public FileEditor(ref BitMap bitMap, ref File file)
{
InitializeComponent();
bitmap = bitMap;
textFile = file;
showContent();
}
//清空文件块
public void setEmpty(ref BitMap bitmap)
{
for (int i = 0; i < fcb.blocklist.Count(); i += 1)
{
bitmap.setFree(bitmap.findFreeBlock()); //置该块为空闲
}
fcb.blocklist.Clear(); //清空块链表
fcb.fileSize = 0; //文件大小置为0
}
//写文件
public void write(String data, ref BitMap bitmap)
{
setEmpty(ref bitmap);
while (data.Count() > 512)
{
bitmap.blocks[bitmap.findFreeBlock()] = new Block();
bitmap.blocks[bitmap.findFreeBlock()].setData(data.Substring(0, 512)); //每次截取512个字符加入寻找到的块中
fcb.blocklist.Add(bitmap.blocks[bitmap.findFreeBlock()]); //将块加入块链表
bitmap.setOccupy(bitmap.findFreeBlock()); //置此块为占用状态
fcb.fileSize += 512;
data = data.Remove(0, 512);
}
bitmap.blocks[bitmap.findFreeBlock()] = new Block();
bitmap.blocks[bitmap.findFreeBlock()].setData(data);
fcb.blocklist.Add(bitmap.blocks[bitmap.findFreeBlock()]); //将块加入块链表
bitmap.setOccupy(bitmap.findFreeBlock());
fcb.fileSize += data.Length;
fcb.updatedTime = DateTime.Now;
}
//反序列化
private void BinaryDeserialize()
{
FileStream fileStream2, fileStream3;
BinaryFormatter bf = new BinaryFormatter();
//fileStream1 = new FileStream(System.IO.Path.Combine(dir, "root_node.dat"), FileMode.Open, FileAccess.Read, FileShare.Read);
//root_node = bf.Deserialize(fileStream1) as Node;
//fileStream1.Close();
bool rootb = System.IO.File.Exists(System.IO.Path.Combine(dir, "root_catalog.dat"));
if (System.IO.File.Exists(System.IO.Path.Combine(dir, "root_catalog.dat")) && System.IO.File.Exists(System.IO.Path.Combine(dir, "bitmap.dat")))
{
fileStream2 = new FileStream(System.IO.Path.Combine(dir, "root_catalog.dat"), FileMode.Open, FileAccess.Read, FileShare.Read);
root_catalog = bf.Deserialize(fileStream2) as Catalog;
fileStream2.Close();
fileStream3 = new FileStream(System.IO.Path.Combine(dir, "bitmap.dat"), FileMode.Open, FileAccess.Read, FileShare.Read);
bitmap = bf.Deserialize(fileStream3) as BitMap;
fileStream3.Close();
}
}
