如何从JavaScript中的Txt文件中读取文本 [英] How Do I Read Text From Txt File In JavaScript

问题描述

你好，



我正在建立一些网页，我有一个问题。在我的HTML网页上有一个标签和一个按钮（我正在使用此标签<按钮>），按钮点击我应该调用一些javascript函数，它将读取counter.txt文件并将数据发送到标签..



喜欢这个：

in counter.txt我的号码是151

点击按钮

label.text = 151



谢谢！

Hello,

i am building right now some web page and i have one problem. In my HTML web page there is one label and one button ("i am using this tag <button>"), on button click i should call some javascript function that will read counter.txt file and send data to label..

Like this:
in counter.txt i have number 151
when click on button
label.text = 151

Thanks!

推荐答案

<script type="text/javascript">
function readSingleFile(evt) {
    //Retrieve the first (and only!) File from the FileList object
    var f = evt.target.files[0];
    if (f) {
      var r = new FileReader();
      r.onload = function(e) {
          var contents = e.target.result;
          document.getElementById(&quot;lbl&quot;).innerHTML=contents;
      };
      r.readAsText(f);
    } else {
      alert(&quot;Failed to load file&quot;);
    }
  }
document.getElementById(&#39;fileinput&#39;).addEventListener(&#39;change&#39;, readSingleFile, true);
</script>

Try this, it will work.

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