摘要：
Delphi中的操作二进制文件的两个重要函数对于通过Byte数组进行文件操作的，在FTP中经常会使用到，我也是在Delphi调用WebService进行文件的上传和下载时找到这两个函数的，挺好用的，推荐给大家。
对于通过Byte数组进行文件操作的，在FTP中经常会使用到，我也是在Delphi调用Web Service进行文件的上传和下载时找到这两个函数的，挺好用的，推荐给大家。(申明：非本人所写)
1. 将Byte数组生成文件
procedureByteArrayToFile(constByteArray : TByteDynArray;constFileName : string );
var
Count: integer;
F: FIle of Byte;
pTemp: Pointer;
begin
AssignFile( F, FileName );
Rewrite(F);
try
Count := Length( ByteArray );
pTemp := @ByteArray[0];
BlockWrite(F, pTemp^, Count );
finally
CloseFile( F );
end;
end;
var
Count: integer;
F: FIle of Byte;
pTemp: Pointer;
begin
AssignFile( F, FileName );
Rewrite(F);
try
Count := Length( ByteArray );
pTemp := @ByteArray[0];
BlockWrite(F, pTemp^, Count );
finally
CloseFile( F );
end;
end;
2. 将文件生成Byte数组
functionFiIeToByteArray(constFileName:string ):TByteDynArray;
const
BLOCK_SIZE=1024;
var
BytesRead,BytesToWrite,Count:integer;
F:File of Byte;
pTemp:Pointer;
begin
AssignFile( F, FileName );
Reset(F);
try
Count := FileSize( F );
SetLength(Result, Count );
pTemp := @Result[0];
BytesRead := BLOCK_SIZE;
while(BytesRead = BLOCK_SIZE )do
begin
BytesToWrite := Min(Count, BLOCK_SIZE);
BlockRead(F, pTemp^, BytesToWrite , BytesRead );
pTemp := Pointer(LongInt(pTemp) BLOCK_SIZE);
Count := Count-BytesRead;
end;
finally
CloseFile( F );
end;
end;
const
BLOCK_SIZE=1024;
var
BytesRead,BytesToWrite,Count:integer;
F:File of Byte;
pTemp:Pointer;
begin
AssignFile( F, FileName );
Reset(F);
try
Count := FileSize( F );
SetLength(Result, Count );
pTemp := @Result[0];
BytesRead := BLOCK_SIZE;
while(BytesRead = BLOCK_SIZE )do
begin
BytesToWrite := Min(Count, BLOCK_SIZE);
BlockRead(F, pTemp^, BytesToWrite , BytesRead );
pTemp := Pointer(LongInt(pTemp) BLOCK_SIZE);
Count := Count-BytesRead;
end;
finally
CloseFile( F );
end;
end;