1、FileStream
FileStream 详细介绍参考msdn
写数据:
using (FileStream fs = new FileStream("File.FileStream", FileMode.Create, FileAccess.Write))
{
for (int i = 0; i < Cycles; i++)
{
for (int j = 0; j < Length; j++)
{
dis[j] = i * Length + j;
}
Buffer.BlockCopy(dis, 0, byData, i * readCount, readCount);
}
fs.Write(byData, 0, byData.Length);
}
读数据
using (FileStream fs = new FileStream("File.FileStream", FileMode.Open, FileAccess.Read))
{
for (int i = 0; i < Cycles; i++)
{
fs.Seek(i * readCount, SeekOrigin.Begin);
fs.Read(byData, 0, readCount);
dis = new double[Length];
Buffer.BlockCopy(byData, i * readCount, dis, 0, readCount);
}
}
2、BinaryWriter/BinaryReader
2.1 BinaryWriter(将二进制中的基元类型写入流并支持用特定的编码写入字符串。) 详细介绍参考msdn
using (BinaryWriter bw = new BinaryWriter(File.Open("File.Binary", FileMode.Create)))
{
byte[] data = new byte[Cycles * readCount];
for (int i = 0; i < Cycles; i++)
{
for (int j = 0; j < Length; j++)
{
dis[j] = i * Length + j;
}
Buffer.BlockCopy(dis, 0, data, i * readCount, readCount);
}
bw.Write(data);
}
2.2 BinaryReader (用特定的编码将基元数据类型读作二进制值。)详细介绍参考msdn
using (BinaryReader wr = new BinaryReader(File.Open("File.Binary", FileMode.Open)))
{
for (int i = 0; i < Cycles; i++)
{
var readData = wr.ReadBytes(readCount);
dis = new double[Length];
Buffer.BlockCopy(readData, 0, dis, 0, readCount);
}
}
3、StreamWriter/StreamReader
3.1 StreamWriter 详细介绍参考msdn
using (StreamWriter sw = new StreamWriter("File.Stream", false, Encoding.GetEncoding("utf-16")))
{
StringBuilder sb = new StringBuilder();
for (int i = 0; i < Cycles; i++)
{
for (int j = 0; j < Length; j++)
{
dis[j] = i * Length + j;
sb.AppendFormat("{0},", dis[j]);
}
sb.AppendFormat("\n");
}
sw.WriteLine(sb);
}
3.2 StreamReader 详细介绍参考msdn
using (StreamReader sd = new StreamReader("File.Stream", Encoding.GetEncoding("utf-16")))
{
for (int i = 0; i < Cycles; i++)
{
string[] ch = sd.ReadLine().Split(new Char[] { ',' },
System.StringSplitOptions.RemoveEmptyEntries);
for (int j = 0; j < Length; j++)
{
double.TryParse(ch[j], out dis[j]);
}
}
}
4 完整测试代码:
class Program
{
static void Main()
{
fileReadAndWrite.BinaryWriterMethod();
fileReadAndWrite.BinaryReaderMethod();
fileReadAndWrite.FileStreamWriterMethod();
fileReadAndWrite.FileStreamReadMethod();
fileReadAndWrite.StreamWriterMethod();
fileReadAndWrite.StreamReaderMethod();
Console.ReadKey(true);
}
}
class FileReadAndWrite
{
private const int Length = 1024;
private const int Cycles = 64;
private int readCount;
private byte[] byData;
private double[] dis;
public FileReadAndWrite()
{
readCount = Length * sizeof(double);
dis = new double[Length];
byData = new byte[Cycles * Length * sizeof(double)];
}
#region BinaryWriter\BinaryReader
public void BinaryWriterMethod()
{
using (BinaryWriter bw = new BinaryWriter(File.Open("File.Binary", FileMode.Create)))
{
byte[] data = new byte[Cycles * readCount];
for (int i = 0; i < Cycles; i++)
{
for (int j = 0; j < Length; j++)
{
dis[j] = i * Length + j;
}
Buffer.BlockCopy(dis, 0, data, i * readCount, readCount);
}
bw.Write(data);
}
}
public void BinaryReaderMethod()
{
using (BinaryReader wr = new BinaryReader(File.Open("File.Binary", FileMode.Open)))
{
for (int i = 0; i < Cycles; i++)
{
var readData = wr.ReadBytes(readCount);
Buffer.BlockCopy(readData, 0, dis, 0, readCount);
}
}
}
#endregion
#region FileStream Read\Write
public void FileStreamWriterMethod()
{
using (FileStream fs = new FileStream("File.FileStream", FileMode.Create,FileAccess.Write))
{
for (int i = 0; i < Cycles; i++)
{
for (int j = 0; j < Length; j++)
{
dis[j] = i * Length + j;
}
Buffer.BlockCopy(dis, 0, byData, i * readCount, readCount);
}
fs.Write(byData, 0, byData.Length);
}
}
public void FileStreamReadMethod()
{
using (FileStream fs = new FileStream("File.FileStream", FileMode.Open, FileAccess.Read))
{
for (int i = 0; i < Cycles; i++)
{
fs.Seek(i * readCount, SeekOrigin.Begin);
fs.Read(byData, 0, readCount);
Buffer.BlockCopy(byData, i * readCount, dis, 0, readCount);
}
}
}
#endregion
#region StreamWriter\StreamReader
public void StreamWriterMethod()
{
using (StreamWriter sw = new StreamWriter("File.Stream", false,
Encoding.GetEncoding("utf-16")))
{
StringBuilder sb = new StringBuilder();
for (int i = 0; i < Cycles; i++)
{
for (int j = 0; j < Length; j++)
{
dis[j] = i * Length + j;
sb.AppendFormat("{0},", dis[j]);
}
sb.AppendFormat("\n");
}
sw.WriteLine(sb);
}
}
public void StreamReaderMethod()
{
using (StreamReader sd = new StreamReader("File.Stream", Encoding.GetEncoding("utf-16")))
{
for (int i = 0; i < Cycles; i++)
{
string[] ch = sd.ReadLine().Split(new Char[] { ',' },
System.StringSplitOptions.RemoveEmptyEntries);
for (int j = 0; j < Length; j++)
{
double.TryParse(ch[j], out dis[j]);
}
}
}
}
#endregion
}