Hi,
I have looked in many places on the web on how to write to .dat file with javascript but haven't found a solution. For example, say that you want write some english study to a .dat file. Here is the code so far, the write function is near the bottom. The
problem with the code is that whenever I press the button that says 'Write English Study', the app always crashes, or at least closes. Note that the html and javascript is all in one.
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<script src="/study/study.js"></script>
<title></title>
</head>
<body>
<h1>Study</h1>
<p>The devotion of time and attention to gaining knowledge of an
academic subject, especially by means of books.</p>
<h2>English</h2>
<p>You will need to create an English Study File to save your study.</p>
<button id="createEnglish" onclick="createEnglish()">Create</button>
<script type="text/javascript">
function createEnglish() {
Windows.Storage.KnownFolders.picturesLibrary.createFileAsync("English Study.dat", Windows.Storage.CreationCollisionOption.failIfExists).done(
function message() {
(new Windows.UI.Popups.MessageDialog("The file English Study.dat was created successfully", "Message:")).showAsync().done();
},
function (error) {
(new Windows.UI.Popups.MessageDialog("The following error occured: " + error, "Message:")).showAsync().done();
});
}
</script>
<h3>You can type in your English Study below:</h3>
<textarea rows="20" cols="100" id="englishArea" name="englishArea"></textarea>
<button id="writeEnglishButton" onclick="writeEnglish()">Write English Study</button>
<!--This is where the write to .dat file function is-->
<script type="text/javascript">
function writeEnglish() {
var English_Study_File = Windows.Storage.KnownFolders.picturesLibrary.getFileAsync("English Study.dat");
if (English_Study_File = true) {
var textAreaEnglish = document.getElementById("englishArea");
var englishContent = textAreaEnglish.innerText;
var englishFile = Windows.Storage.KnownFolders.picturesLibrary("English Study.dat");
if (englishContent !== "") {
Windows.Storage.FileIO.appendTextAsync(englishFile, englishContent).done(function () {
(new Windows.UI.Popups.MessageDialog("The following text was written to 'English Study.dat':\n" + englishContent, "Message:")).showAsync().done();
},
function (error) {
(new Windows.UI.Popups.MessageDialog("The file 'English Study.dat' does not exist; please create using the button above.", "Message:")).showAsync().done();
});
} else {
(new Windows.UI.Popups.MessageDialog("The text box is empty, please write something and then click 'Write English Study' again.", "Message:")).showAsync().done();
}
}
}
</script>
</body>
</html>
Thanks in advance.
