这里有三种方法
{利用文件流}
Procedure FileCopy( Const sourcefilename, targetfilename: String );
Var
S, T: TFileStream;
Begin
S := TFileStream.Create( sourcefilename, fmOpenRead );
try
T := TFileStream.Create( targetfilename, fmOpenWrite or fmCreate );
try
T.CopyFrom(S, S.Size ) ;
finally
T.Free;
end;
finally
S.Free;
end;
End;{这个方法用的是block read/write.}procedure FileCopy(const FromFile, ToFile: string);
var
FromF, ToF: file;
NumRead, NumWritten: Word;
Buf: array[1..2048] of Char;
fsize,fproc:integer;
begin
AssignFile(FromF, FromFile);
Reset(FromF, 1); { Record size = 1 }
fsize:=filesize(fromf);
AssignFile(ToF, ToFile); { Open output file }
Rewrite(ToF, 1); { Record size = 1 }
fproc:=0;
repeat
BlockRead(FromF, Buf, SizeOf(Buf), NumRead);
fproc:=fproc+numread;
BlockWrite(ToF, Buf, NumRead, NumWritten);
until (NumRead = 0) or (NumWritten <> NumRead);
System.CloseFile(FromF); System.CloseFile(ToF);
end;{利用 LZCopy,要 USES LZExpand.}
procedure CopyFile(FromFileName, ToFileName: string);
var
FromFile, ToFile: File;
begin
AssignFile(FromFile, FromFileName); { Assign FromFile to FromFileName }
AssignFile(ToFile, ToFileName); { Assign ToFile to ToFileName }
Reset(FromFile); { Open file for input }
try
Rewrite(ToFile); { Create file for output }
try { copy the file an if a negative value is returned raise an exception }
if LZCopy(TFileRec(FromFile).Handle, TFileRec(ToFile).Handle) < 0 then
raise Exception.Create('Error using LZCopy')
finally
CloseFile(ToFile); { Close ToFile }
end;
finally
CloseFile(FromFile); { Close FromFile }
end;
end;要显示进度你只能用第二种方法用blockread或blockwrite
进度就是该过程中的 "fproc*100 div fsize"(用百分数表示)
可以给满分了吧!
{利用文件流}
Procedure FileCopy( Const sourcefilename, targetfilename: String );
Var
S, T: TFileStream;
Begin
S := TFileStream.Create( sourcefilename, fmOpenRead );
try
T := TFileStream.Create( targetfilename, fmOpenWrite or fmCreate );
try
T.CopyFrom(S, S.Size ) ;
finally
T.Free;
end;
finally
S.Free;
end;
End;{这个方法用的是block read/write.}procedure FileCopy(const FromFile, ToFile: string);
var
FromF, ToF: file;
NumRead, NumWritten: Word;
Buf: array[1..2048] of Char;
fsize,fproc:integer;
begin
AssignFile(FromF, FromFile);
Reset(FromF, 1); { Record size = 1 }
fsize:=filesize(fromf);
AssignFile(ToF, ToFile); { Open output file }
Rewrite(ToF, 1); { Record size = 1 }
fproc:=0;
repeat
BlockRead(FromF, Buf, SizeOf(Buf), NumRead);
fproc:=fproc+numread;
BlockWrite(ToF, Buf, NumRead, NumWritten);
until (NumRead = 0) or (NumWritten <> NumRead);
System.CloseFile(FromF); System.CloseFile(ToF);
end;{利用 LZCopy,要 USES LZExpand.}
procedure CopyFile(FromFileName, ToFileName: string);
var
FromFile, ToFile: File;
begin
AssignFile(FromFile, FromFileName); { Assign FromFile to FromFileName }
AssignFile(ToFile, ToFileName); { Assign ToFile to ToFileName }
Reset(FromFile); { Open file for input }
try
Rewrite(ToFile); { Create file for output }
try { copy the file an if a negative value is returned raise an exception }
if LZCopy(TFileRec(FromFile).Handle, TFileRec(ToFile).Handle) < 0 then
raise Exception.Create('Error using LZCopy')
finally
CloseFile(ToFile); { Close ToFile }
end;
finally
CloseFile(FromFile); { Close FromFile }
end;
end;要显示进度你只能用第二种方法用blockread或blockwrite
进度就是该过程中的 "fproc*100 div fsize"(用百分数表示)
可以给满分了吧!
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VAR ShFileopStruct: TShFileOpStruct;
BEGIN
WITH ShFileOpStruct DO BEGIN
Wnd:=0;
wFunc:=Fo_Copy;
pFrom:=PChar(s);
pTO:=PChar(t);
fFlags:=Fof_CONFIRMMOUSE OR FOF_ALLOWUNDO;
END;
DCF:=ShFileOperation(ShFileOpStruct)=0;
END;