Forum Discussion

msalvador's avatar
msalvador
Frequent Contributor
5 years ago

replace a string in a file

Hi guys, I need to find a string in a file and replace with another string I find: web.admin.user=admin and I want to chane with: web.admin.user=pippo a snippet: function FindandReplaceTextValue(Filen...
  • msalvador's avatar
    msalvador
    5 years ago

    Here the solution:

    function FindandReplaceTextValue(Filename, OldStr, NewStr) //Find a text in a file and replace it
    {
      var sPath = Filename;

      // Opens the created file for reading
      var myFile = aqFile.ReadWholeTextFile(sPath, aqFile.ctANSI);
     
        if (aqString.Find(myFile,OldStr)!= -1)
        {
          myFile = aqString.replace(myFile, OldStr, NewStr); //Replace string
          aqFile.WriteToTextFile(Filename, myFile, aqFile.ctANSI, true);
        }
    }
tristaanogre's avatar
tristaanogre
Esteemed Contributor

For readability, repasting your function formatted better.

 

function FindandReplaceTextValue(Filename, OldStr, NewStr) //Find a text in a file and replace it {
    var myFile = aqFile.OpenTextFile(Filename, aqFile.faReadWrite , aqFile.ctUTF8);
    var Str; myFile.SetPosition(1,1);
    Str = myFile.ReadLine(); // Reads text lines from the file and posts them to the test log
    while(! myFile.IsEndOfFile()) {
        Str = myFile.ReadLine();
        if (Str == OldStr) {
            myFile.Cursor--;
            myFile.r
            myFile.Write(NewStr) //Replace the string
        }
        myFile.Cursor++;
    }
    myFile.Close();
}

That said.... rather than reading the file one line at a time and then trying to replace the line, you could read the whole text file in all at once using aqFile.ReadWholeTextFile.  This will read the whole file in as a single string.  You can then simply use the aqString.Replace method to replace the desired string and then save the file back down, overwriting the existing file.

 

msalvador's avatar
msalvador
Frequent Contributor
5 years ago

Here the solution:

function FindandReplaceTextValue(Filename, OldStr, NewStr) //Find a text in a file and replace it
{
  var sPath = Filename;

  // Opens the created file for reading
  var myFile = aqFile.ReadWholeTextFile(sPath, aqFile.ctANSI);
 
    if (aqString.Find(myFile,OldStr)!= -1)
    {
      myFile = aqString.replace(myFile, OldStr, NewStr); //Replace string
      aqFile.WriteToTextFile(Filename, myFile, aqFile.ctANSI, true);
    }
}
  • sonya_m's avatar
    sonya_m
    SmartBear Alumni (Retired)
    5 years ago

    Thank you for sharing msalvador