wpf使用进度条，趣味学习

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace 进度条Again
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            button1.Enabled = false;
            button2.Enabled = false;
            button3.Enabled = false;
        }
        private bool isok=true;
        private void button1_Click(object sender, EventArgs e)//开始按钮
        {
            if(string.IsNullOrWhiteSpace(textBox1.Text))
            {
                return;
            }
            else
            {
                button2.Enabled = true;
                button3.Enabled = true;
                toolStripProgressBar1.Value = 0;//进度条当前值为0
                toolStripProgressBar1.Minimum = 0;//进度条最小值为0
                toolStripProgressBar1.Maximum = Convert.ToInt32(textBox1.Text);//进度条最大值为文本框1输入的数
                timer1.Enabled = true;
            }
        }

        private void textBox1_TextChanged(object sender, EventArgs e)//当文本框1文本改变的时候button1才可以用
        {
            button1.Enabled = true;
        }

        private void button2_Click(object sender, EventArgs e)//暂停
        {
            if (button2.Text == "暂停")
            {
                timer1.Enabled = false;
                button2.Text = "继续";
                textBox2.AppendText(DateTime.Now.ToString("HH:mm:ss") + "进度暂停" + "\r\n");
            }
            else
            {
                timer1.Enabled = true;
                button2.Text = "暂停";
                textBox2.AppendText(DateTime.Now.ToString("HH:mm:ss") + "进度继续" + "\r\n");
            }

        }

        private void button3_Click(object sender, EventArgs e)//停止
        {
            timer1.Enabled = false;
            toolStripProgressBar1.Value = 0;
            textBox2.Text = "";
            textBox1.Text = "";
            button1.Enabled = false;
            button2.Enabled = false;
            button3.Enabled = false;

        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            if (toolStripProgressBar1.Value < toolStripProgressBar1.Maximum)//如果进度条当前的值小于进度条最大的值
            {
                toolStripProgressBar1.Value++;//就把进度条的当前值++
                textBox2.AppendText(DateTime.Now.ToString("HH:mm:ss") + "当前进度为[" + toolStripProgressBar1.Value + "/" + toolStripProgressBar1.Maximum + "]...." + "\r\n");//拼接字符串

            }
            else
            {
                textBox2.Text = "";
            }
        }

        private void button4_Click(object sender, EventArgs e)
        {
            this.Close();
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }
    }
}