protected string getTmpFileName()
{
string tmpDir = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "tmp");
//MessageBox.Show(tmpDir);
if (!I3DirectoryUtil.CreateDirctory(tmpDir).State)
{
throw new Exception("临时目录创建失败");
}
try
{
I3DirectoryUtil.CheckAndClearDirctory(tmpDir);
}
catch
{
}
string tmpFileName = Path.Combine(tmpDir, Guid.NewGuid().ToString() + ".xls");
return(tmpFileName);
}
/// <summary>
/// 根据fileInfoList的设置，生成新的压缩包文件
///
/// 错误处理：IEFS_Error.LastErrorMessage
///
/// </summary>
/// <returns></returns>
public I3MsgInfo Flush()
{
#region 定义变量
string message;
ZipOutputStream outputStream = null;
int addFileCount = GetAddFileCount() + GetNormalFileCount();
long totalAddFileSize = GetTotalAddFileSize() + GetTotalNormalFileSize(); //所有需要压缩的文件的字节数
long passFileSize = 0; //已经压缩的文件的字节数
long totalPosition = 0; //总共压缩到的字节数
#endregion
#region 检查临时文件与临时目录
string tmpFile = fileName + ".tmpsharpzip";
if (!I3FileUtil.CheckFileNotExists(tmpFile))
{
return(new I3MsgInfo(false, ""));
}
string tmpDir = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, I3DateTimeUtil.ConvertDateTimeToLongString(DateTime.Now));
I3MsgInfo msg = I3DirectoryUtil.CheckAndClearDirctory(tmpDir);
if (!msg.State)
{
return(msg);
}
#endregion
try
{
#region 解压所有不需要替换或者删除的文件到临时目录
msg = UnCompressAllFile(tmpDir, true);
if (!msg.State)
{
return(msg);
}
#endregion
#region 开始压缩状态为normal、New、Change三种状态的文件到临时文件中
try
{
#region 压缩
outputStream = new ZipOutputStream(File.Create(tmpFile));
outputStream.SetLevel(zipLevel);
if (!string.IsNullOrEmpty(passWord))
{
outputStream.Password = passWord;
}
int fileindex = 0;
foreach (I3SharpZipFileInfo info in fileInfoList)
{
#region 判断文件是否要参与压缩
if (info.Mode == I3SZFileInfoMode.szimDelete)
{
continue;
}
#endregion
#region 发送文件个数进度信息
message = "正在压缩文件\"" + info.FileName + "\"";
fileindex++;
OnMutiFileProcessReport(addFileCount, fileindex, message);
#endregion
#region 写入ZipEntry
//outputStream.PutNextEntry(GetEntry(info.FileName, info.FullName));
//自己在ZipEntry中写入CRC信息，读取时会报Eof of Header的错误
//在网上查找资料后发现，新版SharpZip.dll已经更改，不再需要自己写入CRC等信息
outputStream.PutNextEntry(new ZipEntry(info.FileName));
info.Mode = I3SZFileInfoMode.szimNormal;
if (info.FileSize == 0)
{
continue;
}
#endregion
FileStream sourceFileStream = null;
try
{
#region 将文件写入压缩流
sourceFileStream = File.OpenRead(info.FullName);
sourceFileStream.Position = 0;
//IEFS_Stream.WriteStreamToStream(null, sourceFileStream, outputStream, blockSize, null);
byte[] data = new byte[blockSize];
long longsize = 0;
while (true)
{
int size = sourceFileStream.Read(data, 0, data.Length);
if (size > 0)
{
outputStream.Write(data, 0, size);
longsize += size;
OnSingleFileProcessReport(info.FileSize, longsize, message);
totalPosition = passFileSize + longsize;
OnTotalBytesProcessReport(totalAddFileSize, totalPosition, message);
}
else
{
break;
}
}
passFileSize += longsize;
#endregion
}
finally
{
#region 释放单个文件的文件流
if (sourceFileStream != null)
{
sourceFileStream.Close();
}
#endregion
}
}
#endregion
}
#region 错误处理
catch (Exception ex)
{
return(new I3MsgInfo(false, ex.Message, ex));
}
#endregion
#region 释放变量 删除临时目录
finally
{
if (outputStream != null)
{
outputStream.Finish();
outputStream.Close();
}
I3DirectoryUtil.DeleteDirctory(tmpDir);
}
#endregion
#endregion
#region 替换原始文件
if (!I3FileUtil.CheckFileNotExists(fileName))
{
return(new I3MsgInfo(false, ""));
}
return(I3FileUtil.MoveFile(tmpFile, fileName, true));
#endregion
}
finally
{
I3DirectoryUtil.DeleteDirctory(tmpDir);
I3FileUtil.CheckFileNotExists(tmpFile);
}
}
