/// <summary>
/// 處理在解壓縮時,如果在目標目錄下已經存在相同的文件,提示用戶是否替換已存在文件
/// </summary>
/// <param name="filename">解壓後文件</param>
/// <returns>是否替換已存在的文件,是將替換,否不替換</returns>
private bool _ProcessOverwrite(string filename)
{
bool isOverWrite = false;
ZipHelpEventArgs e = new ZipHelpEventArgs(filename, isOverWrite);
OnZipHelperProcessOverWrite(e);
return e.IsOverWrite;
}
/// <summary>
/// 處理在壓縮時,如果在目標目錄下已經存在相同的文件,提示用戶是否替換已存在的壓縮文件
/// </summary>
/// <param name="e"></param>
private void _ProcessOverwrite(ZipHelpEventArgs e)
{
OnZipHelperProcessOverWrite(e);
}
#endregion
#region 靜態方法
/// <summary>
/// 獲取單個文件壓縮後大小
/// </summary>
/// <param name="filename">要壓縮的文件路徑</param>
/// <param name="tempDir">臨時目錄</param>
/// <returns>文件大小(以字節為單位)</returns>
public static long GetFileCompressedSize(string fileName, string tempDir)
{
long rv = 0;
//以當前時間點為文件名,以防止文件沖突
string targetFile = Path.Combine(tempDir, _GetCurrDatetime() + ".zip");
//創建臨時壓縮文件
ZipOutputStream zipOut = new ZipOutputStream(File.Create(targetFile));
try
{
FileInfo fi = new FileInfo(fileName);
ZipEntry entry = new ZipEntry(fi.Name);
FileStream sReader = File.OpenRead(fileName);
byte[] buff = new byte[Convert.ToInt32(sReader.Length)];
sReader.Read(buff, 0, (int)sReader.Length);
entry.Size = sReader.Length;
sReader.Close();
entry.DateTime = fi.LastWriteTime;
zipOut.PutNextEntry(entry);
zipOut.Write(buff, 0, buff.Length);
zipOut.Finish();
zipOut.Close();
if (File.Exists(targetFile))
{
FileInfo fi2 = new FileInfo(targetFile);
rv = fi2.Length;
}
}
catch (Exception ex)
{
throw ex;
}
finally
{
//刪除臨時文件
if (File.Exists(targetFile))
{
File.Delete(targetFile);
}
}
return rv;
}
/// <summary>
/// 獲取某文件列表壓縮後大小
/// </summary>
/// <param name="filename">要壓縮的文件路徑數組</param>
/// <param name="tempDir">臨時目錄</param>
/// <returns>文件大小(以字節為單位)</returns>
public static long GetFileCompressedSize(string[] fileList, string tempDir)
{
long rv = 0;
//以當前時間點為文件名,以防止文件沖突
string targetFile = Path.Combine(tempDir, _GetCurrDatetime() + ".zip");
//創建臨時壓縮文件
ZipOutputStream zipOut = new ZipOutputStream(File.Create(targetFile));
try
{
foreach (string fName in fileList)
{
FileInfo fi = new FileInfo(fName);
ZipEntry entry = new ZipEntry(fi.Name);
FileStream sReader = File.OpenRead(fName);
byte[] buff = new byte[Convert.ToInt32(sReader.Length)];
sReader.Read(buff, 0,(int)sReader.Length);
entry.Size = sReader.Length;
sReader.Close();
entry.DateTime = fi.LastWriteTime;
zipOut.PutNextEntry(entry);
zipOut.Write(buff, 0, buff.Length);
}
zipOut.Finish();
zipOut.Close();
if (File.Exists(targetFile))
{
FileInfo fi2 = new FileInfo(targetFile);
rv = fi2.Length;
}
}
catch (Exception ex)
{
throw ex;
}
finally
{
//刪除臨時文件
if (File.Exists(targetFile))
{
File.Delete(targetFile);
}
}
return rv;
}
/// <summary>
/// 獲取壓縮文件裡的文件列表
/// </summary>
/// <remarks>忽略壓縮文件中的目錄，只返回文件。</remarks>
/// <param name="filename">壓縮文件路徑</param>
/// <param name="tempDir">臨時目錄</param>
/// <returns>文件名數組</returns>
public static string[] GetFileList(string fileName, string tempDir)
{
FastZip fz = new FastZip();
fz.RestoreDateTimeOnExtract = true;
string[] rv;
//在當前程序路徑/Temp 下創建臨時目錄
string tempdir = Path.Combine(tempDir, "tempzip");
try
{
fz.ExtractZip(fileName, tempdir, "");
rv = Directory.GetFiles(tempdir);
//刪除臨時文件
Directory.Delete(tempdir, true);
}
catch (Exception ex)
{
rv = null;
throw ex;
}
return rv;
}
/// <summary>
/// 抽取壓縮文件裡的某個文件
/// </summary>
/// <param name="ZipFileName">壓縮文件路徑</param>
/// <param name="zipFileName">壓縮文件路徑</param>
/// <param name="extraFileName">要抽取的文件名</param>
/// <param name="targetDir">抽取文件保存目錄</param>
/// <param name="tempDir">臨時目錄</param>
public static bool GetFile(string zipFileName, string extraFileName, string targetDir, string tempDir)
{
bool rv = false;
FastZip fz = new FastZip(); fz.RestoreDateTimeOnExtract = true;
string targetFileName = "";
string[] tempfiles;
FileInfo fi;
//在當前程序路徑/temp 下 創建臨時目錄
string tempdir = Path.Combine(tempDir, "tempzip");
try
{
fz.ExtractZip(zipFileName, tempdir, "");
tempfiles = Directory.GetFiles(tempdir);
foreach (string fname in tempfiles)
{
fi = new FileInfo(fname);
if (fi.Name.Equals(extraFileName))
{
targetFileName = Path.Combine(targetDir, fi.Name);
File.Move(fi.FullName, targetFileName);
break;
}
}
//刪除臨時目錄
Directory.Delete(tempdir, true);
//檢查目標文件是否已經創建
if (File.Exists(targetFileName))
rv = true;
else
rv = false;
}
catch (Exception ex)
{
rv = false;
throw ex;
}
return rv;
}
/// <summary>
/// 獲取當前時間點，精確到毫秒
/// </summary>
/// <returns>時間點字符串</returns>
private static string _GetCurrDatetime()
{
DateTime dt = System.DateTime.Now;
string rv = dt.Year.ToString() + dt.Month.ToString() + dt.Day.ToString() + dt.Hour.ToString() + dt.Minute.ToString() + dt.Second.ToString() + dt.Millisecond.ToString();
return rv;
}
#endregion
#endregion
}
}
