http://*.com/questions/634587/delphi-why-do-i-sometimes-get-an-i-o-error-103-with-this-code
I don't see what is wrong with automatic retry. I don't see that you can do anything else.
If some other process is reading the file, then your Append/Rewrite will fail.
假如某个其他进程正在读取这个问题,这时你做Append Rewite 操作的话就会出错。
And since the file is a log, there is a good chance that something, such as a log viewer or a text editor, will be reading it at the instant you try to open it.
Try opening the file a few times with a delay in-between attempts before failing definitively.
在明确失败前,试试打开以一定的间隔打开这个文件几次。
You could use an exponential backoff if you wanted to be fancy.
你可以用一个变量控制。
try
ReWrite(MyFileHandler); // This sometimes fails
except
ReWrite(MyFileHandler); // When prior fails, this runs OK
end;
用户环境:
使用该软件已经快8年了,最近安装了360卫士和杀毒。
保存时提示该错误。
其他:
http://*.com/questions/22026948/how-do-i-solve-i-o-error-103-in-delphi
http://*.com/questions/16287983/why-do-i-get-i-o-error-32-even-though-the-file-isnt-open-in-any-other-program
http://mc-computing.com/languages/delphi/delphifileio.htm
测试:
procedure TForm1.Button1Click(Sender: TObject);
var
F,n: TextFile;
const
filestr = 's:\test.txt';
begin
AssignFile(f, filestr);
Append(f);// 不存在这个文件时,报File not found;存在时 无报错。
end
procedure TForm1.Button1Click(Sender: TObject);
var
F,n: TextFile;
const
filestr = 's:\test.txt';
begin
// AssignFile(f, filestr);//无这行 报I/O error 102
Append(f);
// Rewrite(f);
// Writeln(f, 'abcs:\');
// CloseFile(f);
end;
procedure TForm1.Button1Click(Sender: TObject);
var
F,n: TextFile;
const
filestr = 's:\test.txt';
begin
AssignFile(f, filestr);//无这行 报I/O error 102
Append(f);
Append(f);//第二次时点击按钮时 报 I/O error 32 资源管理器里删除该文件的话,提示 已经被其他程序打开 end;
procedure TForm1.Button1Click(Sender: TObject);
var
F,n: TextFile;
const
filestr = 's:\test.txt';
begin
AssignFile(f, filestr);
// Append(f);//无这行,报 I/O error 103
CloseFile(f);
end;
procedure TForm1.Button1Click(Sender: TObject);
var
F,n: TextFile;
const
filestr = 's:\test.txt';
begin
AssignFile(f, filestr);
Append(f); Writeln(f, 'abcs:\');
CloseFile(n);//n变量 未关联文件时,报103
end;
可能的原因:
1、Append时,