private void 格式化ToolStripMenuItem_Click(object sender, EventArgs e)
{
root_fcb = new FCB(0);
directory = new Directory();
folderStack = new Stack <FCB>();
Overall_bitMap = new My_BitMap();
current_directory = root_fcb;
UpdateView();
Console.WriteLine("执行格式化函数！");
FileStream fs = new FileStream("txtRecord\\Block.txt", FileMode.Truncate, FileAccess.Write);
//fs.Seek(0, SeekOrigin.Begin);
//fs.SetLength(0);
fs.Close();
FileStream fs02 = new FileStream("txtRecord\\BitMap.txt", FileMode.Truncate, FileAccess.Write);
//fs02.SetLength(0);
//fs02.Seek(0, SeekOrigin.Begin);
fs02.Close();
FileStream fs03 = new FileStream("txtRecord\\File.txt", FileMode.Truncate, FileAccess.Write);
//fs03.SetLength(0);
fs03.Close();
FileStream fs04 = new FileStream("txtRecord\\FCB.txt", FileMode.Truncate, FileAccess.Write);
//fs04.SetLength(0);
fs04.Close();
Format = true;
}