单击按钮时从文本区域下载文本文件

Download a text file from textarea on Button Click

本文关键字：文本 区域 文件 下载 按钮 单击      更新时间：2023-09-26

我正在使用Jquery UI Dialog .在对话框中，有一些文本区域包含一些文本。我需要将该文本保存为文本文件，就像data.txt单击对话框中的按钮一样。

<div id = 'metaDataDialog' title='Meta Data' >
  <textarea id = 'metaText'>
     Some Text
  </textarea>
</div>

这是 jQuery UI 对话框

$("#metaDataDialog").dialog({ //Jquery UI Dialog Intialization
           autoOpen: false, 
           modal: true, 
           width: 400,
           height: 300, 
           buttons: {
              Save: function() {},                   
              Cancel: function() { $(this).dialog( "close" ); }
           },                  
        });

并且当单击save按钮时，我需要在本地机器中保存/下载文本

<html>
<head>
<script src="http://code.jquery.com/jquery-1.10.2.js"></script>

<script>
    $(document).ready(function () {
        function saveTextAsFile() {
            // grab the content of the form field and place it into a variable
            var textToWrite = document.getElementById("content").value;
            //  create a new Blob (html5 magic) that conatins the data from your form feild
            var textFileAsBlob = new Blob([textToWrite], { type: 'text/plain' });
            // Specify the name of the file to be saved
            var fileNameToSaveAs = "myNewFile.txt";
            // Optionally allow the user to choose a file name by providing 
            // an imput field in the HTML and using the collected data here
            // var fileNameToSaveAs = txtFileName.text;
            // create a link for our script to 'click'
            var downloadLink = document.createElement("a");
            //  supply the name of the file (from the var above).
            // you could create the name here but using a var
            // allows more flexability later.
            downloadLink.download = fileNameToSaveAs;
            // provide text for the link. This will be hidden so you
            // can actually use anything you want.
            downloadLink.innerHTML = "My Hidden Link";
            // allow our code to work in webkit & Gecko based browsers
            // without the need for a if / else block.
            window.URL = window.URL || window.webkitURL;
            // Create the link Object.
            downloadLink.href = window.URL.createObjectURL(textFileAsBlob);
            // when link is clicked call a function to remove it from
            // the DOM in case user wants to save a second file.
            downloadLink.onclick = destroyClickedElement;
            // make sure the link is hidden.
            downloadLink.style.display = "none";
            // add the link to the DOM
            document.body.appendChild(downloadLink);
            // click the new link
            downloadLink.click();
        }
        function destroyClickedElement(event) {
            // remove the link from the DOM
            document.body.removeChild(event.target);
        }

        $("#download").click(function (e) {
            e.preventDefault();
            saveTextAsFile();
        });
 });  
</script>
</head>
<body>
    <input type="button" id="download" value="Download" />
   <textarea id="content">In trying to keep this plugin as simple as possible, all four states are always assumed to be present. You should prepare your button image as a single image the width you want your button, and four times the height of the button. All four states should then live in that one image in the same order as the previous list from top to bottom.</textarea>

</body>
</html>
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