/// <summary>
/// 得到文件名
/// </summary>
/// <param name="FileLabel">文件编号</param>
/// <returns>文件名</returns>
public string GetFileName(int FileLabel)
{
FileState state = FileLabelToState(FileLabel);
if (state == null)
{
throw new Exception("这文件已不存在");
}
string haveStr = EngineTool.StringRight(state.FileName, "\\");
return(haveStr);
}
/// <summary>
/// 发送方对一个文件包头进行加密得到一个byte[]
/// </summary>
/// <param name="fileSend"></param>
/// <returns></returns>
internal static byte[] FileHeadEncryption(FileState fileSend)
{
string fileName = EngineTool.StringRight(fileSend.FileName, "\\");
byte[] fileNameByte = Encoding.UTF8.GetBytes(fileName);
byte[] haveDate = new byte[15 + fileNameByte.Length];
haveDate[0] = PasswordCode._fileCode;
haveDate[1] = PasswordCode._sendUser;
haveDate[2] = PasswordCode._fileHeadCode;
ByteToDate.IntToByte(fileSend.FileLabel, 3, haveDate);
ByteToDate.IntToByte(fileSend.FileLenth, 7, haveDate);
fileNameByte.CopyTo(haveDate, 15);
return(haveDate);
}