Append info to file

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GMKai
Posts: 123
Joined: Mon Feb 15, 2010 10:58 am

Append info to file

Post by GMKai »

Code: Select all

Function p_WriteLog(logline)
    Local str$ = ""
    ;OpenFile(1, "t:test.log",#MODE_WRITE)
    OpenFile(1, "t:test.log",#MODE_READWRITE)
    Seek(1,#EOF)
    str$ = logline.."\n"
    WriteString(1, str$)
    CloseFile(1)
EndFunction

DeleteFile("t:test.log")
p_WriteLog("ABC")
p_WriteLog("Test2") 
With the snippet above the logfile gets created and information can be appended.
Why does this not work with mode "#MODE_WRITE"?

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airsoftsoftwair
Posts: 4246
Joined: Fri Feb 12, 2010 2:33 pm
Location: Germany
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Re: Append info to file

Post by airsoftsoftwair »

#MODE_WRITE will always create a blank file. If you want to modify an existing file, you have to use #MODE_READWRITE, even if you don't want to read but just append.

amyren
Posts: 107
Joined: Thu May 02, 2019 11:53 am

Re: Append info to file

Post by amyren »

airsoftsoftwair wrote:
Sat Feb 02, 2019 4:00 pm
#MODE_WRITE will always create a blank file. If you want to modify an existing file, you have to use #MODE_READWRITE, even if you don't want to read but just append.
Perhaps that could be explained in the OpenFile docs as well, if you care to add it at next update?
Or is it described elsewhere?

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