Delete Line from text File

[Jat421]

Hi,

I have a function that reads a line from a text file. Now the issue I am having is that once that line is read I want to delete that line from the file. Below is what I have so far, but it doesn't seem to work. I am using the WinAPI because I want to lock the text file while reading it. Thanks for any help!!

Func ReadWrite()            
    $tBuffer = DllStructCreate("byte[16]")
    $hFile = _WinAPI_CreateFile($File1, 2, 6, 0)
    _WinAPI_SetFilePointer($hFile, 0)
    _WinAPI_ReadFile($hFile, DllStructGetPtr($tBuffer), 16, $nBytes)    
    
    
    $sText = ""
    $wBuffer = DllStructCreate("byte[" & StringLen($sText) & "]")
    DllStructSetData($wBuffer, 1, $sText)
    $hFile = _WinAPI_CreateFile($hFile, 2, 6, 0)
    _WinAPI_WriteFile($hFile, DllStructGetPtr($wBuffer), StringLen($sText) , $nBytes)
    
    _WinAPI_CloseHandle($hFile)
    $sText = BinaryToString(DllStructGetData($tBuffer, 1))
    ClipPut($sText)                                         
    $c = @UserName                                          
    $k = _FileWriteLog($File2, " " & $stext & " " & $c)     
    MsgBox(0, "Number is", $sText)                      
EndFunc

The File1 looks like this

1234567891234567
1234567891234568
1234567891234569
1234567891234566
1234567891234562

[wakillon]

See this post it can help you

for doing same thing by another way !

[Jat421]

Hi, Thanks for the link. But I believe I will not be able to pass the handle to that _FileLineDelete() in the UDF. I can probably do it by writing a different function with this UDF but then the text file will not be locked when I am writing to it. I would like to lock the text file while it's been read and written to. Anything else you can suggest. Thanks for your help!!

[wakillon]

Is the _ReplaceStringInFile( ) function could help you ?

[Jat421]

I will give that a try but I have a feeling that might not work. I will I need a WinAPI call to get the handle. Thanks!