C# GDI+使用操作、入门解析

以下这些是常用的基本操作,属于比较基础的入门知识,如果要往深了学这些仅仅是皮毛。希望对初学、和入门者有些帮助,同时也算是自我学习的一个总结。

先上个图:主界面:

C# GDI+使用操作、入门解析_第1张图片

第一:绘制带箭头线段

Pen p;
        Graphics g1;
        //绘制带箭头的直线
        private void button1_Click(object sender, EventArgs e)
        {
            g1 = this.CreateGraphics();
            g1.Clear(Color.White);
            p = new Pen(Color.YellowGreen, 8);
            p.StartCap = LineCap.Round;
            p.EndCap = LineCap.ArrowAnchor;
            g1.DrawLine(p, 150, 150, 500, 200);
          
        }

效果图:

C# GDI+使用操作、入门解析_第2张图片

第二:绘制艺术框

  ///


            /// 绘制艺术相框,主用用到了阴影画刷HatchBrush
            ///

            ///
            ///
        private void button2_Click(object sender, EventArgs e)
        {
            g1 = this.CreateGraphics();
            g1.Clear(Color.White);
            g1.FillRectangle(Brushes.LightBlue, this.ClientRectangle);//画板颜色
            HatchBrush hb = new HatchBrush(HatchStyle.WideDownwardDiagonal, Color.White, Color.Black);
            p = new Pen(hb, 10);
            g1.DrawRectangle(p, 300, 30, 80, 80);
        }

效果图:

C# GDI+使用操作、入门解析_第3张图片

第三:绘制特殊艺术图像

///

           /// 绘制特殊的渐变图形,主要用到GraphicsPath类的AddLines()方法           /// PathGradientBrush路径渐变画刷,PathGradientBrush的CenterColor属性           ///            ///                    ///          private void button3_Click(object sender, EventArgs e)         {             g1 = this.CreateGraphics();             g1.Clear(Color.White);             Point[] points ={ new Point(175,0),new Point(200,150),                              new Point(250,0),new Point(200,175),                              new Point(250,250),new  Point(165,200),                              new Point(0,250),new Point(135,175),                              new Point(0,150),new Point(150,150),                              new Point(175,0)                            };             GraphicsPath gPath = new GraphicsPath();//创建路径             gPath.AddLines(points); //在路径中添加直线             PathGradientBrush pGradientBrush = new PathGradientBrush(gPath);//路径渐变画刷             pGradientBrush.CenterColor = Color.Red;//设置中心点色彩             Color[] colors = new Color[]             {                 Color.Aqua,Color.Green,                 Color.Blue,Color.White,                 Color.Beige,Color.Green,                 Color.Blue,Color.White,                 Color.Black,Color.Green             };             pGradientBrush.SurroundColors = colors;//设置路径渐变画刷边缘色             g1.FillPath(pGradientBrush, gPath);  //填充路径

        }

效果图:

C# GDI+使用操作、入门解析_第4张图片

  

第四:绘制渐变图行

///


         /// 绘制渐变图形主要使用渐变画刷LinearGradientBrush类
         ///

         ///
         ///
        private void button4_Click(object sender, EventArgs e)
        {
            g1 = this.CreateGraphics();
            g1.Clear(Color.White);
            p = new Pen(Color.YellowGreen, 2);
            //LinearGradientBrush渐变画刷,可以实现简单线性渐变效果
            LinearGradientBrush linGrBrush1 = new LinearGradientBrush(new Rectangle(0, 0, 80, 40), Color.Red, Color.Yellow, 30.0f);
            g1.FillRectangle(linGrBrush1, new Rectangle(150, 20, 120, 120));  //填充指定矩形内部
            g1.DrawRectangle(p, new Rectangle(150, 20, 120, 120));
        }

效果图:

第五:绘制数学曲线C# GDI+使用操作、入门解析_第5张图片

///


         /// 绘制数学曲线Graphic.DrawBezier()数学曲线
         ///

         ///
         ///
        private void button5_Click(object sender, EventArgs e)
        {
            g1 = this.CreateGraphics();
            g1.Clear(Color.White);
            p = new Pen(Color.Black, 2);
            //绘制曲线
            g1.DrawBezier(p, new Point(20, 30), new Point(60, 0), new Point(200, 180), new Point(300, 200));
          
        }

效果图:

C# GDI+使用操作、入门解析_第6张图片

第六:图形缩放:

///


          /// 缩放图形 Graphics.ScaleTransform()缩放
          ///

          ///
          ///
        private void button6_Click(object sender, EventArgs e)
        {
            Bitmap bmp1 = new Bitmap(pictureBox1.Image);  //创建图形对象
            Bitmap bmp2 = new Bitmap(pictureBox1.Image);
            g1 = pictureBox2.CreateGraphics();           //创建画板
            g1.Clear(pictureBox2.BackColor);             //清空画板
            float s = Convert.ToSingle(0.5);             //缩放倍数
            g1.ScaleTransform(s, s);                     //缩放 ,图形缩放方法
            //重绘图形
            g1.DrawImage(bmp1, this.pictureBox2.ClientRectangle, 0, 0, bmp2.Width, bmp2.Height, GraphicsUnit.Pixel);
        }

效果图:

C# GDI+使用操作、入门解析_第7张图片

第七:图形旋转

///


        /// 图形的旋转Graphics.RotateTransform()函数
        ///

        ///
        ///
        private void button7_Click(object sender, EventArgs e)
        {
            Bitmap bmp1 = new Bitmap(pictureBox1.Image);
            Bitmap bmp2 = new Bitmap(pictureBox1.Image);
            g1 = pictureBox2.CreateGraphics();
            g1.Clear(pictureBox2.BackColor);
            g1.RotateTransform(30);  //旋转,使图形按照一定角度旋转
            g1.DrawImage(bmp1, this.pictureBox2.ClientRectangle, 0, 0, bmp2.Width, bmp2.Height, GraphicsUnit.Pixel);
        }

效果图:

C# GDI+使用操作、入门解析_第8张图片

第八:图形移动

  ///


           /// 图形平移
           ///

           ///
           ///
        private void button8_Click(object sender, EventArgs e)
        {
            Bitmap bmp1 = new Bitmap(pictureBox1.Image);
            Bitmap bmp2 = new Bitmap(pictureBox1.Image);
            g1 = pictureBox2.CreateGraphics();
            g1.Clear(pictureBox2.BackColor);
            float sx = Convert.ToSingle(20);
            float sy = Convert.ToSingle(20);
            g1.TranslateTransform(sx, sy);
            g1.DrawImage(bmp1, this.pictureBox2.ClientRectangle, 0, 0, bmp2.Width, bmp2.Height, GraphicsUnit.Pixel);
        }

效果图:

C# GDI+使用操作、入门解析_第9张图片

第九:图形动画
        /// 通过绘制线条,绘制动画
        ///
        ///
        ///
        private void button9_Click(object sender, EventArgs e)
        {
            g1 = pictureBox2.CreateGraphics();
            g1.Clear(pictureBox2.BackColor);
            Pen p1 = new Pen(Color.Blue);
            p = new Pen(Color.Red);
            int y = 256;
            for (int x = 0; x < 256; x += 5)
            {
                g1.DrawLine(p1, 0, y, x, 0);
                g1.DrawLine(p, 256, x, y, 256);
                y -= 5;
                Thread.Sleep(20);     //线程延迟20毫秒
            }
            for(y=0;y<256;y+=5)
            {
                Pen p2=new Pen (Color.FromArgb(y,Color.Yellow));
                g1.DrawLine(p2,0,y,256,y);
                Thread.Sleep(20);
            }
      

效果图:

第十:图像缩放C# GDI+使用操作、入门解析_第10张图片

///


        /// 图像放缩
        ///

        ///
        ///
        private void button10_Click(object sender, EventArgs e)
        {
            g1 = pictureBox2.CreateGraphics();
           
            g1.DrawImage(pictureBox1.Image, 80, 30, 150, 150);    //通过绘图方法实现图片的放缩
        }

效果图:

C# GDI+使用操作、入门解析_第11张图片

第十一:图像旋转

///


        /// 图像旋转Bitmap.RotateFlip()图像旋转方法
        ///

        ///
        ///
        private void button11_Click(object sender, EventArgs e)
        {
            Bitmap bmp = new Bitmap(pictureBox1.Image);
            bmp.RotateFlip(RotateFlipType.RotateNoneFlipX);//旋转,图像本身的旋转
                pictureBox2.Image=bmp;
        }

效果图:

C# GDI+使用操作、入门解析_第12张图片

你可能感兴趣的:(C#,GDI+)