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();

}