怎么样将一个文件复制到指定位置 谢谢 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 copyfile(filename,newfilename,flase)false是覆盖,true换名copy 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;{This way uses memory blocks for read/write.}procedure FileCopy(const FromFile, ToFile: string); var FromF, ToF: file; NumRead, NumWritten: Word; Buf: array[1..2048] of Char;begin AssignFile(FromF, FromFile); Reset(FromF, 1); { Record size = 1 } AssignFile(ToF, ToFile); { Open output file } Rewrite(ToF, 1); { Record size = 1 } repeat BlockRead(FromF, Buf, SizeOf(Buf), NumRead); BlockWrite(ToF, Buf, NumRead, NumWritten); until (NumRead = 0) or (NumWritten <> NumRead); System.CloseFile(FromF); System.CloseFile(ToF);end;{This one uses LZCopy, which 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;电子书库里的,应该能用 delphi如何修改打印机首选项设置 加了半年班,暂时可以松口气了,散分 fastreport 预览时如何把多页报表顺序的显示在一页上,不分页? 去重复数据 请教用fastreport控件能完成在打印预览中可以修改报表吗? 怎么用Delphi把图片存入Oracle数据库? 使用TGifImage开始播放gif动画,怎样知道播放到哪一帧? 如何更改一个磁盘的卷标? 能不能提供个高效的压缩BMP格式的算法,有损的,帮帮忙? 怎样使窗口标题栏中的“关闭”按钮变灰? DBgrid中如何显示时间格式? 谁有五子棋源程序和文档阿?高分!!
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;{This way uses memory blocks for read/write.}procedure FileCopy(const FromFile, ToFile: string);
var
FromF, ToF: file;
NumRead, NumWritten: Word;
Buf: array[1..2048] of Char;
begin
AssignFile(FromF, FromFile);
Reset(FromF, 1); { Record size = 1 }
AssignFile(ToF, ToFile); { Open output file }
Rewrite(ToF, 1); { Record size = 1 }
repeat
BlockRead(FromF, Buf, SizeOf(Buf), NumRead);
BlockWrite(ToF, Buf, NumRead, NumWritten);
until (NumRead = 0) or (NumWritten <> NumRead);
System.CloseFile(FromF); System.CloseFile(ToF);
end;{This one uses LZCopy, which 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;电子书库里的,应该能用