<winform>用StreamWriter实现恢复上次关闭时的状态

      在我上次编写的软件中，很简单实现了再次开始时，能显示上次关闭时的状态，只要就是用数据流将关闭时的状态写入文本中，在再次启动时将信息恢复。其中代码如下：

 public void btnClose_Click(object sender, EventArgs e)

        {

            state = textBox2.Text;

            bn[0] = btnClose.Enabled;

            bn[1] = btnStart.Enabled;

            bn[2] = btnStop.Enabled;

            bn[3] = btnReset.Enabled;

            bn[4] = timer1.Enabled;


            StreamWriter sw = new StreamWriter("d://a.text"); 

            sw.WriteLine(counter);

            sw.WriteLine(state);

            for (int i = 0; i < 5; i++)

            {

                sw.WriteLine(bn[i]);

            }

            sw.Close();                          //Keep records


            StreamWriter aw = new StreamWriter("d://c.text");

            aw.WriteLine("0");

            aw.Close();                        //Send close information



            Close();

        }

再次启动时，先是判断上次关闭是否有文件留下，接着若是有就将信息写入状态中，如果没有当然就不，代码如下：

 if (!File.Exists(@"d://a.text"))

            {

                btnClose.Enabled = bn[0];

                btnStart.Enabled = bn[1];

                btnStop.Enabled = bn[2];

                btnReset.Enabled = bn[3];

                timer1.Enabled = bn[4];      //Initial value

            }

            else

            {

                StreamReader sr = new StreamReader("d://a.text");

                counter  = Convert.ToInt32(sr.ReadLine());

                textBox2.Text = sr.ReadLine();

                btnClose.Enabled = Convert.ToBoolean(sr.ReadLine());

                btnStart.Enabled = Convert.ToBoolean(sr.ReadLine());

                btnStop.Enabled = Convert.ToBoolean(sr.ReadLine());

                btnReset.Enabled = Convert.ToBoolean(sr.ReadLine());

                timer1.Enabled = Convert.ToBoolean(sr.ReadLine());

                sr.Close();

                textBox1.Text = Convert.ToString(counter);   //Historical value




            }