FileStream读写文件【StreamWriter 和 StreamReader】
2008-09-04 10:25
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FileStream对象表示在磁盘或网络路径上指向文件的流。这个类提供了在文件中读写字节的方法,但经常使用StreamReader或StreamWriter执行这些功能。这是因为FileStream类操作的是字节和字节数组,而Stream类操作的是字符数据。字符数据易于使用,但是有些操作,比如随机文件访问(访问文件中间某点的数据),就必须由FileStream对象执行.
其中创建FileStream对象最简单的构造函数如下:
1
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
FileStream file = new FileStream(fileName,FileMode.Member);
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![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
FileStream file = new FileStream(fileName, FileMode.Member, FileAccess.Member);
[align=left]而FileAccess的成员:[/align]
对文件进行不是FileAccess枚举成员指定的操作会导致抛出异常。此属性的作用是,基于用户的身份验证级别改变用户对文件的访问权限。
在FileStream构造函数不使用FileAccess枚举参数的版本中,使用默认值FileAccess. ReadWrite。
FileMode枚举成员,使用每个值会发生什么,取决于指定的文件名是否表示已有的文件。
[align=left]
[/align]FileStream类操作的是字节和字节数组,而Stream类操作的是字符数据
StreamWriter允许将字符和字符串写入文件,它处理底层的转换,向FileStream对象写入数据。StreamReader也类似。
实例:
1
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
using System;
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![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
using System.Data;
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![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
using System.IO;
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![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
using System.Text;
5
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
6
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gif)
/**//// <summary>
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
/// Summary description for FileReadAndWrite
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![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif)
/// </summary>
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![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
public class FileReadAndWrite
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![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
public FileReadAndWrite()
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![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
//
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
// TODO: Add constructor logic here
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
//
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![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
17
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
/**//// <summary>
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
/// 用FileStream写文件
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
/// </summary>
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
/// <param name="str"></param>
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![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
/// <returns></returns>
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
public void FileStreamWriteFile(string str)
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![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
byte[] byData;
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
char[] charData;
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
try
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![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
FileStream nFile = new FileStream("love.txt", FileMode.Create);
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
//获得字符数组
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
charData = str.ToCharArray();
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
//初始化字节数组
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
byData = new byte[charData.Length];
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
//将字符数组转换为正确的字节格式
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
Encoder enc = Encoding.UTF8.GetEncoder();
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
enc.GetBytes(charData, 0, charData.Length,byData,0,true);
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
nFile.Seek(0, SeekOrigin.Begin);
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
nFile.Write(byData, 0, byData.Length);
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![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
catch (Exception ex)
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![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
throw ex;
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![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
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![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
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![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
/**//// <summary>
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
/// FileStream读取文件
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
/// </summary>
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
/// <param name="filePath"></param>
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![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
/// <returns></returns>
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
public string FileStreamReadFile(string filePath)
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![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
byte[] data = new byte[100];
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
char[] charData = new char[100];
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
try
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![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
FileStream file = new FileStream(filePath, FileMode.Open);
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
//文件指针指向0位置
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
file.Seek(0, SeekOrigin.Begin);
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
//读入两百个字节
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
file.Read(data, 0, 200);
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
//提取字节数组
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
Decoder dec = Encoding.UTF8.GetDecoder();
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
dec.GetChars(data, 0, data.Length, charData, 0);
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![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
catch (Exception ex)
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![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
throw ex;
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![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
return Convert.ToString(charData);
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![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
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![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
/**//// <summary>
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
/// StreamWriter写文件
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![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
/// </summary>
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
public void StreamWriterWriteFile()
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![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
try
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![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
FileStream nFile = new FileStream("love.txt", FileMode.CreateNew);
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
StreamWriter writer = new StreamWriter(nFile);
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
writer.WriteLine("I love You!");
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
writer.WriteLine("Do you love me!");
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
writer.Close();
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![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
catch
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![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{ }
86
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
87
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
/**//// <summary>
88
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
/// StreamReader读取文件
89
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
/// </summary>
90
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
/// <returns></returns>
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
public string StreamReaderReadFile()
92
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
93
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
string str="";
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
try
95
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
96
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
FileStream file = new FileStream("love.txt", FileMode.Open);
97
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
StreamReader sr = new StreamReader(file);
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
while (sr.ReadLine()!=null)
99
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
100
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
str += sr.ReadLine();
101
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
102
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
//或者str = sr.ReadToEnd();
103
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
sr.Close();
104
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
105
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
catch
106
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{ }
107
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
return str;
108
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
109
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif)
}
110
其中创建FileStream对象最简单的构造函数如下:
1
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
FileStream file = new FileStream(fileName,FileMode.Member);
2
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
FileStream file = new FileStream(fileName, FileMode.Member, FileAccess.Member);
[align=left]而FileAccess的成员:[/align]
成 员 | 说 明 |
Read | 打开文件,用于只读 |
Write | 打开文件,用于只写 |
ReadWrite | 打开文件,用于读写 |
对文件进行不是FileAccess枚举成员指定的操作会导致抛出异常。此属性的作用是,基于用户的身份验证级别改变用户对文件的访问权限。
在FileStream构造函数不使用FileAccess枚举参数的版本中,使用默认值FileAccess. ReadWrite。
FileMode枚举成员,使用每个值会发生什么,取决于指定的文件名是否表示已有的文件。
成 员 | 文 件 存 在 | 文件不存在 |
Append | 打开文件,流指向文件的末尾,只能与枚举FileAccess.Write联合使用 | 创建一个新文件。只能与枚举FileAccess.Write联合使用 |
Create | 删除该文件,然后创建新文件 | 创建新文件 |
CreateNew | 抛出异常 | 创建新文件 |
Open | 打开现有的文件,流指向文件的开头 | 抛出异常 |
OpenOrCreate | 打开文件,流指向文件的开头 | 创建新文件 |
Truncate | 打开现有文件,清除其内容。流指向文件的开头,保留文件的初始创建日期 | 抛出异常 |
[/align]FileStream类操作的是字节和字节数组,而Stream类操作的是字符数据
StreamWriter允许将字符和字符串写入文件,它处理底层的转换,向FileStream对象写入数据。StreamReader也类似。
实例:
1
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
using System;
2
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
using System.Data;
3
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
using System.IO;
4
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
using System.Text;
5
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
6
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gif)
/**//// <summary>
7
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
/// Summary description for FileReadAndWrite
8
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif)
/// </summary>
9
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
public class FileReadAndWrite
10
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
11
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
public FileReadAndWrite()
12
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
13
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
//
14
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
// TODO: Add constructor logic here
15
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
//
16
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
17
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
/**//// <summary>
18
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
/// 用FileStream写文件
19
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
/// </summary>
20
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
/// <param name="str"></param>
21
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
/// <returns></returns>
22
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
public void FileStreamWriteFile(string str)
23
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
24
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
byte[] byData;
25
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
char[] charData;
26
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
try
27
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
28
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
FileStream nFile = new FileStream("love.txt", FileMode.Create);
29
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
//获得字符数组
30
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
charData = str.ToCharArray();
31
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
//初始化字节数组
32
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
byData = new byte[charData.Length];
33
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
//将字符数组转换为正确的字节格式
34
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
Encoder enc = Encoding.UTF8.GetEncoder();
35
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
enc.GetBytes(charData, 0, charData.Length,byData,0,true);
36
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
nFile.Seek(0, SeekOrigin.Begin);
37
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
nFile.Write(byData, 0, byData.Length);
38
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
39
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
catch (Exception ex)
40
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
41
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
throw ex;
42
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
43
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
44
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
/**//// <summary>
45
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
/// FileStream读取文件
46
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
/// </summary>
47
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
/// <param name="filePath"></param>
48
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
/// <returns></returns>
49
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
public string FileStreamReadFile(string filePath)
50
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
51
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
byte[] data = new byte[100];
52
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
char[] charData = new char[100];
53
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
try
54
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
FileStream file = new FileStream(filePath, FileMode.Open);
56
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
//文件指针指向0位置
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
file.Seek(0, SeekOrigin.Begin);
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
//读入两百个字节
59
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
file.Read(data, 0, 200);
60
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
//提取字节数组
61
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
Decoder dec = Encoding.UTF8.GetDecoder();
62
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
dec.GetChars(data, 0, data.Length, charData, 0);
63
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
64
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
catch (Exception ex)
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![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
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![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
throw ex;
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![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
68
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
return Convert.ToString(charData);
69
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
70
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
/**//// <summary>
71
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
/// StreamWriter写文件
72
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
/// </summary>
73
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
public void StreamWriterWriteFile()
74
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
75
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
try
76
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
77
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
FileStream nFile = new FileStream("love.txt", FileMode.CreateNew);
78
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
StreamWriter writer = new StreamWriter(nFile);
79
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
80
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
writer.WriteLine("I love You!");
81
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
writer.WriteLine("Do you love me!");
82
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
writer.Close();
83
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
84
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
catch
85
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{ }
86
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
87
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
/**//// <summary>
88
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
/// StreamReader读取文件
89
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
/// </summary>
90
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
/// <returns></returns>
91
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
public string StreamReaderReadFile()
92
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
93
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
string str="";
94
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
try
95
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
96
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
FileStream file = new FileStream("love.txt", FileMode.Open);
97
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
StreamReader sr = new StreamReader(file);
98
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
while (sr.ReadLine()!=null)
99
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{
100
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
str += sr.ReadLine();
101
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
102
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
//或者str = sr.ReadToEnd();
103
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
sr.Close();
104
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
105
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
catch
106
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](http://www.cnblogs.com/Images/OutliningIndicators/ContractedSubBlock.gif)
![](http://www.cnblogs.com/Images/dot.gif)
{ }
107
![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
return str;
108
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
}
109
![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif)
}
110
![](http://www.cnblogs.com/Images/OutliningIndicators/None.gif)
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