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;
        }