C#—实验11—GDI编程—1、2、4

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 WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

private void Form1_Load(object sender, EventArgs e)
{

}

private void button1_Click(object sender, EventArgs e)
{
Form2 fr = new Form2();
fr.Show();
}

private void button2_Click(object sender, EventArgs e)
{
Form3 fr3 = new Form3();
fr3.Show();
}

private void button3_Click(object sender, EventArgs e)
{
Form4 fr4 = new Form4();
fr4.Show();
}

private void button4_Click(object sender, EventArgs e)
{
Form5 fr5 = new Form5();
fr5.Show();
}
}
}

/*
* 编写一个能够显示正弦曲线的Windows应用程序。
*/
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;
using System.Drawing.Drawing2D;

namespace WindowsFormsApplication1
{
public partial class Form2 : Form
{
public Form2()
{
InitializeComponent();
}

private void Form2_Paint(object sender, PaintEventArgs e)
{
Graphics g = e.Graphics;
Pen p = new Pen(Color.Black, 1.0f);
p.EndCap = LineCap.ArrowAnchor;
g.DrawLine(p, new Point(50, 150), new Point(250, 150));
Pen p1 = new Pen(Color.Black, 1.0f);
p1.StartCap = LineCap.ArrowAnchor;
g.DrawLine(p1, 150, 50, 150, 250);
Pen p2 = new Pen(Color.Black, 1.0f);
Point[] points = { new Point(50, 100), new Point(100, 200), new Point(200, 100), new Point(250, 200) };
g.DrawCurve(p2, points, 0.8f);
}
}
}

//编写一个Windows应用程序，实现从白色到绿色渐变的背景。
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;
using System.Drawing.Drawing2D;

namespace WindowsFormsApplication1
{
public partial class Form3 : Form
{
public Form3()
{
InitializeComponent();
}

private void Form3_Paint(object sender, PaintEventArgs e)
{
Graphics g = e.Graphics;
LinearGradientBrush brush = new LinearGradientBrush(this.ClientRectangle, Color.White, Color.Green, LinearGradientMode.Vertical);
g.FillRectangle(brush, this.ClientRectangle);
g.Dispose();
}
}
}

/*
* 编写一个应用程序，利用Graphics对象的DrawString方法在窗体上绘制文字“山东省烟台大学”，要求文字用一副图片填充。
*/
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;
using System.Drawing.Drawing2D;

namespace WindowsFormsApplication1
{
public partial class Form5 : Form
{
public Form5()
{
InitializeComponent();
}

private void Form5_Paint(object sender, PaintEventArgs e)
{
Graphics g = e.Graphics;
Image imag = Image.FromFile(Application.StartupPath + @"\20.png");
TextureBrush brush = new TextureBrush(imag);
Font font = new Font("楷体", 25, FontStyle.Underline ^ FontStyle.Bold);
g.DrawString("山东省烟台大学", font, brush, new Point(10, 100));
}
}
}