The intricacies of the Jscript ReadLine() function

I am trying to figure out how to read the complete content of a .txt file using JavaScript. I know that ReadLine() can be used to read a specific line from a file, but I need a method that will allow me to read the entire contents of the file. I have searched online extensively for a solution without any luck.

Below is the code I am currently using:

var ForReading = 1;
var TristateUseDefault = -2;
var fso = new ActiveXObject("Scripting.FileSystemObject");
var newFile = fso.OpenTextFile(sFileName, ForReading, true, TristateUseDefault);
var importTXT = newFile.ReadLine();

As it stands, this code only reads the first line of the .txt file into the importTXT variable. However, my goal is to retrieve the entire file content and store it in importTXT.

If anyone has any suggestions or solutions, I would greatly appreciate it.

javascriptjscript-10

Answer №1

To retrieve all the data, you can utilize the ReadAll method:

var txtData = newFile.ReadAll();

Remember to finalize the stream once you are finished using it.

Answer №2

Check out this link for more information: ReadAll (official Microsoft documentation)

I came across an example that I thought was lacking - it didn't include closing the file, so I made some modifications to the code from the official Microsoft page:

function ReadAllTextFile(filename)
{
    var ForReading = 1;
    var fso = new ActiveXObject("Scripting.FileSystemObject");

    // Open the file for input.
    var f = fso.OpenTextFile(filename, ForReading);

    // Read from the file.
    var text = (f.AtEndOfStream)?"":f.ReadAll(); // reading operation
    f.Close();
    return text;
}
var importTXT = ReadAllTextFile(sFileName);

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