winform 单选框， 图像控件，图像列表，状态栏，定时器，绘图

        private void button8_Click(object sender, EventArgs e)
        {
            if(radioButton1.Checked)
            {
                MessageBox.Show("第一个");
            }
            else if(radioButton2.Checked)
            {
                MessageBox.Show("第二个");
            }
            else if(radioButton3.Checked)
            {
                MessageBox.Show("第三个");
            }
        }
        public void showpic()
        {
            pictureBox1.Image = Image.FromFile(System.Environment.GetFolderPath(System.Environment.SpecialFolder.Personal) + @"\image.jpg");
            pictureBox1.SizeMode = System.Windows.Forms.PictureBoxSizeMode.StretchImage;
        }
        private void pictureBox1_Click(object sender, EventArgs e)
        {
            if(pictureBox1.Image != null)//不为空
            {
                pictureBox1.Image.Dispose();
                pictureBox1.Image = null;
            }
            else
            {
                showpic();
            }
        }

        private void tabControl1_SelectedIndexChanged(object sender, EventArgs e)
        {
            label8.Text = "当前操作统计信息为：页面为第" + this.tabControl1.SelectedIndex.ToString() + "页，选项卡为" + tabControl1.SelectedTab.Text + ",共有页数" + tabControl1.TabCount.ToString();
            label8.Visible = true;
        }

        private void button10_Click(object sender, EventArgs e)
        {
            progressBar1.Visible = true;
            progressBar1.Minimum = 0;
            progressBar1.Maximum = 100;
            progressBar1.BackColor = Color.Red;
            for(int i=0; i<100;i++)
            {
                progressBar1.Value++;
                this.label9.Text = progressBar1.Value.ToString();     //有bug
            }
        }

        private void button11_Click(object sender, EventArgs e)
        {
            toolStripStatusLabel1.Text = "字数信息是： " + richTextBox1.Text.Length;
        }

        private void button12_Click(object sender, EventArgs e)
        {
            timer1.Start();
        }

        private void button13_Click(object sender, EventArgs e)
        {
            timer1.Stop();
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            pictureBox1.Left -= 5;// pictureBox1.Left -= 5; 语句是错误的
            if(pictureBox1.Right<0)
            {
                pictureBox1.Left = Width;

            }
        }
        //直线
        private void button14_Click(object sender, EventArgs e)
        {
            Graphics g = this.CreateGraphics();
            Pen p = new Pen(Color.Black);
            g.DrawLine(p, 0, this.Height / 2, this.Width, this.Height / 2);
            p.Dispose();
            g.Dispose();

        }
        //圆
        private void button15_Click(object sender, EventArgs e)
        {
            Graphics g = this.CreateGraphics();
            Pen p = new Pen(Color.Black);

            Rectangle r = new Rectangle(200, 200, 200, 200);//圆
            LinearGradientBrush brush = new LinearGradientBrush(r,Color.Orange,Color.Purple,90);//画刷
            g.FillEllipse(brush, r);//用画
            brush.Dispose();
            //g.DrawEllipse(p, 600, 250, 100, 100);
            p.Dispose();
            g.Dispose(); 
        }
        //矩形
        private void button16_Click(object sender, EventArgs e)
        {
            Graphics g = this.CreateGraphics();
            Pen p = new Pen(Color.Red,3);//笔刷的宽度
            Brush b = p.Brush;//用画笔作为笔刷
           // g.DrawRectangle(p, 500, 250, 200, 100);//长200，高100，
            Rectangle r = new Rectangle(400, 200, 200, 100);
            g.FillRectangle(b, r);
            b.Dispose();
            p.Dispose();
            g.Dispose(); 
        }
        //圆柱
        private void button17_Click(object sender, EventArgs e)
        {
            int height = this.ClientSize.Height - 100;
            int width = this.ClientSize.Width - 50;
            int vHeigth = 200;
            int vWidth = 100;
            Graphics g = this.CreateGraphics();
            g.Clear(Color.White);
            Pen pen = new Pen(Color.Gray);
            SolidBrush brush = new SolidBrush(Color.Gainsboro);
            for(int i=height/2;i>0;i--)
            {
                g.DrawEllipse(pen, width / 2, i, vHeigth, vWidth);

            }
            g.FillEllipse(brush,width/2,0,vHeigth,vWidth);//填充的时候用brush
        }
        //字体
        private void button18_Click(object sender, EventArgs e)
        {
            Graphics g = this.CreateGraphics();//图像对象
            Font f = new Font("隶书",24,FontStyle.Italic);//字体
            Pen p = new Pen(Color.Blue);//画笔
            g.DrawString("Windows应用程序设计", f, p.Brush, 50, 50);

            p.Dispose();
            f.Dispose();
            g.Dispose();       
        }
        //绘制新界面
        private void mainform_Paint(object sender, PaintEventArgs e)
        {
            Graphics g = this.CreateGraphics();//图像
            g.Clear(Color.White);//
            Pen myPen = new Pen(Color.Red, 3);//画笔
            g.DrawRectangle(myPen, 600, 200, 200, 100);//矩形
            g.DrawEllipse(myPen, 600, 200, 200, 100);//填充
            g.Dispose();
            myPen.Dispose();
        }
        //坐标平移
        private void button19_Click(object sender, EventArgs e)
        {
            Graphics g = this.CreateGraphics();//图像
            g.Clear(Color.White);//
            Pen myPen = new Pen(Color.Red, 3);//画笔
            g.TranslateTransform(30,120);//坐标平移，转换
            g.DrawRectangle(myPen, 600, 200, 200, 100);
            g.DrawEllipse(myPen, 600, 200, 200, 100);//填充


            g.Dispose();
            myPen.Dispose();

        }
        //坐标缩放
        private void button20_Click(object sender, EventArgs e)
        {
            Graphics g = this.CreateGraphics();//图像
            g.Clear(Color.White);//
            Pen myPen = new Pen(Color.Red, 3);//画笔

            g.ScaleTransform(1, 2);// g.ScaleTransform(1.5 , 2);1.5不行！

          //  g.TranslateTransform(30, 120);//坐标平移，转换
            g.DrawRectangle(myPen, 600, 200, 200, 100);
            g.DrawEllipse(myPen, 600, 200, 200, 100);//填充


            g.Dispose();
            myPen.Dispose();
        }
        //图片上加文字
        private void button21_Click(object sender, EventArgs e)
        {
            Graphics g = Graphics.FromImage(pictureBox2.Image);
            Font f = new Font("隶书",80,FontStyle.Italic);
            Pen p = new Pen(Color.OrangeRed);
            g.DrawString("花开花落",f,p.Brush,0,0);
            p.Dispose();
            g.Dispose();
            pictureBox2.Refresh();//刷新
            //pictureBox2.Image.Save(iamg);
        }
        //创建位图
        private void button22_Click(object sender, EventArgs e)
        {
            Bitmap bm = new Bitmap(this.ClientSize.Width, this.ClientSize.Height,
                System.Drawing.Imaging.PixelFormat.Format32bppArgb);//创建位图图像
            Graphics g = Graphics.FromImage(bm);//图像对象

            Font font = new Font("隶书",80,FontStyle.Italic);//字体
            Pen pen = new Pen(Color.OrangeRed);//画笔
            g.DrawString("winddows application disigner",font,pen.Brush,0,0);//写文字
            pictureBox2.Image = bm;//加载图像
            //bm.Save()
            pen.Dispose();
            g.Dispose();

        }