FileOpen 开档. ----------------------------------------------------------------------------- Unit SysUtils 函数原型 function FileOpen(const FileName: string; Mode: Integer):Integer; **** 开档失败传回-1. 说明 以下有关档案读取都属低阶,如Dos Int 21h中有关档案的部 分. fmOpenRead = $0000; fmOpenWrite = $0001; fmOpenReadWrite = $0002; fmShareCompat = $0000; fmShareExclusive = $0010; fmShareDenyWrite = $0020; fmShareDenyRead = $0030; fmShareDenyNone = $0040; fmOpenRead Open for read access only. FmOpenWrite Open for write access only. FmOpenReadWrite Open for read and write access. fmShareCompat Compatible with the way FCBs are opened. fmShareExclusive Read and write access is denied. fmShareDenyWrite Write access is denied. fmShareDenyRead Read access is denied. fmShareDenyNone Allows full access for others. 范例 procedure OpenForShare(const FileName: String); var FileHandle : Integer; begin FileHandle := FileOpen(FileName, fmOpenWrite or fmShareDenyNone); if FileHandle > 0 then {valid file handle} else {Open error: FileHandle = negative DOS error code} end; 范例 procedure TForm1.Button1Click(Sender: TObject); var iFileHandle: Integer; iFileLength: Integer; iBytesRead: Integer; Buffer: PChar; i: Integer begin if OpenDialog1.Execute then begin try iFileHandle := FileOpen(OpenDialog1.FileName, fmOpenRead); iFileLength := FileSeek(iFileHandle,0,2); FileSeek(iFileHandle,0,0); Buffer := PChar(AllocMem(iFileLength + 1)); iBytesRead = FileRead(iFileHandle, Buffer, iFileLength); Fil eClose(iFileHandle); for i := 0 to iBytesRead-1 do begin StringGrid1.RowCount := StringGrid1.RowCount + 1; StringGrid1.Cells[1,i+1] := Buffer[i]; StringGrid1.Cells[2,i+1] := IntToStr(Integer(Buffer[i])); end; finally FreeMem(Buffer); end; end; end; ##FileOpen, FileSeek, FileRead Example ----------------------------------------------------------------------------- FileCreate 建档 ----------------------------------------------------------------------------- Unit SysUtils 函数原型 function FileCreate(const FileName: string): Integer;范例 procedure TForm1.Button1Click(Sender: TObject); var BackupName: string; FileHandle: Integer; StringLen: Integer; X: Integer; Y: Integer; begin if SaveDialog1.Execute then begin if FileExists(SaveDialog1.FileName) then begin BackupName := ExtractFileName(SaveDialog1.FileName); BackupName := ChangeFileExt(BackupName, '.BAK'); if not RenameFile(SaveDialog1.FileName, BackupName) then raise Exception.Create('Unable to create backup file.'); end; FileHandle := FileCreate(SaveDialog1.FileName); { Write out the number of rows and columns in the grid. } FileWrite(FileHandle, StringGrid1.ColCount, SizeOf(StringGrid1.ColCount)); FileWrite(FileHandle, StringGrid1.RowCount, SizeOf(StringGrid1.RowCount)); for X := 0 to StringGrid1.ColCount ? 1 do begin for Y := 0 to StringGrid1.RowCount ? 1 do begin { Write out the length of each string, followed by the string itself. } StringLen := Length(StringGrid1.Cells[X,Y]); FileWrite(FileHandle, StringLen, SizeOf(StringLen)); FileWrite(FileHandle, StringGrid1.Cells[X,Y], Length(StringGrid1.Cells[X,Y]); end; end; FileClose(FileHandle); end;end; ##FileExists, RenameFile, FileCreate, FileWrite, FileClose, ExtractFileName Example ----------------------------------------------------------------------------- FileClose 关档 ----------------------------------------------------------------------------- Unit SysUtils 函数原型 procedure FileClose(Handle: Integer); 范例 procedure TForm1.Button1Click(Sender: TObject); var BackupName: string; FileHandle: Integer; StringLen: Integer; X: Integer; Y: Integer; begin if SaveDialog1.Execute then begin if FileExists(SaveDialog1.FileName) then begin BackupName := ExtractFileName(SaveDialog1.FileName); BackupName := ChangeFileExt(BackupName, '.BAK'); if not RenameFile(SaveDialog1.FileName, BackupName) then raise Exception.Create('Unable to create backup file.'); end; FileHandl e := FileCreate(SaveDialog1.FileName); { Write out the number of rows and columns in the grid. } FileWrite(FileHandle, StringGrid1.ColCount, SizeOf(StringGrid1.ColCount)); FileWrite(FileHandle, StringGrid1.RowCount, SizeOf(StringGrid1.RowCount)); for X := 0 to StringGrid1.ColCount ? 1 do begin for Y := 0 to StringGrid1.RowCount ? 1 do begin { Write out the length of each string, followed by the string itself. } StringLen := Length(StringGrid1.Cells[X,Y]); FileWrite(FileHandle, StringLen, SizeOf(StringLen)); FileWrite(FileHandle, StringGrid1.Cells[X,Y], Length(StringGrid1.Cells[X,Y]); end; end; FileClose(FileHandle); end; end; ##FileExists, RenameFile, FileCreate, FileWrite, FileClose, ExtractFileName Example============================================ **** 它是以Handle为叁数. ============================================ FileRead 读取档案 ----------------------------------------------------------------------------- Unit SysUtils 函数原型 function FileRead(Handle: Integer; var Buffer; Count: Integer):Integer; 范例 procedure TForm1.Button1Click(Sender: TObject);var iFileHandle: Integer; iFileLength: Integer; iBytesRead: Integer; Buffer: PChar; i: Integer begin if OpenDialog1.Execute then begin try iFileHandle := FileOpen(OpenDialog1.FileName, fmOpenRead); iFileLength := FileSeek(iFileHandle,0,2); FileSeek(iFileHandle,0,0); Buffer := PChar(AllocMem(iFileLength + 1)); iBytesRead = FileRead(iFileHandle, Buffer, iFileLength); FileClose(iFileHandle); for i := 0 to iBytesRead-1 do begin StringGrid1.RowCount := StringGrid1.RowCount + 1; StringGrid1.Cells[1,i+1] := Buffer[i]; StringGrid1.Cells[2,i+1] := IntToStr(Integer(Buffer[i])); end; finally FreeMem(Buffer); end; end; end; ##FileOpen, FileSeek, FileRead Example
FileWrite 写入档案 ----------------------------------------------------------------------------- Unit SysUtils 函数原型 function FileWrite(Handle: Integer; const Buffer; Count: Integer): Integer; 范例 procedure TForm1.Button1Click(Sender: TObject); var BackupName: string; FileHandle: Integer; StringLen: Integer; X: Integer; Y: Integer; begin if SaveDialog1.Execute then begin if FileExists(SaveDialog1.FileName) then begin BackupName := ExtractFileName(SaveDialog1.FileName); BackupName := ChangeFileExt(BackupName, '.BAK'); if not RenameFile(SaveDialog1.FileName, BackupName) then raise Exception.Create('Unable to create backup file.'); end; FileHandle := FileCreate(SaveDialog1.FileName); { Write out the number of rows and columns in the grid. } FileWrite(FileHandle, StringGrid1.ColCount, SizeOf(StringGrid1.ColCount)); FileWrite(FileHandle, StringGrid1.RowCount, SizeOf(StringGrid1.RowCount)); for X := 0 to StringGrid1.ColCount do begin for Y := 0 to StringGrid1.RowCount do begin { Write out the length of each string, followed by the string itself. } StringLen := Length(StringGrid1.Cells[X,Y]); FileWrite(FileHandle, StringLen, SizeOf(StringLen)); FileWrite(FileHandle, StringGrid1.Cells[X,Y], Length(StringGrid1.Cells[X,Y]);//?????????/ end; end; FileClose(FileHandle); end; end; ##FileExists, RenameFile, FileCreate, FileWrite, FileClose, ExtractFileName Example ----------------------------------------------------------------------------- FileSeek 移动档案指标位置 ----------------------------------------------------------------------------- Unit SysUtils 函数原型 function FileSeek(Handle, Offset, Origin: Integer): Integer; 说明 Origin=0读/写指标由档案开头算起. Origin=1读/写指标由目前位置算起. Origin=2读/写指标移动到档案结束处. **** 功能与Dos Int 21h 插断 42h 的功能相同. 失败传回-1. 范例 procedure TForm1.Button1Click(Sender: TObject); var FileHandle : Integer; FileName : String; Buffer : PChar; S : String; ReadBytes : Integer; begin FileName:='c:\delphi_test\abc.ttt'; S:='1234567890'; if FileExists(FileName) then FileHandle := FileOpen(FileName, fmOpenReadWrite) else FileHandle := FileCreate(FileName); if FileHandle < 0 then Begin MessageDlg('开档失败', mtInformation, [mbOk], 0); Exit; End; GetMem(Buffer, 100); try StrPCopy(Buffer, S); FileWrite(FileHandle,Buffer^,10); FileSeek(FileHandle,4,0); ReadBytes:=FileRead(FileHandle, Buffer^, 100); Buffer[ReadBytes]:=#0; Label1.Caption:=IntToStr(ReadBytes)+' '+ StrPas(Buffer); finally FreeMem(Buffer); end; FileClose(FileHandle); end;结果 存档後abc.ttt共有1234567890等十个Bytes. 从第五位元开始读取,共读取六个位元. 567890 (位移是从0开始算起)procedure TForm1.Button1Click(Sender: TObject);var iFileHandle: Integer; iFileLength: Integer; iBytesRead: Integer; Buffer: PChar; i: Integer begin if OpenDialog1.Execute then begin try iFileHandle := FileOpen(OpenDialog1.FileName, fmOpenRead); iFileLength := FileSeek(iFileHandle,0,2); FileSeek(iFileHandle,0,0); Buffer := PChar(AllocMem(iFileLength + 1)); iBytesRead = FileRead(iFileHandle, Buffer, iFileLength); FileClose(iFileHandle); for i := 0 to iBytesRead-1 do begin StringGrid1.RowCount := StringGrid1.RowCount + 1; StringGrid1.Cells[1,i+1] := Buffer[i]; StringGrid1.Cells[2,i+1] := IntToStr(Integer(Buffer[i])); end; finally FreeMem(Buffer); end; end; end; ##FileOpen, FileSeek, FileRead Example ----------------------------------------------------------------------------- FileGetAttr 档案属性 ----------------------------------------------------------------------------- Unit SysUtils 函数原型 function FileGetAttr(const FileName: string): Integer; 说明 faReadOnly = $00000001; faHidden = $00000002; faSysFile = $00000004; faVolumeID = $00000008; faDirectory = $00000010; faArchive = $00000020; faAnyFile = $0000003F; 范例 procedure TForm1.Button1Click(Sender: TObject); var S: String; begin S:=IntToStr(FileGetAttr('c:\delphi_d\delphi_help1.txt')); Label1.Caption := S; end; ----------------------------------------------------------------------------- FileSetAttr 设定档案属性 ----------------------------------------------------------------------------- Unit SysUtils 函数原型 function FileSetAttr(const FileName: string; Attr: Integer): Integer; 说明 设定成功传回0 ----------------------------------------------------------------------------- FindClose 结束FindFirst/FindNext ----------------------------------------------------------------------------- procedure TForm1.Button1Click(Sender: TObject);var sr: TSearchRec; FileAttrs: Integer; begin StringGrid1.RowCount := 1; if CheckBox1.Checked then FileAttrs := faReadOnly else FileAttrs := 0; if CheckBox2.Checked then FileAttrs := FileAttrs + faHidden; if CheckBox3.Checked then FileAttrs := FileAttrs + faSysFile; if CheckBox4.Checked then FileAttrs := FileAttrs + faVolumeID; if CheckBox5.Checked then FileAttrs := FileAttrs + faDirectory; if CheckBox6.Checked then FileAttrs := FileAttrs + faArchive; if CheckBox7.Checked then FileAttrs := FileAttrs + faAnyFile; if FindFirst(Edit1.Text, FileAttrs, sr) = 0 then begin with StringGrid1 do begin if (sr.Attr and FileAttrs) = sr.Attr then begin Cells[1,RowCount-1] := sr.Name; Cells[2,RowCount-1] := IntToStr(sr.Size); end; while FindNext(sr) = 0 do begin if (sr.Attr and FileAttrs) = sr.Attr then begin RowCount := RowCount + 1; Cells[1, RowCount-1] := sr.Name; Cells[2, RowCount-1] := IntToStr(sr.Size); end; end; FindClose(sr); end; end; end; ##FindFirst, FindNext, FindClose Example
-----------------------------------------------------------------------------
Unit SysUtils
函数原型 function FileOpen(const FileName: string; Mode:
Integer):Integer;
**** 开档失败传回-1.
说明 以下有关档案读取都属低阶,如Dos Int 21h中有关档案的部
分.
fmOpenRead = $0000;
fmOpenWrite = $0001;
fmOpenReadWrite = $0002;
fmShareCompat = $0000;
fmShareExclusive = $0010;
fmShareDenyWrite = $0020;
fmShareDenyRead = $0030;
fmShareDenyNone = $0040; fmOpenRead Open for read access only.
FmOpenWrite Open for write access only.
FmOpenReadWrite Open for read and write access.
fmShareCompat Compatible with the way FCBs are
opened.
fmShareExclusive Read and write access is denied.
fmShareDenyWrite Write access is denied.
fmShareDenyRead Read access is denied.
fmShareDenyNone Allows full access for others.
范例
procedure OpenForShare(const FileName: String);
var
FileHandle : Integer;
begin
FileHandle := FileOpen(FileName, fmOpenWrite or fmShareDenyNone);
if FileHandle > 0 then
{valid file handle}
else
{Open error: FileHandle = negative DOS error code}
end;
范例
procedure TForm1.Button1Click(Sender: TObject);
var
iFileHandle: Integer;
iFileLength: Integer;
iBytesRead: Integer;
Buffer: PChar;
i: Integer
begin
if OpenDialog1.Execute then
begin
try
iFileHandle := FileOpen(OpenDialog1.FileName, fmOpenRead);
iFileLength := FileSeek(iFileHandle,0,2);
FileSeek(iFileHandle,0,0);
Buffer := PChar(AllocMem(iFileLength + 1));
iBytesRead = FileRead(iFileHandle, Buffer, iFileLength);
Fil
eClose(iFileHandle);
for i := 0 to iBytesRead-1 do
begin
StringGrid1.RowCount := StringGrid1.RowCount + 1;
StringGrid1.Cells[1,i+1] := Buffer[i];
StringGrid1.Cells[2,i+1] := IntToStr(Integer(Buffer[i]));
end;
finally
FreeMem(Buffer);
end;
end;
end;
##FileOpen, FileSeek, FileRead Example
-----------------------------------------------------------------------------
FileCreate 建档
-----------------------------------------------------------------------------
Unit SysUtils
函数原型 function FileCreate(const FileName: string): Integer;范例
procedure TForm1.Button1Click(Sender: TObject);
var
BackupName: string;
FileHandle: Integer;
StringLen: Integer;
X: Integer;
Y: Integer;
begin
if SaveDialog1.Execute then
begin
if FileExists(SaveDialog1.FileName) then
begin
BackupName := ExtractFileName(SaveDialog1.FileName);
BackupName := ChangeFileExt(BackupName, '.BAK');
if not RenameFile(SaveDialog1.FileName, BackupName) then raise Exception.Create('Unable to create backup file.');
end;
FileHandle := FileCreate(SaveDialog1.FileName);
{ Write out the number of rows and columns in the grid. }
FileWrite(FileHandle,
StringGrid1.ColCount, SizeOf(StringGrid1.ColCount));
FileWrite(FileHandle,
StringGrid1.RowCount, SizeOf(StringGrid1.RowCount));
for X := 0 to StringGrid1.ColCount ? 1 do
begin for Y := 0 to StringGrid1.RowCount ? 1 do
begin
{ Write out the length of each string, followed by the string itself. }
StringLen := Length(StringGrid1.Cells[X,Y]);
FileWrite(FileHandle, StringLen, SizeOf(StringLen));
FileWrite(FileHandle,
StringGrid1.Cells[X,Y], Length(StringGrid1.Cells[X,Y]);
end;
end;
FileClose(FileHandle);
end;end;
##FileExists, RenameFile, FileCreate, FileWrite, FileClose, ExtractFileName Example
-----------------------------------------------------------------------------
FileClose 关档
-----------------------------------------------------------------------------
Unit SysUtils
函数原型 procedure FileClose(Handle: Integer);
范例
procedure TForm1.Button1Click(Sender: TObject);
var
BackupName: string;
FileHandle: Integer;
StringLen: Integer;
X: Integer;
Y: Integer;
begin
if SaveDialog1.Execute then
begin
if FileExists(SaveDialog1.FileName) then
begin
BackupName := ExtractFileName(SaveDialog1.FileName);
BackupName := ChangeFileExt(BackupName, '.BAK');
if not RenameFile(SaveDialog1.FileName, BackupName) then
raise Exception.Create('Unable to create backup file.');
end;
FileHandl
e := FileCreate(SaveDialog1.FileName);
{ Write out the number of rows and columns in the grid. }
FileWrite(FileHandle,
StringGrid1.ColCount, SizeOf(StringGrid1.ColCount));
FileWrite(FileHandle,
StringGrid1.RowCount, SizeOf(StringGrid1.RowCount));
for X := 0 to StringGrid1.ColCount ? 1 do
begin
for Y := 0 to StringGrid1.RowCount ? 1 do
begin
{ Write out the length of each string, followed by the string itself. }
StringLen := Length(StringGrid1.Cells[X,Y]);
FileWrite(FileHandle, StringLen, SizeOf(StringLen));
FileWrite(FileHandle,
StringGrid1.Cells[X,Y], Length(StringGrid1.Cells[X,Y]);
end;
end;
FileClose(FileHandle);
end;
end;
##FileExists, RenameFile, FileCreate, FileWrite, FileClose, ExtractFileName Example============================================
**** 它是以Handle为叁数.
============================================
FileRead 读取档案
-----------------------------------------------------------------------------
Unit SysUtils
函数原型 function FileRead(Handle: Integer; var Buffer; Count: Integer):Integer;
范例
procedure TForm1.Button1Click(Sender: TObject);var
iFileHandle: Integer;
iFileLength: Integer;
iBytesRead: Integer;
Buffer: PChar;
i: Integer
begin
if OpenDialog1.Execute then
begin
try
iFileHandle := FileOpen(OpenDialog1.FileName, fmOpenRead);
iFileLength := FileSeek(iFileHandle,0,2);
FileSeek(iFileHandle,0,0);
Buffer := PChar(AllocMem(iFileLength + 1));
iBytesRead = FileRead(iFileHandle, Buffer, iFileLength);
FileClose(iFileHandle);
for i := 0 to iBytesRead-1 do
begin
StringGrid1.RowCount := StringGrid1.RowCount + 1;
StringGrid1.Cells[1,i+1] := Buffer[i];
StringGrid1.Cells[2,i+1] := IntToStr(Integer(Buffer[i]));
end;
finally
FreeMem(Buffer);
end;
end;
end;
##FileOpen, FileSeek, FileRead Example
-----------------------------------------------------------------------------
Unit SysUtils
函数原型 function FileWrite(Handle: Integer; const Buffer; Count: Integer): Integer;
范例
procedure TForm1.Button1Click(Sender: TObject);
var
BackupName: string;
FileHandle: Integer;
StringLen: Integer;
X: Integer;
Y: Integer;
begin
if SaveDialog1.Execute then
begin
if FileExists(SaveDialog1.FileName) then
begin
BackupName := ExtractFileName(SaveDialog1.FileName);
BackupName := ChangeFileExt(BackupName, '.BAK');
if not RenameFile(SaveDialog1.FileName, BackupName) then
raise Exception.Create('Unable to create backup file.');
end;
FileHandle := FileCreate(SaveDialog1.FileName);
{ Write out the number of rows and columns in the grid. }
FileWrite(FileHandle,
StringGrid1.ColCount, SizeOf(StringGrid1.ColCount));
FileWrite(FileHandle,
StringGrid1.RowCount, SizeOf(StringGrid1.RowCount));
for X := 0 to StringGrid1.ColCount do
begin
for Y := 0 to StringGrid1.RowCount do
begin
{ Write out the length of each string, followed by the string itself. }
StringLen := Length(StringGrid1.Cells[X,Y]);
FileWrite(FileHandle, StringLen, SizeOf(StringLen));
FileWrite(FileHandle,
StringGrid1.Cells[X,Y], Length(StringGrid1.Cells[X,Y]);//?????????/
end;
end;
FileClose(FileHandle);
end;
end;
##FileExists, RenameFile, FileCreate, FileWrite, FileClose, ExtractFileName Example
-----------------------------------------------------------------------------
FileSeek 移动档案指标位置
-----------------------------------------------------------------------------
Unit SysUtils
函数原型 function FileSeek(Handle, Offset, Origin: Integer): Integer;
说明 Origin=0读/写指标由档案开头算起.
Origin=1读/写指标由目前位置算起.
Origin=2读/写指标移动到档案结束处.
**** 功能与Dos Int 21h 插断 42h 的功能相同.
失败传回-1.
范例 procedure TForm1.Button1Click(Sender: TObject);
var
FileHandle : Integer;
FileName : String;
Buffer : PChar;
S : String;
ReadBytes : Integer;
begin
FileName:='c:\delphi_test\abc.ttt';
S:='1234567890';
if FileExists(FileName) then
FileHandle := FileOpen(FileName, fmOpenReadWrite)
else
FileHandle := FileCreate(FileName);
if FileHandle < 0 then
Begin
MessageDlg('开档失败', mtInformation, [mbOk], 0);
Exit;
End; GetMem(Buffer, 100);
try
StrPCopy(Buffer, S);
FileWrite(FileHandle,Buffer^,10);
FileSeek(FileHandle,4,0);
ReadBytes:=FileRead(FileHandle, Buffer^, 100);
Buffer[ReadBytes]:=#0;
Label1.Caption:=IntToStr(ReadBytes)+' '+
StrPas(Buffer);
finally
FreeMem(Buffer);
end; FileClose(FileHandle);
end;结果 存档後abc.ttt共有1234567890等十个Bytes.
从第五位元开始读取,共读取六个位元.
567890
(位移是从0开始算起)procedure TForm1.Button1Click(Sender: TObject);var
iFileHandle: Integer;
iFileLength: Integer;
iBytesRead: Integer;
Buffer: PChar;
i: Integer
begin
if OpenDialog1.Execute then
begin
try
iFileHandle := FileOpen(OpenDialog1.FileName, fmOpenRead);
iFileLength := FileSeek(iFileHandle,0,2);
FileSeek(iFileHandle,0,0);
Buffer := PChar(AllocMem(iFileLength + 1));
iBytesRead = FileRead(iFileHandle, Buffer, iFileLength);
FileClose(iFileHandle);
for i := 0 to iBytesRead-1 do
begin
StringGrid1.RowCount := StringGrid1.RowCount + 1;
StringGrid1.Cells[1,i+1] := Buffer[i];
StringGrid1.Cells[2,i+1] := IntToStr(Integer(Buffer[i]));
end;
finally
FreeMem(Buffer);
end;
end;
end;
##FileOpen, FileSeek, FileRead Example
-----------------------------------------------------------------------------
FileGetAttr 档案属性
-----------------------------------------------------------------------------
Unit SysUtils
函数原型 function FileGetAttr(const FileName: string): Integer;
说明 faReadOnly = $00000001;
faHidden = $00000002;
faSysFile = $00000004;
faVolumeID = $00000008;
faDirectory = $00000010;
faArchive = $00000020;
faAnyFile = $0000003F;
范例 procedure TForm1.Button1Click(Sender: TObject);
var
S: String;
begin
S:=IntToStr(FileGetAttr('c:\delphi_d\delphi_help1.txt'));
Label1.Caption := S;
end;
-----------------------------------------------------------------------------
FileSetAttr 设定档案属性
-----------------------------------------------------------------------------
Unit SysUtils
函数原型 function FileSetAttr(const FileName: string; Attr: Integer):
Integer;
说明 设定成功传回0
-----------------------------------------------------------------------------
FindClose 结束FindFirst/FindNext
-----------------------------------------------------------------------------
procedure TForm1.Button1Click(Sender: TObject);var
sr: TSearchRec;
FileAttrs: Integer;
begin
StringGrid1.RowCount := 1;
if CheckBox1.Checked then
FileAttrs := faReadOnly
else
FileAttrs := 0;
if CheckBox2.Checked then
FileAttrs := FileAttrs + faHidden;
if CheckBox3.Checked then
FileAttrs := FileAttrs + faSysFile;
if CheckBox4.Checked then
FileAttrs := FileAttrs + faVolumeID;
if CheckBox5.Checked then FileAttrs := FileAttrs + faDirectory;
if CheckBox6.Checked then
FileAttrs := FileAttrs + faArchive;
if CheckBox7.Checked then FileAttrs := FileAttrs + faAnyFile; if FindFirst(Edit1.Text, FileAttrs, sr) = 0 then begin
with StringGrid1 do
begin
if (sr.Attr and FileAttrs) = sr.Attr then
begin
Cells[1,RowCount-1] := sr.Name;
Cells[2,RowCount-1] := IntToStr(sr.Size);
end;
while FindNext(sr) = 0 do
begin
if (sr.Attr and FileAttrs) = sr.Attr then
begin
RowCount := RowCount + 1;
Cells[1, RowCount-1] := sr.Name; Cells[2, RowCount-1] := IntToStr(sr.Size);
end;
end;
FindClose(sr);
end;
end;
end;
##FindFirst, FindNext, FindClose Example
fmopenreadandwrite是说当你打开这个文件时允许进行读写操作,
fmopenwrite是说,只写方式打开,你打开后不予许其他程序再读取该文件
fmopenread是只读模式,只允许读取,不允许修改
我打开文件的时候,用的标志如上。但是有时候还是会出现:“ 另一个程序正在使用此文件,进程无法访问”。写文件我是专门放在一个类里面进行管理的,不应该出现文件访问冲突才对啊。
fmOpenWrite :以只写方式打开指定文件
fmOpenReadWrite:以写写方式打开指定文件
共享模式: fmShareExclusive:不允许别的程序以任何方式打开该文件
fmShareDenyWrite:不允许别的程序以写方式打开该文件
fmShareDenyRead :不允许别的程序以读方式打开该文件
fmShareDenyNone :别的程序可以以任何方式打开该文件