asp.net文件压缩，下载，物理路径，相对路径，删除文件

知识动手实践一次，就可以变成自己的了。不然一直是老师的，书本的。

这几天做了一个小小的项目，需要用到文件下载功能，期初想到只是单个的文件，后面想到如果很多文件怎么办？于是又想到文件压缩。几经波折实践，总是达到了我想要的效果了。现今把作为一个笔记记录下来，以便下次之用。

#region 物理路径和相对路径的转换
//本地路径转换成URL相对路径
public static string urlconvertor(string imagesurl1)
{
string tmpRootDir = HttpContext.Current.Server.MapPath(System.Web.HttpContext.Current.Request.ApplicationPath.ToString());//获取程序根目录
string imagesurl2 = imagesurl1.Replace(tmpRootDir, ""); //转换成相对路径
imagesurl2 = imagesurl2.Replace(@"\", @"/");
//imagesurl2 = imagesurl2.Replace(@"Aspx_Uc/", @"");
return imagesurl2;
}
//相对路径转换成服务器本地物理路径
public static string urlconvertorlocal(string imagesurl1)
{
string tmpRootDir = HttpContext.Current.Server.MapPath(System.Web.HttpContext.Current.Request.ApplicationPath.ToString());//获取程序根目录
string imagesurl2 = tmpRootDir + imagesurl1.Replace(@"/", @"\"); //转换成绝对路径
return imagesurl2;
}
#endregion

/// <summary>
/// 获取物理地址
/// </summary>
public static string MapPathFile(string FileName)
{
return HttpContext.Current.Server.MapPath(FileName);
}
/// <summary>
/// 普通下载
/// </summary>
/// <param name="FileName">文件虚拟路径</param>
public static bool DownLoadold(string FileName)
{
bool bools = false;
string destFileName = FileName;// urlconvertor(FileName);// MapPathFile(FileName);
if (File.Exists(destFileName))
{
FileInfo fi = new FileInfo(destFileName);
HttpContext.Current.Response.Clear();
HttpContext.Current.Response.ClearHeaders();
HttpContext.Current.Response.Buffer = false;
HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(Path.GetFileName(destFileName), System.Text.Encoding.UTF8));
HttpContext.Current.Response.AppendHeader("Content-Length", fi.Length.ToString());
HttpContext.Current.Response.ContentType = "application/octet-stream";
HttpContext.Current.Response.WriteFile(destFileName);
HttpContext.Current.Response.Flush();
AiLvYou.Common.DownUnit.FilePicDelete(destFileName);//删除当前下载的文件
HttpContext.Current.Response.End();

bools = true;
}
return bools;
}

//检查文件是否已经存在存在才下载
public static bool FileExists(string path)
{
bool ret = false;
System.IO.FileInfo file = new System.IO.FileInfo(path);
if (file.Exists)
{
ret = true;
}
return ret;
}
/// <summary>
/// 删除单个文件
/// </summary>
/// <param name="path"></param>
/// <returns></returns>
public static bool FilePicDelete(string path)
{
bool ret = false;
System.IO.FileInfo file = new System.IO.FileInfo(path);
if (file.Exists)
{
file.Delete();
ret = true;
}
//else //删除目录
//{
// Directory.Delete(file );
//}
return ret;
}

/// <summary>
/// 用递归方法删除文件夹目录及文件
/// </summary>
/// <param name="dir">带文件夹名的路径</param>
public  static void DeleteFolder(string dir)
{
if (Directory.Exists(dir)) //如果存在这个文件夹删除之
{
foreach (string d in Directory.GetFileSystemEntries(dir))
{
if (File.Exists(d))
File.Delete(d); //直接删除其中的文件
else
DeleteFolder(d); //递归删除子文件夹
}
Directory.Delete(dir, true); //删除已空文件夹
}
}

第一种压缩方法 用WinRAR 需要安装此软件 ，而且压缩了整个目录，目前还没有解决

//会有整个目录
public void RARsave(string patch, string rarPatch, string rarName)
{
String the_rar;
RegistryKey the_Reg;
Object the_Obj;
String the_Info;
ProcessStartInfo the_StartInfo;
Process the_Process;
try
{
the_Reg = Registry.ClassesRoot.OpenSubKey(@"WinRAR");

the_Obj = the_Reg.GetValue("");
the_rar = the_Obj.ToString();
the_Reg.Close();
the_rar = the_rar.Substring(1, the_rar.Length - 7);

Directory.CreateDirectory(patch);//20151222

//命令参数
//the_Info = " a    " + rarName + "  " + @"C:Test?70821.txt"; //文件压缩
the_Info = " a " + rarName + "  " + patch +"  -r";
the_StartInfo = new ProcessStartInfo();
the_StartInfo.FileName = "WinRar";//the_rar;
the_StartInfo.Arguments = the_Info;
the_StartInfo.WindowStyle = ProcessWindowStyle.Hidden;
//打包文件存放目录
the_StartInfo.WorkingDirectory = rarPatch;
the_Process = new Process();
the_Process.StartInfo = the_StartInfo;
the_Process.Start();
the_Process.WaitForExit();
the_Process.Close();

}
catch (Exception ex)
{
throw ex;
}
}

/**//****************************************
* 函数名称：CopyDir
* 功能说明：将指定文件夹下面的所有内容copy到目标文件夹下面 果目标文件夹为只读属性就会报错。
* 参    数：srcPath:原始路径,aimPath:目标文件夹
* 调用示列：
*          string srcPath = Server.MapPath("test/");
*          string aimPath = Server.MapPath("test1/");
*          EC.FileObj.CopyDir(srcPath,aimPath);
*****************************************/
/**//// <summary>
/// 指定文件夹下面的所有内容copy到目标文件夹下面
/// </summary>
/// <param name="srcPath">原始路径</param>
/// <param name="aimPath">目标文件夹</param>
public static void CopyDir(string srcPath, string aimPath)
{
try
{
// 检查目标目录是否以目录分割字符结束如果不是则添加之
if (aimPath[aimPath.Length - 1] != Path.DirectorySeparatorChar)
aimPath += Path.DirectorySeparatorChar;
// 判断目标目录是否存在如果不存在则新建之
if (!Directory.Exists(aimPath))
Directory.CreateDirectory(aimPath);
// 得到源目录的文件列表，该里面是包含文件以及目录路径的一个数组
//如果你指向copy目标文件下面的文件而不包含目录请使用下面的方法
//string[] fileList = Directory.GetFiles(srcPath);
string[] fileList = Directory.GetFileSystemEntries(srcPath);
//遍历所有的文件和目录
foreach (string file in fileList)
{
//先当作目录处理如果存在这个目录就递归Copy该目录下面的文件

if (Directory.Exists(file))
CopyDir(file, aimPath + Path.GetFileName(file));
//否则直接Copy文件
else
File.Copy(file, aimPath + Path.GetFileName(file), true);
}
}
catch (Exception ee)
{
throw new Exception(ee.ToString());
}
}

使用代码：

protected void btndown_Click(object sender, EventArgs e)
{
string Folder = DateTime.Now.ToString("HHMMss");
string savefilepath = HttpContext.Current.Server.MapPath("/admin/ueditor/net/htmlfile/upload");
string savefilepath2 = HttpContext.Current.Server.MapPath("/admin/ueditor/net/htmlfile/upload/image");

string tempFolder = Path.Combine(savefilepath, Folder);

Directory.CreateDirectory(tempFolder);
CopyDir(savefilepath2, tempFolder);

// RARsave(@"D:\images", tempFolder, Folder);控制了解压目录但是没有文件
RARsave(tempFolder, tempFolder, Folder);
}

第二种压缩方法，使用了 ICSharpCode.SharpZipLib.dll 文件。先下载，放到bin目录下，然后引用。

实现代码

/// <summary>
/// 生成压缩文件
/// </summary>
/// <param name="strZipPath">生成的zip文件的路径</param>
/// <param name="strZipTopDirectoryPath">源文件的上级目录</param>
/// <param name="intZipLevel">T压缩等级</param>
/// <param name="strPassword">压缩包解压密码</param>
/// <param name="filesOrDirectoriesPaths">源文件路径</param>
/// <returns></returns>
private bool Zip(string strZipPath, string strZipTopDirectoryPath, int intZipLevel, string strPassword, string[] filesOrDirectoriesPaths)
{
try
{
List<string> AllFilesPath = new List<string>();
if (filesOrDirectoriesPaths.Length > 0) // get all files path
{
for (int i = 0; i < filesOrDirectoriesPaths.Length; i++)
{
if (File.Exists(filesOrDirectoriesPaths[i]))
{
AllFilesPath.Add(filesOrDirectoriesPaths[i]);
}
else if (Directory.Exists(filesOrDirectoriesPaths[i]))
{
GetDirectoryFiles(filesOrDirectoriesPaths[i], AllFilesPath);
}
}
}

if (AllFilesPath.Count > 0)
{

ZipOutputStream zipOutputStream = new ZipOutputStream(File.Create(strZipPath));
zipOutputStream.SetLevel(intZipLevel);
zipOutputStream.Password = strPassword;

for (int i = 0; i < AllFilesPath.Count; i++)
{
string strFile = AllFilesPath[i].ToString();
try
{
if (strFile.Substring(strFile.Length - 1) == "") //folder
{
string strFileName = strFile.Replace(strZipTopDirectoryPath, "");
if (strFileName.StartsWith(""))
{
strFileName = strFileName.Substring(1);
}
ZipEntry entry = new ZipEntry(strFileName);
entry.DateTime = DateTime.Now;
zipOutputStream.PutNextEntry(entry);
}
else //file
{
FileStream fs = File.OpenRead(strFile);

byte[] buffer = new byte[fs.Length];
fs.Read(buffer, 0, buffer.Length);

string strFileName = strFile.Replace(strZipTopDirectoryPath, "");
if (strFileName.StartsWith(""))
{
strFileName = strFileName.Substring(0);
}
ZipEntry entry = new ZipEntry(strFileName);
entry.DateTime = DateTime.Now;
zipOutputStream.PutNextEntry(entry);
zipOutputStream.Write(buffer, 0, buffer.Length);

fs.Close();
fs.Dispose();
}
}
catch
{
continue;
}
}

zipOutputStream.Finish();
zipOutputStream.Close();

return true;
}
else
{
return false;
}
}
catch
{
return false;
}
}
/// <summary>
/// Gets the directory files.
/// </summary>
/// <param name="strParentDirectoryPath">源文件路径</param>
/// <param name="AllFilesPath">所有文件路径</param>
private void GetDirectoryFiles(string strParentDirectoryPath, List<string> AllFilesPath)
{
string[] files = Directory.GetFiles(strParentDirectoryPath);
for (int i = 0; i < files.Length; i++)
{
AllFilesPath.Add(files[i]);
}
string[] directorys = Directory.GetDirectories(strParentDirectoryPath);
for (int i = 0; i < directorys.Length; i++)
{
GetDirectoryFiles(directorys[i], AllFilesPath);
}
if (files.Length == 0 && directorys.Length == 0) //empty folder
{
AllFilesPath.Add(strParentDirectoryPath);
}
}

调用代码：

protected void btndowmload_Click(object sender, EventArgs e)
{
//http://www.cnblogs.com/LYunF/archive/2012/02/18/2357591.html

string Folder = DateTime.Now.ToString("HHMMss");
string savefilepath = HttpContext.Current.Server.MapPath("/admin/ueditor/net/htmlfile/upload");
string savefilepath2 = HttpContext.Current.Server.MapPath("/admin/ueditor/net/htmlfile/upload/image");

// 判断目标目录是否存在如果不存在则新建之
/*
string newfilepath = Path.Combine(savefilepath, Folder);
if (!Directory.Exists(newfilepath))
Directory.CreateDirectory(newfilepath);//问题目录问题
string newfilepath2 = HttpContext.Current.Server.MapPath("/admin/ueditor/net/htmlfile/upload"+"/"+Folder);
string strZipTopDirectoryPath = newfilepath2;
string tempFolder = Path.Combine(newfilepath2, Folder);

*/
string tempFolder = Path.Combine(savefilepath, Folder);
string strZipTopDirectoryPath = savefilepath;
string strZipPath = tempFolder + ".zip";
int intZipLevel = 6;
string strPassword = "";
string[] filesOrDirectoriesPaths = new string[] { savefilepath2 };
bool flag = Zip(strZipPath, strZipTopDirectoryPath, intZipLevel, strPassword, filesOrDirectoriesPaths);
if (flag)
{
ResponseFile(strZipPath);
}
}

下载代码：

protected void ResponseFile(string fileName)
{

FileInfo fileInfo = new FileInfo(fileName);
Response.Clear();
Response.ClearContent();
Response.ClearHeaders();
//  Response.AddHeader("Content-Disposition", "attachment;filename=" + fileName); //upload 这里可以改变下载名称
Response.AddHeader("Content-Disposition", "attachment;filename=upload.zip"); //
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();
// string tempPath = fileName.Substring(0, fileName.LastIndexOf("\\"));
AiLvYou.Common.DownUnit.FilePicDelete(fileName);
// Directory.Delete(tempPath);
Response.End();

}