html - Is it possible in javascript to read local files in IE? - Stack Overflow

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FileReader allows to read local file in Chrome.

function readMultipleFiles(evt) {
    var files = evt.target.files;

    if (files) {
        for (var i = 0, f; f = files[i]; i++) {
            var r = new FileReader();
            r.onload = (function (f) {
                return function (e) {
                    var contents = e.target.result;
                    document.getElementById("output").innerHTML = contents;
                };
            })(f);
            r.readAsText(f);
        }
    } else {
        alert("Failed to load files");
    }
}
document.getElementById('fileinput').addEventListener('change', readMultipleFiles, false);​

Run example on jsfiddle

But this example does not work in Internet Explorer 9.
Does IE9 support File API?
If yes - what should I do to have ability to read local files in IE9?

FileReader allows to read local file in Chrome.

function readMultipleFiles(evt) {
    var files = evt.target.files;

    if (files) {
        for (var i = 0, f; f = files[i]; i++) {
            var r = new FileReader();
            r.onload = (function (f) {
                return function (e) {
                    var contents = e.target.result;
                    document.getElementById("output").innerHTML = contents;
                };
            })(f);
            r.readAsText(f);
        }
    } else {
        alert("Failed to load files");
    }
}
document.getElementById('fileinput').addEventListener('change', readMultipleFiles, false);​

Run example on jsfiddle

But this example does not work in Internet Explorer 9.
Does IE9 support File API?
If yes - what should I do to have ability to read local files in IE9?

• javascript
• html
• internet-explorer
• internet-explorer-9

Share Improve this question Follow edited Sep 11, 2012 at 6:55 Volodymyr Bezuglyy asked Sep 11, 2012 at 6:53 Volodymyr BezuglyyVolodymyr Bezuglyy 16.8k3333 gold badges106106 silver badges135135 bronze badges

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5 Answers 5

Sorted by: Reset to default 3

You can use ActiveX' FileSystemObject.

var fso = new ActiveXObject("Scripting.FileSystemObject");
var a = fso.CreateTextFile("c:\\testfile.txt", true);
a.WriteLine("This is a test.");
a.Close();

If you make an hypertext application (.hta), you will be able to create the ActiveX object FileSystemObject, which will let you access the local file system.

Generally no. Reading local files is a massive security violation.

Does IE9 support File API?

No, it doesn't.

If yes - what should I do to have ability to read local files in IE9?

Did you mean if no? If so then you could use an ActiveX or just inform the user that this feature of your website is not supported on his browser and allow him the possibility to upload the file to the server.

Seems that FileSystemObject like a hidden monster..

var fso, file, fileName = '/file.txt', fileContents = '';
if (fileName) {
    fso = new ActiveXObject('Scripting.FileSystemObject');
    // don't worry about 'camelCase' typing, works both
    if (fso.fileExists(fileName)) {
        file = fso.openTextFile(fileName, 1);
        fileContents = file.readAll();
        // or loop over lines
        // while (!file.atEndOfStream) {
        //     fileContents += file.readLine();
        // }
        file.close();
    }
}

More info: https://msdn.microsoft./en-us/library/314cz14s(v=vs.85).aspx

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