if your algo of searching value is very long, you can insert this in your code:
if ((GetTickCount() - openfiletime) >= 5000) than
Break; (or Exit;)
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Question
Wait for a value and if not found in a given time abort.
Hi,
I want to know the best way to for example read a file constantly looking for a value and if the value is not present in 5 seconds then abort.
I have seen something using GetTickCount but i am not sure how to use it.
Thanks.
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Answers
Hi!
You dont say what kind of file and the value expected so... I assume that is a text file and the value to look for is a string.
Is this is not true, simply change the function ValueIsPresentInFile as you wish...
procedure TForm1.Button1Click(Sender
function ValueIsPresentInFile(FileN
var
TheFile: TStringList;
begin
Result:=FALSE;
if NOT FileExists(Filename) then Exit;
TheFile:=TStringList.Creat
try
//Load The File
TheFile.LoadFromFile(Filen
//Test if value exists into:
Result:=( Pos(TheValue,TheFile.Text)
finally
TheFile.Free;
end;
end;
var
StartTime : TTime;
IsPresent : boolean;
begin
//Get the Actual time:
StartTime:=Time;
repeat
IsPresent:=ValueIsPresentI
until IsPresent or ( (Time-StartTime) > StrToTime('00:00:05') );
if IsPresent then ShowMessage('The value is in the file')
else ShowMessage('Sorry, the file does not contain the value for 5 secs...');
end;
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by: -Thespian-Posted on 2005-08-25 at 02:15:59ID: 14750152
U are right about GetTickCount. You ran use such algo (openfiletime: integer):
open file;
openfiletime := GetTickCount();
while (not eof(myfile))
begin
if ((GetTickCount() - openfiletime) >= 5000) than
Break;
searching value.....
end;
close file;