<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

}