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c# 读写文件操作,高分求答案,急

所属目录：Java | 类型：技术问答 | 时间：2007-05-21

问题：

我要用c# 写个小东西 ,打开一个文本,然后对文本里面的内容操作,例如 rere(ere)rerer_erere
rere )ere
把 ")" 右边的文字变大写,并且把")" 符号删除,谢谢.

· 网友精彩回答：

发表者：jimu8130

http://www.programfan.com/article/showarticle.asp?id=2210
http://www.programfan.com/article/showarticle.asp?id=1992
看下这个咯

发表者：brando_beat

是很简单的、使用indexof和toupper就可以出来了

发表者：daishengs

<%@ page language="c#" codebehind="opertxt.aspx.cs" autoeventwireup="false" inherits="commonfunction.opertxt" %>
<!doctype html public "-//w3c//dtd html 4.0 transitional//en" >
<html>
<head>
<title>opertxt</title>
<meta name="generator" content="microsoft visual studio 7.0">
<meta name="code_language" content="c#">
<meta name="vs_defaultclientscript" content="javascript">
<meta name="vs_targetschema" content="http://schemas.microsoft.com/intellisense/ie5">
</head>
<body ms_positioning="gridlayout">
<form id="opertxt" method="post" runat="server" enctype="multipart/form-data">
<font face="宋体">
<asp:textbox id="txtcontent" style="z-index: 101; left: 40px; position: absolute; top: 20px" runat="server" textmode="multiline" height="429px" width="326px"></asp:textbox>
<asp:button id="btnread" style="z-index: 102; left: 395px; position: absolute; top: 82px" runat="server" width="53px" text="读取"></asp:button>
<asp:button id="btnrepaire" style="z-index: 103; left: 459px; position: absolute; top: 83px" runat="server" width="52px" text="更改"></asp:button>
<input id="filepath" style="z-index: 105; left: 396px; position: absolute; top: 46px" type="file" name="file1" runat="server"></font>
</form>
</body>
</html>

using system;
using system.collections;
using system.componentmodel;
using system.data;
using system.drawing;
using system.web;
using system.web.sessionstate;
using system.web.ui;
using system.web.ui.webcontrols;
using system.web.ui.htmlcontrols;
using system.text;
using system.io;
namespace commonfunction
{
/// <summary>
/// opertxt 的摘要说明。
/// </summary>
public class opertxt : system.web.ui.page
{
protected system.web.ui.webcontrols.textbox txtcontent;
protected system.web.ui.webcontrols.button btnread;
protected system.web.ui.htmlcontrols.htmlinputfile filepath;
protected string txtfilepath,fileextname;
protected system.web.ui.webcontrols.button btnrepaire;

private void page_load(object sender, system.eventargs e)
{
// 在此处放置用户代码以初始化页面
}

#region web form designer generated code
override protected void oninit(eventargs e)
{
//
// codegen：该调用是 asp.net web 窗体设计器所必需的。
//
initializecomponent();
base.oninit(e);
}

/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void initializecomponent()
{
this.btnread.click += new system.eventhandler(this.btnread_click);
this.btnrepaire.click += new system.eventhandler(this.btnrepaire_click);
this.load += new system.eventhandler(this.page_load);

}
#endregion

private void btnread_click(object sender, system.eventargs e)
{
if(filepath.postedfile.filename != "")
{
txtfilepath =filepath.postedfile.filename;
fileextname = txtfilepath.substring(txtfilepath.lastindexof(".")+1,3);

if(fileextname !="txt" && fileextname != "txt")
{
response.write("请选择文本文件");
}
else
{
streamreader filestream = new streamreader(txtfilepath,encoding.default);
txtcontent.text = filestream.readtoend();
filestream.close();
}
}
}

private void btnrepaire_click(object sender, system.eventargs e)
{
if(filepath.postedfile.filename != "")
{
txtfilepath =filepath.postedfile.filename;
fileextname = txtfilepath.substring(txtfilepath.lastindexof(".")+1,3);

if(fileextname !="txt" && fileextname != "txt")
{
response.write("请选择文本文件");
}
else
{
streamwriter filewrite = new streamwriter(txtfilepath,false,encoding.default);
filewrite.write(txtcontent.text);
filewrite.close();

}
}
}

}
}

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