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求教textarea读写txt问题 [复制链接]

johnconner

中级会员

Rank: 3 Rank: 3

电梯直达

楼主

发表于 2013-1-16 18:19:55 |只看该作者 |倒序浏览

请教官网的DEMO右侧选项卡查看代码是如何实现插入回车的？
我用textarea读写txt文件，已经读取出来，可以修改，但是无法换行

如果现在光标在[......]内的任意位置，按回车换行，光标都会跑到[......]之后，在]后闪烁，而换行也没有插入进去，官网demo中的查看code页是如何实现的？

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factory

超级版主

Rank: 8 Rank: 8

沙发

发表于 2013-1-17 09:10:03 |只看该作者

能否将你的页面代码贴一下，重现下问题，我本地看下

johnconner

中级会员

Rank: 3 Rank: 3

板凳

发表于 2013-1-17 10:39:03 |只看该作者

factory 发表于 2013-1-17 09:10
能否将你的页面代码贴一下，重现下问题，我本地看下

页面文件：

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="menuinfo.aspx.cs" Inherits="main_jichu_menuinfo" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>菜单信息</title>
<meta http-equiv="content-type" content="text/html; charset=UTF-8" />
<link href="../../css/demo.css" rel="stylesheet" type="text/css" />
<script src="../../scripts/boot.js" type="text/javascript"></script>
<link href="../../scripts/miniui/themes/blue/skin.css" rel="stylesheet" type="text/css" />
<link href="../../css/general.css" rel="stylesheet" type="text/css" />
</head>
<body>
<table>
<tr>
<td id="label" style ="color:Red; padding-top:10px; width:400px">Menu Manage — 菜单信息</td>
<td><div id="message" style="color:White; width:150px; text-align:center;"></div></td>
</tr>
</table>
<div style="width:100%;">
<div class="mini-toolbar" style="border-bottom:0;padding:0px;">
<table style="width:100%;">
<tr>
<td style="width:100%;">
<%--<a class="mini-button" iconCls="icon-date" onclick="read" plain="true">读取</a>--%>
<input id="combo" class="mini-combobox" style="width:100;" textField="text" valueField="id"
data="url" allowInput="true" onvalidation="read" showNullItem="true" nullItemText="请选择..."/>
<span class="separator"></span>
<a id="save" class="mini-button" iconCls="icon-save"
onclick="write" plain="true">保存</a>
</td>
</tr>
</table>
</div>
</div>
<div class="mini-fit" style="height:100px;">
<textarea id="editor" style="width:100%; height:100%;" class="mini-textarea" vtype="required"></textarea>
</div>
<script type="text/javascript">
var url = [{ id: 1, text: '菜单TXT' }, { id: 2, text: '机组TXT'}, { id: 3, text: '管网TXT'}];
mini.parse();
var textarea = mini.get("editor");
var combo = mini.get("combo");
function read(){
var id = combo.getValue();
var messageid = mini.loading("读取中，请稍后......","Loading");
$.ajax({
url:"menuinfo.ashx?method=read&id="+id,
success:function(text){
mini.hideMessageBox(messageid);
if(text=="error"){
showMessage("数据读取错误");
}
else{
textarea.setValue(text);
}
},
error:function(e,xhr,opt){
mini.hideMessageBox(messageid);
mini.alert("[ "+xhr+" ] — 错误状态："+e.status+"，错误信息："+opt);
}
});
}
function write(){
var json = textarea.getValue();
if(json == ""){
showMessage("数据不能为空");
}
else{
var id = combo.getValue();
var messageid = mini.loading("保存中，请稍后......","Loading");
$.ajax({
url : "menuinfo.ashx?method=write&id="+id,
data : { data : json },
type : "post",
success : function (text){
if(text=="true")
showMessage("保存成功");
else
showMessage("保存失败");
mini.hideMessageBox(messageid);
},
error: function (jqXHR, textStatus, errorThrown) {
mini.hideMessageBox(messageid);
mini.alert(jqXHR.responseText);
}
});
}
}
</script>
</body>
</html>

复制代码

ashx文件：

<%@ WebHandler Language="C#" Class="menuinfo" %>
using System;
using System.Web;
using System.Collections;
using System.IO;
public class menuinfo : IHttpHandler {
String txtPath = "";
public void ProcessRequest (HttpContext context) {
String method = context.Request["method"];
String id = context.Request["id"];
switch (id)
{
case "1":
txtPath = HttpContext.Current.Server.MapPath("../../data/menutree.txt");
break;
case "2":
txtPath = HttpContext.Current.Server.MapPath("../../data/jzcount.txt");
break;
case "3":
txtPath = HttpContext.Current.Server.MapPath("../../data/weizhi.txt");
break;
}
switch (method)
{
case "read" :
this.read(context);
break;
case "write" :
this.write(context);
break;
}
}
public void read(HttpContext context)
{
try
{
FileStream fs = new FileStream(txtPath, FileMode.Open, FileAccess.Read);
//FileStream fs = new FileStream(@tB_PachFileName.Text, FileMode.Open, FileAccess.Read);//读取文件设定
StreamReader m_streamReader = new StreamReader(fs, System.Text.Encoding.GetEncoding("UTF-8"));//设定读写的编码
//使用StreamReader类来读取文件
m_streamReader.BaseStream.Seek(0, SeekOrigin.Begin);
// 从数据流中读取每一行，直到文件的最后一行，并在rTB_Display.Text中显示出内容
//this.rTB_Display.Text = "";
String temp = "";
string strLine = m_streamReader.ReadLine();
while (strLine != null)
{
temp += strLine + "\n";
strLine = m_streamReader.ReadLine();
}
//关闭此StreamReader对象
m_streamReader.Close();
context.Response.Write(temp);
}
catch
{
//抛出异常
context.Response.Write("error");
return;
}
}
public void write(HttpContext context)
{
try
{
String json = context.Request["data"].ToString();
FileStream fs = new FileStream(txtPath, FileMode.Create);
StreamWriter sw = new StreamWriter(fs, System.Text.Encoding.GetEncoding("UTF-8"));
//开始写入
sw.Write(json);
//清空缓冲区
sw.Flush();
//关闭流
sw.Close();
fs.Close();
context.Response.Write("true");
}
catch
{
context.Response.Write("error");
return;
}
}
public bool IsReusable {
get {
return false;
}
}
}