:\WorkSpace\a.zip),全路径包括文件名和.zip扩展名</param>
        /// <param name="staticFile"></param>
        public void CreateZipFiles(string sourceFilePath, ZipOutputStream zipStream, string staticFile)
        {
            if (sourceFilePath[sourceFilePath.Length - 1] != Path.DirectorySeparatorChar)
                sourceFilePath += Path.DirectorySeparatorChar;
            Crc32 crc = new Crc32();
            string[] filesArray = Directory.GetFileSystemEntries(sourceFilePath);
            foreach (string file in filesArray)
            {
                if (Directory.Exists(file))                     //如果当前是文件夹,递归
                {
                    CreateZipFiles(file, zipStream, staticFile);
                }
                else//如果是文件,开始压缩
                {
                    FileStream fileStream = File.OpenRead(file);

                    byte[] buffer = new byte[fileStream.Length];
                    fileStream.Read(buffer, 0, buffer.Length);
                    string tempFile = file.Substring(staticFile.LastIndexOf("\\") + 1);
                    ZipEntry entry = new ZipEntry(tempFile);

                    entry.DateTime = DateTime.Now;
                    entry.Size = fileStream.Length;
                    fileStream.Close();
                    crc.Reset();
                    crc.Update(buffer);
                    entry.Crc = crc.Value;
                    zipStream.PutNextEntry(entry);

                    zipStream.Write(buffer, 0, buffer.Length);
                    //zipStream.Flush();
                    //zipStream.Close();

                }
            }
        }

  

下载文件(在控制器中写)

public void OutPutZipFile(HttpContext context, string fileName)
        {
            //客户端保存的文件名 
            string zipname = fileName;
            //目标文件路径
            string filePath = Server.MapPath("~/Download/" + fileName + "");
            //Console.WriteLine(filePath);
            FileInfo fileInfo = new FileInfo(filePath);
            Response.Clear();
            Response.ClearContent();
            Response.ClearHeaders();// "attachment;filename=" + HttpUtility.UrlEncode(Encoding.GetEncoding(65001).GetBytes(name))
            Response.AddHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(Encoding.GetEncoding(65001).GetBytes(zipname)));
            Response.AddHeader("Content-Length", fileInfo.Length.ToString());
            Response.AddHeader("Content-Range", "bytes 0-" + (fileInfo.Length - 1) + "/" + fileInfo.Length);
            Response.AddHeader("Content-Transfer-Encoding", "binary");
            Response.ContentType = "application/octet-stream";
            Response.ContentEncoding = Encoding.GetEncoding("gb2312");
            Response.Flush();
            //文件发送到客户端
            Response.WriteFile(fileInfo.FullName); 
            Response.End();
            Response.Close();
            //string zipName = "违法停车.zip";
            //string filePath = Server.MapPath("~/Download/" + fileName + "");
            ////string filePath = Base_Dir + "\\" + fileName;
            //FileStream fs = new FileStream(filePath, FileMode.Open);//使用字节流的方式打开
            //byte[] bytes = new byte[(int)fs.Length];
            //fs.Read(bytes, 0, bytes.Length);
            //fs.Close();
            //Response.ContentType = "application/octet-stream";
            //Response.AddHeader("Title", fileName);
            ////通知浏览器下载文件而不是打开
            //Response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode(zipName, System.Text.Encoding.UTF8));
            //Response.BinaryWrite(bytes);
            //Response.Flush();
            //Response.End();
        }

  

 删除文件,此处有些麻烦,会有更好的解决方式

//删除文件夹 public void DelectDir(string srcPath) { if (File.Exists(srcPath)) { // 2、根据路径字符串判断是文件还是文件夹 FileAttributes attr = File.GetAttributes(srcPath); // 3、根据具体类型进行删除 if (attr == FileAttributes.Directory) { // 3.1、删除文件夹 Directory.Delete(srcPath, true); } else { // 3.2、删除文件 File.Delete(srcPath); } File.Delete(srcPath); } } //删除download文件夹下的所有子文件,删除zip文件 public void DeleteDir(string file) { try { //去除文件夹和子文件的只读属性 //去除文件夹的只读属性 DirectoryInfo fileInfo = new DirectoryInfo(file); fileInfo.Attributes = FileAttributes.Normal & FileAttributes.Directory; //去除文件的只读属性 File.SetAttributes(file, FileAttributes.Normal); //判断文件夹是否还存在 if (Directory.Exists(file)) { foreach (string f in Directory.GetFileSystemEntries(file)) { if (File.Exists(f)) { //如果有子文件删除文件 File.Delete(f); Console.WriteLine(f); } else { //循环递归删除子文件夹 DeleteDir(f); } } //删除空文件夹 Directory.Delete(file); } } catch (Exception ex) // 异常处理 { Console.WriteLine(ex.Message.ToString());// 异常信息 } }

  

代码调用

using System.Data;
using System.Text;
using System.IO;

using System.Text;

using System.Web;

获取需要打包的数据
DataTable table = new DataTable();
string str="select img1,img2,carcode,address,updatetime from table";
table = this.BaseRepository().FindTable(str.ToString());
//创建一级菜单,目录为~Download/记录_202107300902 
string dt = DateTime.Now.ToString("yyyyMMddHHmmss");
string firstPath = df.FirstCreate(dt);
foreach (DataRow dr in table.Rows)
{
string carcode = dr["carcode"].ToString();
   string carcode = dr["address"].ToString();
   string carcode = dr["img1"].ToString();
   string carcode = dr["img2"].ToString();

//创建二级菜单,并将url地址图片存放到二级菜单中

        string TheFolder = df.SecondCreate(firstPath, updatetime, carcode);
        //图片地址
        string Img1 = TheFolder + "\\" + carcode + "_1.jpg";
        string Img2 = TheFolder + "\\" + carcode + "_2.jpg";
        //图片下载到子文件夹中
        SavePhotoFromUrl(Img1, img1Url);
        SavePhotoFromUrl(Img2, img2Url);

        //将其他数据存储到txt文件中

         txtData(TheFolder,carcode,address,updatetime);

}

//待压缩的文件或文件夹路径路径+文件名称
string ZipFilePath = @System.AppDomain.CurrentDomain.BaseDirectory + @"Download /记录_" + FirstFileName + ".zip";
CreateZip(firstPath, ZipFilePath);

//下载文件

this.OutPutZipFile(Request.RequestContext.HttpContext.ApplicationInstance.Context, zipName);//调用方式

//删除文件

string destFilePath = @System.AppDomain.CurrentDomain.BaseDirectory + @"Download/记录_" + FirstFileName ;
DeleteDir(destFilePath);
string Path = @System.AppDomain.CurrentDomain.BaseDirectory + @"Download/记录_" + FirstFileName + ".zip";
DelectDir(Path);


 

 

       注意: 

 1、添加引用CSharpCode.SharpZipLib.dll ,此处引用的版本为:0.85.4.369。

      引用0.85.4.369版本的dll从服务器上下载解压没有问题,但是添加了0.86.0.518版本,从服务器上下载下来后解压提示图片文件头损坏。【此处巨坑。。。。。。】

添加引用的方式(vs2017):

工具——NuGet包管理器——管理解决方案的NuGet程序包

 

 

2、添加后,运行代码,可能会报出【未能加载文件或程序集“ICSharpCode.SharpZipLib”或它的某一个依赖项】这种错误,

     解决方式:将ICSharpCode.SharpZipLib.dll 复制到web下的bin下面即可。

 

标签:文件,string,zip,c#,压缩成,文件夹,File,Response,carcode
来源: https://www.cnblogs.com/syeacfpl/p/15078098.html

本站声明: 1. iCode9 技术分享网(下文简称本站)提供的所有内容,仅供技术学习、探讨和分享;
2. 关于本站的所有留言、评论、转载及引用,纯属内容发起人的个人观点,与本站观点和立场无关;
3. 关于本站的所有言论和文字,纯属内容发起人的个人观点,与本站观点和立场无关;
4. 本站文章均是网友提供,不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属;如您发现该文章侵犯了您的权益,可联系我们第一时间进行删除;
5. 本站为非盈利性的个人网站,所有内容不会用来进行牟利,也不会利用任何形式的广告来间接获益,纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。

专注分享技术,共同学习,共同进步。侵权联系[81616952@qq.com]

Copyright (C)ICode9.com, All Rights Reserved.

ICode9版权所有