How do I use JQuery to detect if a file input has a file selected? [closed]

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Closed 8 years ago.

开发者_开发技巧 Improve this question

And then alert the file name?

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This should suffice:

alert($('#your_input_box').val());

A file selection box is just an input box, from what I can tell. Read more from this question: jQuery: get the file name selected from <input type="file" />.

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To detect if a file was selected, you can find out the length of the file input

$("#bCheck").click(function() { // bCheck is a input type button
    var fileName = $("#file1").val();

    if(fileName) { // returns true if the string is not empty
        alert(fileName + " was selected");
    } else { // no file was selected
        alert("no file selected");
    }
});