使用javascript将数据写入本地文本文件 [英] Writing data to a local text file with javascript
问题描述
< form id =我已经创建了一个将内容写入本地机器的文本文件的过程。的AddNew>
< input type =textclass =id>
< input type =textclass =content>
< input type =submitvalue =Add>
< / form>
< script>
$ {
$('#form_addjts')。submit(function(){
writeToFile({
id:$(this).find(' .id')。val(),
content:$(this).find('。content')。val()
});
return false;
} );
函数writeToFile(data){
var fso = new ActiveXObject(Scripting.FileSystemObject);
var fh = fso.OpenTextFile(D:\\data.txt ,8);
fh.WriteLine(data.id +','+ data.content);
fh.Close();
}
});
< / script>
这工作正常,能够将新数据追加到文件中。 b
$ b
但是我想根据我传递的ID更新特定的行内容。
我搜索了很多,但是找不到任何内容。
如何根据ID更新文件中的某一行?
注意: - 我没有使用任何服务器。我有一个html文件(包含所有的功能),我将在本地机器上运行。
我们的HTML: < div id =addnew>
< input type =textid =id>
< input type =textid =content>
< input type =buttonvalue =Addid =submit>
< / div>
< div id =check>
< input type =textid =input>
< input type =buttonvalue =Searchid =search>
< / div>
JS(写入txt文件):
function writeToFile(d1,d2){
var fso = new ActiveXObject(Scripting.FileSystemObject);
var fh = fso.OpenTextFile(data.txt,8,false,0);
fh.WriteLine(d1 +','+ d2);
fh.Close();
}
var submit = document.getElementById(submit);
submit.onclick = function(){
var id = document.getElementById(id).value;
var content = document.getElementById(content)。value;
writeToFile(id,content);
检查特定行:
function readFile(){
var fso = new ActiveXObject(Scripting.FileSystemObject);
var fh = fso.OpenTextFile(data.txt,1,false,0);
var lines =;
while(!fh.AtEndOfStream){
lines + = fh.ReadLine()+\r;
}
fh.Close();
回报行;
}
var search = document.getElementById(search);
search.onclick = function(){
var input = document.getElementById(input)。value;
if(input!=){
var text = readFile();
var lines = text.split(\r);
lines.pop();
var result;
for(var i = 0; i< lines.length; i ++){
if(lines [i] .match(new RegExp(input))){
result =Found :+ lines [i] .split(,)[1];
if(result){alert(result); }
else {alert(input +not found!); }
$ b $放置在 .hta
文件并运行它。测试了W7,IE11。它正在工作。另外,如果你想让我解释一下发生了什么事情,就这么说。
I have created a procedure to write content to a text file in my local machine.
<form id="addnew">
<input type="text" class="id">
<input type="text" class="content">
<input type="submit" value="Add">
</form>
<script>
jQuery(function($) {
$('#form_addjts').submit(function(){
writeToFile({
id: $(this).find('.id').val(),
content: $(this).find('.content').val()
});
return false;
});
function writeToFile(data){
var fso = new ActiveXObject("Scripting.FileSystemObject");
var fh = fso.OpenTextFile("D:\\data.txt", 8);
fh.WriteLine(data.id + ',' + data.content);
fh.Close();
}
});
</script>
This is working fine, and able to append my new data to the file.
But I want to update a particular row CONTENT based on the ID which I am passing.
I searched a lot, but could not find any.
How can update a particular row in the file based on the ID?
Note:- I am not using any server as such. I have a a html file (contains all the functionality) which I will be running on my local machine itself.
解决方案 Our HTML:
<div id="addnew">
<input type="text" id="id">
<input type="text" id="content">
<input type="button" value="Add" id="submit">
</div>
<div id="check">
<input type="text" id="input">
<input type="button" value="Search" id="search">
</div>
JS (writing to the txt file):
function writeToFile(d1, d2){
var fso = new ActiveXObject("Scripting.FileSystemObject");
var fh = fso.OpenTextFile("data.txt", 8, false, 0);
fh.WriteLine(d1 + ',' + d2);
fh.Close();
}
var submit = document.getElementById("submit");
submit.onclick = function () {
var id = document.getElementById("id").value;
var content = document.getElementById("content").value;
writeToFile(id, content);
}
checking a particular row:
function readFile(){
var fso = new ActiveXObject("Scripting.FileSystemObject");
var fh = fso.OpenTextFile("data.txt", 1, false, 0);
var lines = "";
while (!fh.AtEndOfStream) {
lines += fh.ReadLine() + "\r";
}
fh.Close();
return lines;
}
var search = document.getElementById("search");
search.onclick = function () {
var input = document.getElementById("input").value;
if (input != "") {
var text = readFile();
var lines = text.split("\r");
lines.pop();
var result;
for (var i = 0; i < lines.length; i++) {
if (lines[i].match(new RegExp(input))) {
result = "Found: " + lines[i].split(",")[1];
}
}
if (result) { alert(result); }
else { alert(input + " not found!"); }
}
}
Put these inside a .hta
file and run it. Tested on W7, IE11. It's working. Also if you want me to explain what's going on, say so.
这篇关于使用javascript将数据写入本地文本文件的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!