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Form1.cs
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Form1.cs
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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;
using System.Text.RegularExpressions;
namespace computer1
{
public partial class Form1 : Form
{
/*磁盘初始化变量*/
private byte[] fat = new byte[128];
private byte[] root = new byte[64];
private List<string> Names = new List<string>();
public Form1()
{
//format();
InitializeComponent();
//刷新磁盘
init_();
}
/*格式化*/
private void format()
{
string path = "C:/Users/HP/Desktop/expriment/c++_vs/computer1/resource/disk.txt";
FileStream f = new FileStream(path, FileMode.Truncate, FileAccess.ReadWrite);
f.WriteByte((byte)(1));
f.WriteByte((byte)(1));
f.WriteByte((byte)(2));
f.WriteByte((byte)(3));
fat[0] = 1;
fat[1] = 1;
fat[2] = 2;//根目录
fat[3] = 3;//c目录占据
for (int i = 4; i <128; i++)
{
f.WriteByte((byte)(128));
fat[i] = 128;
}
byte[] bytes = Encoding.UTF8.GetBytes("C d");
f.Write(bytes,0,bytes.Length);
f.WriteByte((byte)(3));
f.Write(Encoding.UTF8.GetBytes(" "),0,1);
for (int i = 136; i < 64*128; i++)
{
f.Write(Encoding.UTF8.GetBytes(" "), 0, 1);
}
f.Close();
}
/*刷新磁盘（每改变一次磁盘就刷新一次)*/
private void init_()
{
for(int i=1;i<=128;i++)
{
Label lab = (this.Controls.Find("label" + Convert.ToString(i), true).First()) as Label;
lab.BackColor = Color.YellowGreen;
}
this.treeView1.Nodes.Clear();
string path = "C:/Users/HP/Desktop/expriment/c++_vs/computer1/resource/disk.txt";
FileStream f = new FileStream(path, FileMode.Open, FileAccess.Read);
f.Read(fat, 0, 128);
f.Read(root, 0, 64);
for (int i = 0; i < 128; i++)
{
if (fat[i] != (byte)(128))
{
Label lab = (this.Controls.Find("label" + Convert.ToString(i + 1), true).First()) as Label;
lab.BackColor = Color.DodgerBlue;
}
}
f.Close();
//初始化根目录
string filename = "";
int start = 0;
for (int i = 0; i < 64; i = i + 8)
{
if (root[i] != 32)
{
byte[] item = new byte[8];
for (int j = 0; j < 8; j++)
{
item[j] = root[i + j];
}
filename = Encoding.UTF8.GetString(item,0,3).Trim();
Names.Add(filename);
start = item[6];
TreeNode newnode = new TreeNode(filename, 2, 3);
newnode.Name = filename;
file_option.Traverse(start, newnode,menu2,menu3,menu3e,Names);
this.treeView1.Nodes.Add(newnode);
newnode.ContextMenuStrip = menu2;
newnode.Expand();
}
}
treeView1.TreeViewNodeSorter = new file_option();
}
/*menu1右键菜单*/
private void 添加根目录ToolStripMenuItem_Click(object sender, EventArgs e)
{
string path = "C:/Users/HP/Desktop/expriment/c++_vs/computer1/resource/disk.txt";
//判断根目录是否已满
int count = this.treeView1.GetNodeCount(false);
if(count>=8)
{
MessageBox.Show("根目录已满！");
return;
}
//视图中创建树
edit_file window = new edit_file();
window.Enable2 = false;
window.Enable3 = false;
window.ShowDialog();
string file_name=window.file_name;
if (file_name == "")
return;
else if(Names.Contains(file_name))
{
MessageBox.Show("该名称已存在！");
return;
}
Names.Add(file_name);
//磁盘中写入文件控制块
//寻找磁盘块
int i = 3;
for(;i<128;i++)
{
if (fat[i] == 128)
break;
else if (i == 127)
{
MessageBox.Show("磁盘空间已满！");
return;
}
}
//改变文件控制块，改变位示图
fat[i] = (byte)(i);
Label lab = (this.Controls.Find("label" + Convert.ToString(i + 1), true).First()) as Label;
lab.BackColor = Color.DodgerBlue;
//写入控制块
file_option.add_tree(path, file_name,2, i,count);//2是根目录目录项存放处，i是其实盘块号,count是目录项数量
//写入图标
TreeNode newnode = new TreeNode(file_name, 2, 3);
newnode.Name = file_name;
newnode.ContextMenuStrip = menu2;
this.treeView1.Nodes.Add(newnode);
}
private void 格式化磁盘ToolStripMenuItem_Click(object sender, EventArgs e)
{
format();
init_();
}
/*menu2右键菜单*/
private void 添加目录ToolStripMenuItem_Click(object sender, EventArgs e)
{
//判断子节点的数量是否超过限制
int count = this.treeView1.SelectedNode.GetNodeCount(false);
if(count==8)
{
MessageBox.Show("目录数量达到上限！");
return;
}
//视图中创建树
edit_file window = new edit_file();
window.Enable2 = false;
window.Enable3 = false;
window.ShowDialog();
string file_name = window.file_name;
if (file_name == "")
return;
else if (Names.Contains(file_name))
{
MessageBox.Show("该名称已存在！");
return;
}
Names.Add(file_name);
//查找父节点的起始盘块号
string path = "C:/Users/HP/Desktop/expriment/c++_vs/computer1/resource/disk.txt";
string name_parent = this.treeView1.SelectedNode.Text;
string name = "";
FileStream f = new FileStream(path, FileMode.Open, FileAccess.Read);
f.Seek(128, SeekOrigin.Begin);
int j = 128;
int store;
while(true)
{
byte[] bytes = new byte[3];
byte[] bytes1 = new byte[1];
int i;
for(i=0;i<3;i++)
{
f.Read(bytes1, 0, 1);
if (bytes1[0]==Encoding.UTF8.GetBytes(" ").First())
{
break;
}
bytes[i] = bytes1[0];
}
name = Encoding.UTF8.GetString(bytes,0,i);
if (name==name_parent)
{
f.Seek(j + 6, SeekOrigin.Begin);
store=f.ReadByte();
break;
}
else
{
j = j + 8;
f.Seek(j, SeekOrigin.Begin);
}
}
f.Close();
//查找空闲块
int start = 3;
for (; start < 128; start++)
{
if (fat[start] == 128)
break;
else if (start == 127)
{
MessageBox.Show("磁盘空间已满！");
return;
}
}
//刷新位示图
fat[start] = (byte)(start);
Label lab = (this.Controls.Find("label" + Convert.ToString(start + 1), true).First()) as Label;
lab.BackColor = Color.DodgerBlue;
//向父目录节点内写入文件控制块信息
file_option.add_tree(path, file_name, store, start, count);
//写入图标
TreeNode newnode = new TreeNode(file_name, 2, 3);
newnode.Name = file_name;
newnode.ContextMenuStrip = menu2;
this.treeView1.SelectedNode.Nodes.Add(newnode);
this.treeView1.SelectedNode.Expand();
treeView1.TreeViewNodeSorter = new file_option();
}
private void 添加文件ToolStripMenuItem_Click(object sender, EventArgs e)
{
/*判断子节点的数量是否超过限制*/
int count = this.treeView1.SelectedNode.GetNodeCount(false);
if (count == 8)
{
MessageBox.Show("文件数量达到上限！");
return;
}
/*视图中创建树*/
edit_file window = new edit_file();
window.Enable3 = true;
window.ShowDialog();
if (window.DialogResult == DialogResult.Cancel)
return;
string file_name = window.file_name;
string file_type = window.file_type;
string context = window.context;
if (context.Length>256)
{
MessageBox.Show("字数超出限制!");
return;
}
if (Names.Contains(file_name))
{
MessageBox.Show("该名称已存在！");
return;
}
Names.Add(file_name);
/*查找父节点的起始盘块号*/
string path = "C:/Users/HP/Desktop/expriment/c++_vs/computer1/resource/disk.txt";
string name_parent = this.treeView1.SelectedNode.Text;
string name = "";
FileStream f = new FileStream(path, FileMode.Open, FileAccess.Read);
f.Seek(128, SeekOrigin.Begin);
int j = 128;
int store;//起始盘块号
while (true)
{
byte[] bytes = new byte[3];
byte[] bytes1 = new byte[1];
int i;
for (i = 0; i < 3; i++)
{
f.Read(bytes1, 0, 1);
if (bytes1[0] == Encoding.UTF8.GetBytes(" ").First())
{
break;
}
bytes[i] = bytes1[0];
}
name = Encoding.UTF8.GetString(bytes, 0, i);
if (name == name_parent)
{
f.Seek(j + 6, SeekOrigin.Begin);
store = f.ReadByte();
break;
}
else
{
j = j + 8;
f.Seek(j, SeekOrigin.Begin);
}
}
f.Close();
/*查找空闲块并刷新位示图*/
int start = 4;
int count_;
int pre=0;
int start_num = 0 ;
if (context.Length % 64 == 0)
count_ = context.Length / 64;
else
count_ = context.Length / 64+1;
for (; start < 128; start++)
{
if (fat[start] == 128)
{
pre = start;
start_num = start;
fat[pre] = (byte)(start);
Label lab = (Controls.Find("label" + Convert.ToString(start + 1), true).First()) as Label;
lab.BackColor = Color.DodgerBlue;
count_--;
start++;
break;
}
else if(start==127)
{
MessageBox.Show("磁盘空间已满！");
return;
}
}
while (count_ > 0)
{
for (; start < 128; start++)
{
if(fat[start] == 128)
{
if (count_ <= 0)
break;
fat[pre] = (byte)(start);
fat[start] = (byte)(start);
pre = start;
count_--;
//刷新位示图
Label lab= (this.Controls.Find("label" + Convert.ToString(start + 1), true).First()) as Label;
lab.BackColor = Color.DodgerBlue;
}
else if (start == 127)
{
MessageBox.Show("磁盘空间已满！");
return;
}
}
}
//向父目录节点内写入文件控制块信息
file_option.add_file(path, file_name,file_type,store, start_num,fat,context,count);
//写入图标
TreeNode newnode = new TreeNode(file_name, 0, 1);
if(file_type=="ex")
newnode.ContextMenuStrip = menu3e;
else
newnode.ContextMenuStrip = menu3;
newnode.Name = file_name;
this.treeView1.SelectedNode.Nodes.Add(newnode);
this.treeView1.SelectedNode.Expand();
treeView1.TreeViewNodeSorter = new file_option();
}
private void 删除目录ToolStripMenuItem_Click(object sender, EventArgs e)
{
/*查找该节点的起始盘块号*/
string path = "C:/Users/HP/Desktop/expriment/c++_vs/computer1/resource/disk.txt";
string filename = this.treeView1.SelectedNode.Text;//文件名
string filetype;//文件类型
string name = "";
FileStream f = new FileStream(path, FileMode.Open, FileAccess.Read);
f.Seek(128, SeekOrigin.Begin);
int j = 128;
int store;//起始盘块号
while (true)
{
byte[] bytes = new byte[3];
byte[] bytes1 = new byte[1];
byte[] bytes2 = new byte[2];
int i;
for (i = 0; i < 3; i++)
{
f.Read(bytes1, 0, 1);
if (bytes1[0] == Encoding.UTF8.GetBytes(" ").First())
{
break;
}
bytes[i] = bytes1[0];
}
name = Encoding.UTF8.GetString(bytes, 0, i);
if (name == filename)
{
f.Seek(j + 3, SeekOrigin.Begin);
f.Read(bytes2, 0, 2);
filetype = Encoding.UTF8.GetString(bytes2).Trim();
f.Seek(j + 6, SeekOrigin.Begin);
store = f.ReadByte();
break;
}
else
{
j = j + 8;
f.Seek(j, SeekOrigin.Begin);
}
}
f.Close();
/*递归删除目录项*/
byte[] disk = new byte[128 * 64];//读磁盘
f = new FileStream(path, FileMode.Open, FileAccess.Read);
f.Read(disk, 0, 128 * 64);
f.Close();
Stack<string> fname = new Stack<string>();//存文件名称
Stack<string> ftype = new Stack<string>();//存文件类型
Stack<int> fstore = new Stack<int>();//存文件起始盘块号
byte[] file_context = new byte[64];
fname.Push(filename);
ftype.Push("d");
fstore.Push(store);
while(fstore.Count!=0)
{
filename = fname.Pop();
Names.Remove(filename);
store = fstore.Pop();
filetype = ftype.Pop();
for(int i=store*64;i<(store+1)*64;i++)
{
file_context[i - store * 64] = disk[i];
}
if(filetype=="d")//如果是目录的话
{
disk[store] = 128;//更改文件分配表
for (int i = store * 64; i < (store + 1) * 64; i++)//删除内容
{
disk[i] = 32;
}
for (int jj=0;jj<64;jj=jj+8)
{
if (file_context[jj] != 32)
{
filename= Encoding.UTF8.GetString(file_context, jj, 3).Trim();
filetype = Encoding.UTF8.GetString(file_context, jj + 5, 1);
store = file_context[jj + 6];
fname.Push(filename);
ftype.Push(filetype);
fstore.Push(store);
}
else
break;
}
}
else if(filetype=="l")//如果是文件的话
{
while(disk[store]!=store)
{
//清理空间
for (int i = store * 64; i < (store + 1) * 64; i++)
{
disk[i] = 32;
}
//更改文件分配表
int t = disk[store];
disk[store] = 128;
store = t;
}
if(disk[store]==store)
{
//清理空间
for (int i = store * 64; i < (store + 1) * 64; i++)
{
disk[i] = 32;
}
//更改文件分配表
disk[store] = 128;
}
}
}
for (int i = j; i < ((j / 64 + 1) * 64 - 8); i++)
{
disk[i] = disk[i + 8];
}
for (int i = ((j / 64 + 1) * 64 - 8); i < (j / 64 + 1) * 64; i++)
{
disk[i] = 32;
}
f = new FileStream(path, FileMode.Truncate, FileAccess.Write);
f.Write(disk, 0, 128 * 64);
f.Close();
treeView1.SelectedNode.Nodes.Clear();
treeView1.Nodes.Remove(treeView1.SelectedNode);
init_();
}
/*menu3右键菜单*/
private void 编辑文件ToolStripMenuItem_Click(object sender, EventArgs e)
{
/*查找该节点的起始盘块号*/
string path = "C:/Users/HP/Desktop/expriment/c++_vs/computer1/resource/disk.txt";
string filename = this.treeView1.SelectedNode.Text;//文件名
string filetype;//文件类型
int count = this.treeView1.SelectedNode.Parent.GetNodeCount(false);
string name = "";
FileStream f = new FileStream(path, FileMode.Open, FileAccess.Read);
f.Seek(128, SeekOrigin.Begin);
int j = 128;
int store;//起始盘块号
while (true)
{
byte[] bytes = new byte[3];
byte[] bytes1 = new byte[1];
byte[] bytes2 = new byte[2];
int i;
for (i = 0; i < 3; i++)
{
f.Read(bytes1, 0, 1);
if (bytes1[0] == Encoding.UTF8.GetBytes(" ").First())
{
break;
}
bytes[i] = bytes1[0];
}
name = Encoding.UTF8.GetString(bytes, 0, i);
if (name == filename)
{
f.Seek(j+3, SeekOrigin.Begin);
f.Read(bytes2, 0, 2);
filetype = Encoding.UTF8.GetString(bytes2).Trim();
f.Seek(j + 6, SeekOrigin.Begin);
store = f.ReadByte();
break;
}
else
{
j = j + 8;
f.Seek(j, SeekOrigin.Begin);
}
}
f.Close();
/*提取内容*/
string context="";
int ii = store;
while(fat[ii]!=ii)
{
int next = fat[store];
f = new FileStream(path, FileMode.Open, FileAccess.Read);
f.Seek(store * 64, SeekOrigin.Begin);
byte[] t = new byte[64];
f.Read(t, 0, 64);
f.Close();
context = context+Encoding.UTF8.GetString(t);
ii = fat[ii];
}
f = new FileStream(path, FileMode.Open, FileAccess.Read);
f.Seek(ii*64, SeekOrigin.Begin);
byte[] bytes3 = new byte[64];
f.Read(bytes3, 0, 64);
f.Close();
context = context+Encoding.UTF8.GetString(bytes3,0,64).Trim();
/*修改文件内容*/
edit_file window = new edit_file();
string k = filename;//用于Names
window.context = context;
window.file_name = filename;
window.file_type = filetype;
window.ShowDialog();
if (window.DialogResult == DialogResult.Cancel)
return;
filename = window.file_name;
filetype = window.file_type;
context = window.context;
if (context.Length > 256)
{
MessageBox.Show("字数超出限制!");
return;
}
if (!Names.Contains(filename))
{
Names.Remove(k);
Names.Add(filename);
this.treeView1.SelectedNode.Text = filename;//修改节点名字
this.treeView1.SelectedNode.Name = filename;
}
if (filetype == "ex")
this.treeView1.SelectedNode.ContextMenuStrip = menu3e;
//更改位示图
ii = store;
while(fat[ii]!=ii)
{
Label lab1 = (this.Controls.Find("label" + Convert.ToString(ii + 1), true).First()) as Label;
lab1.BackColor = Color.YellowGreen;
int t = fat[ii];
fat[ii] = 128;
ii = t;
}
if (fat[ii] == ii)
{
Label lab1 = (this.Controls.Find("label" + Convert.ToString(ii + 1), true).First()) as Label;
lab1.BackColor = Color.YellowGreen;
fat[ii] = 128;
}
//根据新的内容重新查找空闲块
int start = 4;
int count_;
int pre = 0;
int start_num = 0;
if (context.Length % 64 == 0)
count_ = context.Length / 64;
else
count_ = context.Length / 64 + 1;
for (; start < 128; start++)
{
if (fat[start] == 128)
{
pre = start;
start_num = start;
fat[pre] = (byte)(start);
Label lab1 = (this.Controls.Find("label" + Convert.ToString(start + 1), true).First()) as Label;
lab1.BackColor = Color.DodgerBlue;
count_--;
start++;
break;
}
else if (start == 127)
{
MessageBox.Show("磁盘空间已满！");
return;
}
}
while (count_ > 0)
{
for (; start < 128; start++)
{
if (fat[start] == 128)
{
if (count_ <= 0)
break;
fat[pre] = (byte)(start);
fat[start] = (byte)(start);
pre = start;
count_--;
//刷新位示图
Label lab1 = (this.Controls.Find("label" + Convert.ToString(start + 1), true).First()) as Label;
lab1.BackColor = Color.DodgerBlue;
}
else if (start == 127)
{
MessageBox.Show("磁盘空间已满！");
return;
}
}
}
//重新写入内容
file_option.add_file(path, filename, filetype, j/64, start_num, fat, context, count - 1);
}
private void 删除文件ToolStripMenuItem_Click(object sender, EventArgs e)
{
/*查找该节点的起始盘块号*/
string path = "C:/Users/HP/Desktop/expriment/c++_vs/computer1/resource/disk.txt";
string filename=this.treeView1.SelectedNode.Text;//文件名
string name = "";
FileStream f = new FileStream(path, FileMode.Open, FileAccess.Read);
f.Seek(128, SeekOrigin.Begin);
int j = 128;
int store;//起始盘块号
while (true)
{
byte[] bytes = new byte[3];
byte[] bytes1 = new byte[1];
byte[] bytes2 = new byte[2];
f.Read(bytes, 0, 3);
name = Encoding.UTF8.GetString(bytes, 0, 3).Trim();
if (name == filename)
{
f.Seek(j + 3, SeekOrigin.Begin);
f.Read(bytes2, 0, 2);
f.Seek(j + 6, SeekOrigin.Begin);
store = f.ReadByte();
break;
}
else
{
j = j + 8;
f.Seek(j, SeekOrigin.Begin);
}
}
f.Close();
//修改文件分配表 修改位示图
int ii = store;
Stack<int> p=new Stack<int>();
while(fat[ii]!=ii)
{
p.Push(ii);
Label lab1 = (this.Controls.Find("label" + Convert.ToString(ii + 1), true).First()) as Label;
lab1.BackColor = Color.YellowGreen;
int t = fat[ii];
fat[ii] = 128;
ii = t;
}
if (fat[ii] == ii)
{
p.Push(ii);
Label lab1 = (this.Controls.Find("label" + Convert.ToString(ii + 1), true).First()) as Label;
lab1.BackColor = Color.YellowGreen;
fat[ii] = 128;
}
//写入磁盘
f = new FileStream(path, FileMode.Open);
byte[] disk = new byte[128 * 64];
f.Read(disk, 0, 128 * 64);
f.Close();
//文件分配表
for (int i = 0; i < 128; i++)
{
disk[i] = fat[i];
}
//文件内容
while(p.Count!=0)
{
int m = p.Pop();
for(int i=0;i<64;i++)
{
disk[m * 64 + i] = 32;
}
}
//文件控制块
for (int i = j; i < ((j/64+1)*64-8); i++)
{
disk[i] = disk[i + 8];
}
for(int i= ((j / 64 + 1) * 64-8); i< (j / 64 + 1) * 64;i++)
{
disk[i] = 32;
}
f = new FileStream(path, FileMode.Truncate, FileAccess.Write);
f.Write(disk, 0, disk.Length);
f.Close();
//修改视图
treeView1.Nodes.Remove(treeView1.SelectedNode);
Names.Remove(filename);
}
/*menu3e右键菜单*/
private void 运行文件ToolStripMenuItem_Click(object sender, EventArgs e)
{
/*查找该节点的起始盘块号*/
string path = "C:/Users/HP/Desktop/expriment/c++_vs/computer1/resource/disk.txt";
string filename = this.treeView1.SelectedNode.Text;//文件名
string filetype;//文件类型
int count = this.treeView1.SelectedNode.Parent.GetNodeCount(false);
string name = "";
FileStream f = new FileStream(path, FileMode.Open, FileAccess.Read);
f.Seek(128, SeekOrigin.Begin);
int j = 128;
int store;//起始盘块号
while (true)
{
byte[] bytes = new byte[3];
byte[] bytes1 = new byte[1];
byte[] bytes2 = new byte[2];
int i;
for (i = 0; i < 3; i++)
{
f.Read(bytes1, 0, 1);
if (bytes1[0] == Encoding.UTF8.GetBytes(" ").First())
{
break;
}
bytes[i] = bytes1[0];
}
name = Encoding.UTF8.GetString(bytes, 0, i);
if (name == filename)
{
f.Seek(j + 3, SeekOrigin.Begin);
f.Read(bytes2, 0, 2);
filetype = Encoding.UTF8.GetString(bytes2).Trim();
f.Seek(j + 6, SeekOrigin.Begin);
store = f.ReadByte();
break;
}
else
{
j = j + 8;
f.Seek(j, SeekOrigin.Begin);
}
}
f.Close();
/*提取内容*/
string context = "";
int ii = store;
while (fat[ii] != ii)
{
int next = fat[store];
f = new FileStream(path, FileMode.Open, FileAccess.Read);
f.Seek(store * 64, SeekOrigin.Begin);
byte[] t = new byte[64];
f.Read(t, 0, 64);
f.Close();
context = context + Encoding.UTF8.GetString(t);
ii = fat[ii];
}
f = new FileStream(path, FileMode.Open, FileAccess.Read);
f.Seek(ii * 64, SeekOrigin.Begin);
byte[] bytes3 = new byte[64];
f.Read(bytes3, 0, 64);
f.Close();
context = context + Encoding.UTF8.GetString(bytes3, 0, 64).Trim();
//创建进程控制块插入就绪队列
process.cache = Regex.Split(context, "\r\n");
process.create();
PCB[] r1 = process.Ready.ToArray();
textBox_ready.Text = "";
foreach (PCB i in r1)
{
textBox_ready.Text = textBox_ready.Text + i.id + "\r\n";
}
}
private void 编辑文件ToolStripMenuItem1_Click(object sender, EventArgs e)
{
编辑文件ToolStripMenuItem_Click(sender, e);
}
private void 删除文件ToolStripMenuItem1_Click(object sender, EventArgs e)
{
删除文件ToolStripMenuItem_Click(sender, e);
}
/*命令接口*/
private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
if(e.KeyChar==(char)Keys.Enter)
{
string context1 = textBox1.Text;
string[] order = context1.Split(' ');
switch(order[0])
{
case "create": {
//是否重名
if (Names.Contains(order[1]))
{
MessageBox.Show("该名称已存在！");
return;
}
Names.Add(order[1]);
//计算子节点数量
TreeNode tn = treeView1.Nodes.Find(order[3], true).First();
int count = tn.GetNodeCount(false);
if (count == 8)
{
MessageBox.Show("文件数量达到上限！");
return;
}
/*查找父节点的起始盘块号*/
string path = "C:/Users/HP/Desktop/expriment/c++_vs/computer1/resource/disk.txt";
string name = "";
FileStream f = new FileStream(path, FileMode.Open, FileAccess.Read);
f.Seek(128, SeekOrigin.Begin);
int j = 128;
int store;//起始盘块号
while (true)
{
byte[] bytes = new byte[3];
byte[] bytes1 = new byte[1];
int i;
for (i = 0; i < 3; i++)
{
f.Read(bytes1, 0, 1);
if (bytes1[0] == Encoding.UTF8.GetBytes(" ").First())
{
break;
}
bytes[i] = bytes1[0];
}
name = Encoding.UTF8.GetString(bytes, 0, i);
if (name == order[3])
{
f.Seek(j + 6, SeekOrigin.Begin);
store = f.ReadByte();
break;
}
else
{
j = j + 8;
f.Seek(j, SeekOrigin.Begin);
}
}
f.Close();
/*查找空闲块并刷新位示图*/
int start = 4;
int start_num = 0;
for (; start < 128; start++)
{
if (fat[start] == 128)
{
start_num = start;
fat[start_num] = (byte)(start);
Label lab = (this.Controls.Find("label" + Convert.ToString(start + 1), true).First()) as Label;
lab.BackColor = System.Drawing.Color.DodgerBlue;
break;
}
else if (start == 127)
{
MessageBox.Show("磁盘空间已满！");
return;
}
}
//向父目录节点内写入文件控制块信息
file_option.add_file(path, order[1], order[2], store, start_num, fat, "", count);
//写入图标
TreeNode newnode = new TreeNode(order[1], 0, 1);
newnode.Name = order[1];
newnode.ContextMenuStrip = menu3;
tn.Nodes.Add(newnode);
tn.Expand();
treeView1.TreeViewNodeSorter = new file_option();
};break;//文件名 文件类型 父节点名称
case "mkdir": {
//是否重名
if (Names.Contains(order[1]))
{
MessageBox.Show("该名称已存在！");
return;
}
Names.Add(order[1]);
//计算子节点数量
TreeNode tn = treeView1.Nodes.Find(order[2], true).First();
int count = tn.GetNodeCount(false);
if (count == 8)
{
MessageBox.Show("文件数量达到上限！");
return;
}
/*查找父节点的起始盘块号*/
string path = "C:/Users/HP/Desktop/expriment/c++_vs/computer1/resource/disk.txt";
string name = "";
FileStream f = new FileStream(path, FileMode.Open, FileAccess.Read);
f.Seek(128, SeekOrigin.Begin);
int j = 128;
int store;//起始盘块号
while (true)