using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Collections;
using System.IO;
using System.Text;
using System.Windows.Forms;
namespace test2
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private string curFileName;
private System.Drawing.Bitmap curBitmap;
private void Form1_Load(object sender, EventArgs e)
{ }
private void open_Click_1(object sender, EventArgs e)
{ }
private void button1_Click(object sender, EventArgs e)
{
OpenFileDialog opnDlg = new OpenFileDialog();
opnDlg.Filter = "*.jpg|*.jpg";
opnDlg.Title = "打开图像文件";
opnDlg.ShowHelp = true;
if (opnDlg.ShowDialog() == DialogResult.OK)
{
curFileName = opnDlg.FileName;
try
{
curBitmap = (Bitmap)Image.FromFile(opnDlg.FileName);
}
catch (Exception exp)
{
MessageBox.Show(exp.Message);
}
}
Invalidate();
}
private void Form1_Load_1(object sender, EventArgs e)
{ }
private void button2_Click(object sender, EventArgs e)
{
if (curBitmap == null)
return;
SaveFileDialog saveDlg = new SaveFileDialog();
saveDlg.Title = "保存为";
saveDlg.OverwritePrompt = true;
saveDlg.Filter = "*.jpg|*.jpg";
saveDlg.ShowHelp = true;
if (saveDlg.ShowDialog() == DialogResult.OK)
{
string fileName = saveDlg.FileName;
string strFilExten = fileName.Remove(0, fileName.Length - 3);
switch (strFilExten)
{
case "bmp":
curBitmap.Save(fileName, System.Drawing.Imaging.ImageFormat.Bmp);
break;
case "jpg":
curBitmap.Save(fileName, System.Drawing.Imaging.ImageFormat.Jpeg);
break;
case "gif":
curBitmap.Save(fileName, System.Drawing.Imaging.ImageFormat.Gif);
break;
case "tif":
curBitmap.Save(fileName, System.Drawing.Imaging.ImageFormat.Tiff);
break;
case "png":
curBitmap.Save(fileName, System.Drawing.Imaging.ImageFormat.Png);
break;
default:
break;
}
}
} private void button3_Click(object sender, EventArgs e)
{
this.Close();
} private void Form1_Paint_1(object sender, PaintEventArgs e)
{
Graphics g = e.Graphics;
if (curBitmap != null)
{
g.DrawImage(curBitmap, 160, 20,180, 180);
}
} private void button4_Click(object sender, EventArgs e)
{
byte[] arrFile = null; //先定义一个byte数组
//将指定的文件数据读取到 数组中
using (FileStream fs = new FileStream("", FileMode.Open)) //path是文件的路径
{
arrFile = new byte[fs.Length];//定义这个byte[]数组的长度 为文件的length
fs.Read(arrFile, 0, arrFile.Length);//把fs文件读入到arrFile数组中,0是指偏移量,从0开始读,arrFile.length是指需要读的长度,也就是整个文件的长度
textBox1.Text = arrFile[10].ToString ();//测试用...
string file = "E:\a.txt";
StreamWriter wr = new StreamWriter(new FileStream(file, FileMode.Append));
for (int k = 0; k < arrFile.Length; k++)
{
wr.WriteLine(Convert.ToString(arrFile[k]));
}
//StreamWriter sw = new StreamWriter("F:/2.txt", Encoding.Default);
//int k = arrFile.Length;
//int i;
//for (int i = 0; i < k; i++)
//{
// sw = Convert.ToString(arrFile[i]);
//}
} }
}
}
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Collections;
using System.IO;
using System.Text;
using System.Windows.Forms;
namespace test2
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private string curFileName;
private System.Drawing.Bitmap curBitmap;
private void Form1_Load(object sender, EventArgs e)
{ }
private void open_Click_1(object sender, EventArgs e)
{ }
private void button1_Click(object sender, EventArgs e)
{
OpenFileDialog opnDlg = new OpenFileDialog();
opnDlg.Filter = "*.jpg|*.jpg";
opnDlg.Title = "打开图像文件";
opnDlg.ShowHelp = true;
if (opnDlg.ShowDialog() == DialogResult.OK)
{
curFileName = opnDlg.FileName;
try
{
curBitmap = (Bitmap)Image.FromFile(opnDlg.FileName);
}
catch (Exception exp)
{
MessageBox.Show(exp.Message);
}
}
Invalidate();
}
private void Form1_Load_1(object sender, EventArgs e)
{ }
private void button2_Click(object sender, EventArgs e)
{
if (curBitmap == null)
return;
SaveFileDialog saveDlg = new SaveFileDialog();
saveDlg.Title = "保存为";
saveDlg.OverwritePrompt = true;
saveDlg.Filter = "*.jpg|*.jpg";
saveDlg.ShowHelp = true;
if (saveDlg.ShowDialog() == DialogResult.OK)
{
string fileName = saveDlg.FileName;
string strFilExten = fileName.Remove(0, fileName.Length - 3);
switch (strFilExten)
{
case "bmp":
curBitmap.Save(fileName, System.Drawing.Imaging.ImageFormat.Bmp);
break;
case "jpg":
curBitmap.Save(fileName, System.Drawing.Imaging.ImageFormat.Jpeg);
break;
case "gif":
curBitmap.Save(fileName, System.Drawing.Imaging.ImageFormat.Gif);
break;
case "tif":
curBitmap.Save(fileName, System.Drawing.Imaging.ImageFormat.Tiff);
break;
case "png":
curBitmap.Save(fileName, System.Drawing.Imaging.ImageFormat.Png);
break;
default:
break;
}
}
} private void button3_Click(object sender, EventArgs e)
{
this.Close();
} private void Form1_Paint_1(object sender, PaintEventArgs e)
{
Graphics g = e.Graphics;
if (curBitmap != null)
{
g.DrawImage(curBitmap, 160, 20,180, 180);
}
} private void button4_Click(object sender, EventArgs e)
{
byte[] arrFile = null; //先定义一个byte数组
//将指定的文件数据读取到 数组中
using (FileStream fs = new FileStream("", FileMode.Open)) //path是文件的路径
{
arrFile = new byte[fs.Length];//定义这个byte[]数组的长度 为文件的length
fs.Read(arrFile, 0, arrFile.Length);//把fs文件读入到arrFile数组中,0是指偏移量,从0开始读,arrFile.length是指需要读的长度,也就是整个文件的长度
textBox1.Text = arrFile[10].ToString ();//测试用...
string file = "E:\a.txt";
StreamWriter wr = new StreamWriter(new FileStream(file, FileMode.Append));
for (int k = 0; k < arrFile.Length; k++)
{
wr.WriteLine(Convert.ToString(arrFile[k]));
}
//StreamWriter sw = new StreamWriter("F:/2.txt", Encoding.Default);
//int k = arrFile.Length;
//int i;
//for (int i = 0; i < k; i++)
//{
// sw = Convert.ToString(arrFile[i]);
//}
} }
}
}
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{
byte[] arrFile = null; //先定义一个byte数组
//将指定的文件数据读取到 数组中
using (FileStream fs = new FileStream("", FileMode.Open)) //path是文件的路径
{
arrFile = new byte[fs.Length];//定义这个byte[]数组的长度 为文件的length
fs.Read(arrFile, 0, arrFile.Length);//把fs文件读入到arrFile数组中,0是指偏移量,从0开始读,arrFile.length是指需要读的长度,也就是整个文件的长度
textBox1.Text = arrFile[10].ToString ();//测试用...
string file = "E:\a.txt";
StreamWriter wr = new StreamWriter(new FileStream(file, FileMode.Append));
for (int k = 0; k < arrFile.Length; k++)
{
wr.WriteLine(Convert.ToString(arrFile[k]));
}
//StreamWriter sw = new StreamWriter("F:/2.txt", Encoding.Default);
//int k = arrFile.Length;
//int i;
//for (int i = 0; i < k; i++)
//{
// sw = Convert.ToString(arrFile[i]);
//}sw.close();//------------------------------------加上这一句试一下
} }
}
}
int state = 0;
bool beginFlag = true;
long beginPosition = -1, endPosition = -1;
for (int value = fileStream.ReadByte(); value > -1; value = fileStream.ReadByte())
{
}
if (state == 100)
{
byte[] bytes = new byte[endPosition - beginPosition + 1];
fileStream.Position = beginPosition;
fileStream.Read(bytes, 0, bytes.Length);
File.WriteAllBytes(@"c:\a.png", bytes);
}
fileStream.Close();
for (int k = 0; k < arrFile.Length; k++)
{
wr.WriteLine(Convert.ToString(arrFile[k]));
}
//这段效率很差,K每次增加1