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本篇内容主要讲解“C#画直线的实现方法”，感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷，实用性强。下面就让小编来带大家学习“C#画直线的实现方法”吧!
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C#画直线的操作有的时候我们会在实际开发遇到这样的需求，那么C#画直线是如何实现的呢？这里我们来看看具体的实现代码，通过代码的介绍希望对你的开发有所帮助。
C#画直线实现实例：
//以下是完整代码，可以直接编译运行 //-----C#画直线--------- using System; using System.Collections.Generic; using System.Windows.Forms; using System.Drawing; namespace q2 { static class Program { /// ﹤summary﹥ /// 应用程序的主入口点。 /// ﹤/summary﹥ [STAThread] static void Main() { Application.EnableVisualStyles(); Application.SetCompatibleTextRenderingDefault(false); Application.Run(new Form1()); } } /// ﹤summary﹥ /// 线条对象 /// ﹤/summary﹥ class Line { /// ﹤summary﹥ /// 建立线条对象，并设置起点 /// ﹤/summary﹥ /// ﹤param name="startPoint"﹥此线条的起点﹤/param﹥ public Line(Point startPoint) { StartPoint = startPoint; EndPoint = startPoint; } public Point StartPoint = Point.Empty; public Point EndPoint = Point.Empty; } public class DrawPanel : Control { public DrawPanel() { this.DoubleBuffered = true; this.SetStyle( ControlStyles.OptimizedDoubleBuffer | ControlStyles.ResizeRedraw, true); } } /// ﹤summary﹥ /// C#画直线之窗口定义 /// ﹤/summary﹥ public class Form1 : Form { public Form1() { drawPanel.BackColor = Color.White; drawPanel.Cursor = Cursors.Cross; drawPanel.Dock = DockStyle.Fill; drawPanel.MouseDown += new MouseEventHandler(drawPanel_MouseDown); drawPanel.MouseUp += new MouseEventHandler(drawPanel_MouseUp); drawPanel.MouseMove += new MouseEventHandler(drawPanel_MouseMove); drawPanel.Paint += new PaintEventHandler(drawPanel_Paint); Controls.Add(drawPanel); } /// ﹤summary﹥ /// C#画直线之用于保存绘出线条的集合 /// ﹤/summary﹥ private List﹤Line﹥ lines = new List﹤Line﹥(); /// ﹤summary﹥ /// 用于保存当前正在绘制的线条 /// ﹤/summary﹥ private Line drawingLine = null; /// ﹤summary﹥ /// 用于显示绘图的面板组件 /// ﹤/summary﹥ private DrawPanel drawPanel = new DrawPanel(); /// ﹤summary﹥ /// 在绘图区释放鼠标，结束当前线条绘制 /// ﹤/summary﹥ /// ﹤param name="sender"﹥﹤/param﹥ /// ﹤param name="e"﹥﹤/param﹥ void drawPanel_MouseUp(object sender, MouseEventArgs e) { if (drawingLine == null) return; drawingLine.EndPoint = e.Location; drawingLine = null; } /// ﹤summary﹥ /// 在绘图区按下鼠标，开始绘制新线条 /// ﹤/summary﹥ /// ﹤param name="sender"﹥﹤/param﹥ /// ﹤param name="e"﹥﹤/param﹥ void drawPanel_MouseDown(object sender, MouseEventArgs e) { drawingLine = new Line(e.Location); lines.Add(drawingLine); } ///C#画直线 /// ﹤summary﹥ /// 在绘图区移动鼠标时，如果正在绘制新线条，就更新绘制面板 /// ﹤/summary﹥ /// ﹤param name="sender"﹥﹤/param﹥ /// ﹤param name="e"﹥﹤/param﹥ void drawPanel_MouseMove(object sender, MouseEventArgs e) { if(drawingLine != null) { drawingLine.EndPoint = e.Location; drawPanel.Invalidate(); } } /// ﹤summary﹥ /// 绘制效果到面板 /// ﹤/summary﹥ /// ﹤param name="sender"﹥﹤/param﹥ /// ﹤param name="e"﹥﹤/param﹥ void drawPanel_Paint(object sender, PaintEventArgs e) { Bitmap bp = new Bitmap( drawPanel.Width, drawPanel.Height); // 用于缓冲输出的位图对象 Graphics g = Graphics.FromImage(bp); g.SmoothingMode = System.Drawing.Drawing2D. SmoothingMode.AntiAlias; // 消锯齿（可选项） Pen p = new Pen(Color.Black); foreach (Line line in lines) { if (line == drawingLine) { // 当前绘制的线条是正在鼠标定位的线条 p.Color = Color.Blue; } else { p.Color = Color.Black; } g.DrawLine(p, line.StartPoint, line.EndPoint); } // 将缓冲位图绘制到输出 e.Graphics.DrawImage(bp, Point.Empty); } } } //C#画直线到此，相信大家对“C#画直线的实现方法”有了更深的了解，不妨来实际操作一番吧！这里是创新互联网站，更多相关内容可以进入相关频道进行查询，关注我们，继续学习！
