Timer时间问题。。。。。。。

Question

为什么读条的百分比是负数。
public Form1()
        {
            InitializeComponent();
        }        private void button1_Click(object sender, EventArgs e)
        {
            if (timer1.Enabled == true)
            {
                timer1.Enabled = false;
                button1.Text = "开始";
            }
            else
            {
                timer1.Enabled = true;
                button1.Text = "停止";
            }
        }        private void timer1_Tick(object sender, EventArgs e)
        {
            if (this.progressBar1.Value == this.progressBar1.Maximum)
            {
                this.progressBar1.Value = this.progressBar1.Minimum;
            }
            else
            {
                this.progressBar1.PerformStep();
            }
            int intPercent;
            intPercent = 100 * (this.progressBar1.Value - this.progressBar1.Maximum)/(this.progressBar1.Maximum-this.progressBar1.Minimum);
            label1.Text=Convert.ToInt16(intPercent).ToString()+"%";
        }

Answer 1

this.progressBar1.Value - this.progressBar1.Maximum这个不是负数是什么?

Answer 2

intPercent = 100 * (double)(this.progressBar1.Value - this.progressBar1.Maximum)/100;

Answer 3

直接写：label1.Text= this.progressBar1.Value.ToString() +"%";

Answer 4

Maximum 默认值 100
Minimum 默认值 0

Answer 5

msdn
Maximum 
Minimum 

Answer 6

public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }        private void button1_Click(object sender, EventArgs e)
        {
            if (timer1.Enabled == true)
            {
                timer1.Enabled = false;
                button1.Text = "开始";
            }
            else
            {
                timer1.Enabled = true;
                button1.Text = "停止";
            }
        }        private void timer1_Tick(object sender, EventArgs e)
        {
            if (this.progressBar1.Value == this.progressBar1.Maximum)
            {
                this.progressBar1.Value = this.progressBar1.Minimum;
            }
            else
            {
                this.progressBar1.PerformStep();
            }
            label1.Text=this.progressBar1.Value.ToString()+"%";
        }
    }
另外在吗写能让读条慢点