/// <summary>
/// 获取文件片段信息
/// </summary>
/// <param name="fileName"></param>
/// <param name="system"></param>
/// <returns></returns>
public FileSliceInfo GetFileSliceInfo(string fileName, SeatManageSubsystem system)
{
try
{
//fileName = fileName.Substring(fileName.IndexOf("\\"));
string filepath = uploadFolder + string.Format(@"{0}\", system.ToString()) + fileName;
FileSliceInfo file = new FileSliceInfo();
file.Name = fileName;
file.Length = 0;
file.Offset = 0;
file.Data = null;
if (System.IO.File.Exists(filepath + ".tz"))
{
System.IO.FileInfo fi = new System.IO.FileInfo(filepath + ".tz");
file.Length = fi.Length;
file.Offset = fi.Length;//返回追加数据后的文件位置
fi = null;
return(file);
}
else
{
return(null);
}
}
catch (Exception ex)
{
throw ex;
}
}
public byte[] FileDownLoad(String fileName, Int64 Offset, SeatManageSubsystem system)
{
try
{
int maxSiz = 1024 * bufferLen; //设置每次传100k
string filePath = "";
if (fileName.IndexOf(@"\") == 0) //如果\第一次出现的位置为1，则不用加斜杠
{
filePath = string.Format("{0}{1}{2}", uploadFolder, system.ToString(), fileName);
}
else
{
filePath = string.Format(@"{0}{1}\{2}", uploadFolder, system.ToString(), fileName);
}
// string filePath = uploadFolder + string.Format(@"{0}", system.ToString()) + fileName;
//获得客户端信息
OperationContext context = OperationContext.Current;
MessageProperties messageProperties = context.IncomingMessageProperties;
RemoteEndpointMessageProperty endpointProperty = (RemoteEndpointMessageProperty)messageProperties[RemoteEndpointMessageProperty.Name];
lock (downloadObject)
{
Stream stream = new FileStream(filePath, FileMode.Open, FileAccess.Read);
Int64 Length = stream.Length;
if (Offset == Length)
{
return(null);
}
byte[] ReData = new byte[Length - Offset <= maxSiz ? stream.Length - Offset : maxSiz]; //设置传递的数据的大小
stream.Position = Offset; //设置本地文件数据的读取位置
stream.Read(ReData, 0, ReData.Length); //把数据写入到file.Data中
stream.Close();
return(ReData);
}
}
catch (Exception ex)
{
throw ex;
}
}
internal FileSliceInfo_Md5 GetFilesSlice_Md5Info(string fileName, SeatManageSubsystem system)
{
try
{
string filepath = "";
if (fileName.IndexOf(@"\") == 0)//如果\第一次出现的位置为1，则不用加斜杠
{
filepath = string.Format("{0}{1}{2}", uploadFolder, system.ToString(), fileName);
}
else
{
filepath = string.Format(@"{0}{1}\{2}", uploadFolder, system.ToString(), fileName);
}
FileSliceInfo_Md5 file = new FileSliceInfo_Md5();
file.Name = fileName;
file.Length = 0;
file.Offset = 0;
file.Data = null;
if (System.IO.File.Exists(filepath))
{
//文件已经存在
System.IO.FileInfo fi = new System.IO.FileInfo(filepath);
file.Md5 = SeatManage.SeatManageComm.SeatComm.GetMD5HashFromFile(filepath);
file.Length = fi.Length;
file.Offset = fi.Length;//返回追加数据后的文件位置
fi = null;
return(file);
}
else
{
return(null);
}
}
catch (Exception ex)
{
throw ex;
}
}
public bool DeleteFile(string fileName, SeatManageSubsystem system)
{
try
{
//fileName = fileName.Substring(fileName.IndexOf("\\"));
string filepath = uploadFolder + string.Format(@"{0}\", system.ToString()) + fileName;
if (System.IO.File.Exists(filepath))
{
File.Delete(filepath);
}
return(true);
}
catch (Exception ex)
{
throw ex;
}
}
public Int64 FileUpLoad(String fileName, Byte[] fileByte, Int64 Length, Int64 Offset, SeatManageSubsystem system)
{
Int64 ReturnOffset = 0;
//uploadFolder + string.Format(@"{0}\", system.ToString()) + fileName;
string filePath = "";
if (fileName.IndexOf(@"\") == 0)//如果\第一次出现的位置为1，则不用加斜杠
{
filePath = string.Format("{0}{1}{2}", uploadFolder, system.ToString(), fileName);
}
else
{
filePath = string.Format(@"{0}{1}\{2}", uploadFolder, system.ToString(), fileName);
}
string directoryPath = filePath.Substring(0, filePath.LastIndexOf("\\"));
//获取文件的路径,已经保存的文件名
if (!Directory.Exists(directoryPath))
{
Directory.CreateDirectory(directoryPath);
}
try
{
lock (UploadObj)
{
FileStream fs = new FileStream(filePath + ".tz", FileMode.OpenOrCreate);
if (fs == null)
{
fs = new FileStream(filePath, FileMode.OpenOrCreate);
}
if (fs.Length == Length)
{
if (File.Exists(filePath + ".tz"))
{
File.Move(filePath + ".tz", filePath);
}
fs.Close();
}
try
{
//文件偏移位置,表示从这个位置开始进行后面的数据添加
BinaryWriter writer = new BinaryWriter(fs);//初始化文件写入器
if (Offset >= int.MaxValue)
{
writer.Seek(int.MaxValue, SeekOrigin.Begin);
Offset = Offset - int.MaxValue;
while (Offset > 0)//判断Offset是否大于int类型所能表示的最大值
{
if (Offset >= int.MaxValue)
{
writer.Seek(int.MaxValue, SeekOrigin.Current);
Offset = Offset - int.MaxValue;
}
else
{
writer.Seek(int.Parse(Offset.ToString()), SeekOrigin.Current);
Offset = 0;
}
}
}
else
{
writer.Seek(Int32.Parse(Offset.ToString()), SeekOrigin.Begin); //设置文件的写入位置
}
writer.Write(fileByte); //写入数据
ReturnOffset = fs.Length; //返回追加数据后的文件位置
fileByte = null;
writer.Close();
fs.Close();
}
catch (Exception ex)
{
fs.Close();
throw ex;
}
if (ReturnOffset == Length)
{
if (File.Exists(filePath + ".tz"))
{
if (File.Exists(filePath))
{
bool isDel = false;
while (!isDel)
{
try
{
File.Delete(filePath);
isDel = true;
}
catch (Exception ex)
{
isDel = false;
System.Threading.Thread.Sleep(500);
}
}
}
File.Move(filePath + ".tz", filePath);
}
}
}
return(ReturnOffset);
}
catch (Exception ex)
{
throw new Exception("锁定的代码内出错：" + ex.Message);
}
//try
//{
//}
//catch (Exception ex)
//{
// throw new Exception("出错在删除临时文件：" + ex.Message);
//}
}
