廢話不多說，我們先來認識一下這個GDI+，看看它到底長什么樣。
GDI+：Graphics Device Interface Plus也就是圖形設備接口,提供了各種豐富的圖形圖像處理功能;在C#.NET中，使用GDI+處理二維（2D）的圖形和圖像，使用DirectX處理三維（3D）的圖形圖像,圖形圖像處理用到的主要命名空間是System . Drawing：提供了對GDI+基本圖形功能的訪問，主要有Graphics類、Bitmap類、從Brush類繼承的類、Font類、Icon類、Image類、Pen類、Color類等.
大概了解了什么是GDI+后，我們直接用幾個示例，來向大家展示它能做什么吧。
1.畫一條直線
復制代碼代碼如下:
private void btnDrawLine_Click(object sender, EventArgs e)
{
//創建一個畫圖圖面
Graphics g = this.CreateGraphics();
//創建一只筆
Pen pen = new Pen(Brushes.Red);
//直線的兩個坐標
Point pointStart = new Point(10, 10);
Point pointEnd = new Point(50, 50);
//開始畫
g.DrawLine(pen, pointStart, pointEnd);
}
{
//創建一個畫圖圖面
Graphics g = this.CreateGraphics();
//創建一只筆
Pen pen = new Pen(Brushes.Red);
//直線的兩個坐標
Point pointStart = new Point(10, 10);
Point pointEnd = new Point(50, 50);
//開始畫
g.DrawLine(pen, pointStart, pointEnd);
}
2.畫一個矩形
復制代碼代碼如下:
private void btnDrawRectangle_Click(object sender, EventArgs e)
{
//創建一個畫圖圖面
Graphics g = this.CreateGraphics();
//創建一只筆
Pen pen = new Pen(Brushes.DeepSkyBlue);
//確定矩形的起點、長和高
g.DrawRectangle(pen, 50, 50, 60, 30);
}
{
//創建一個畫圖圖面
Graphics g = this.CreateGraphics();
//創建一只筆
Pen pen = new Pen(Brushes.DeepSkyBlue);
//確定矩形的起點、長和高
g.DrawRectangle(pen, 50, 50, 60, 30);
}
3.畫一個字符串
復制代碼代碼如下:
private void btnDrawString_Click(object sender, EventArgs e)
{
Graphics g = this.CreateGraphics();
Font font = new Font("華為宋體", 12);
//Point一樣，只是值是浮點類型
PointF point = new PointF(50, 50);
g.DrawString("我是Kimisme", font, Brushes.Coral, point);
}
{
Graphics g = this.CreateGraphics();
Font font = new Font("華為宋體", 12);
//Point一樣，只是值是浮點類型
PointF point = new PointF(50, 50);
g.DrawString("我是Kimisme", font, Brushes.Coral, point);
}
4.畫一個扇形
復制代碼代碼如下:
private void btnDrawSector_Click(object sender, EventArgs e)
{
Graphics g = this.CreateGraphics();
g.DrawPie(new Pen(Brushes.Green),
new Rectangle(new Point(100, 70),
new Size(50, 50)), 60, 90);
}
{
Graphics g = this.CreateGraphics();
g.DrawPie(new Pen(Brushes.Green),
new Rectangle(new Point(100, 70),
new Size(50, 50)), 60, 90);
}
