c# 创建文件夹、压缩成zip格式并下载
作者：互联网
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