本文是利用c# 开发截图软件的小例子,以供学习分享使用。
思路:
涉及的知识点:
效果图如下【主要实现了截图,保存,复制,画矩形,笔触,荧光笔,橡皮擦等功能】:
保存后图片如下:
-------------------------------------------------------------------------------------------------------------------------------
核心代码如下:
截取屏幕图像:
public bitmap getscreen() { //获取整个屏幕图像,不包括任务栏 rectangle screenarea = screen.getworkingarea(this); bitmap bmp = new bitmap(screenarea.width, screenarea.height); using (graphics g = graphics.fromimage(bmp)) { g.copyfromscreen(0, 0, 0, 0, new size(screenarea.width,screenarea.height)); } return bmp; }
绘制图形功能:
#region 绘制功能 protected override void onpaint(painteventargs pe) { base.onpaint(pe); graphics g = pe.graphics; drawhistory(g); //绘制当前线 if (startdraw && this.curline.pointlist != null && this.curline.pointlist.count > 0) { drawline(g,this.curline); } if (startdraw && this.currect.start != null && this.currect.end != null && this.currect.start != this.currect.end) { drawrectangle(g, this.currect); } } public void drawhistory(graphics g) { //绘制线历史记录 if (linehistory != null) { foreach (hline lh in linehistory) { if (lh.pointlist.count > 10) { drawline(g, lh); } } } //绘制矩形历史记录 if (recthistory != null) { foreach (hrectangle lh in recthistory) { if (lh.start!=null&& lh.end!=null && lh.start!=lh.end) { drawrectangle(g, lh); } } } } /// <summary> /// 绘制线 /// </summary> /// <param name="g"></param> /// <param name="line"></param> private void drawline(graphics g,hline line) { g.smoothingmode = smoothingmode.antialias; using (pen p = new pen(line.linecolor, line.linewidth)) { //设置起止点线帽 p.startcap = linecap.round; p.endcap = linecap.round; //设置连续两段的联接样式 p.linejoin = linejoin.round; g.drawcurve(p, line.pointlist.toarray()); //画平滑曲线 } } /// <summary> /// 绘制矩形 /// </summary> /// <param name="g"></param> /// <param name="rect"></param> private void drawrectangle(graphics g, hrectangle rect) { g.smoothingmode = smoothingmode.antialias; using (pen p = new pen(rect.linecolor, rect.linewidth)) { //设置起止点线帽 p.startcap = linecap.round; p.endcap = linecap.round; //设置连续两段的联接样式 p.linejoin = linejoin.round; g.drawrectangle(p, rect.start.x, rect.start.y, rect.end.x - rect.start.x, rect.end.y - rect.start.y); //画平滑曲线 } } public void earser(point p0) { for (int i = linehistory.count - 1; i >= 0; i--) { hline line = linehistory[i]; bool flag = false; foreach (point p1 in line.pointlist) { double distance = getdistance(p0, p1); if (math.abs(distance) < 6) { //需要删除 flag = true; break; } } if (flag) { linehistory.removeat(i); } } //擦除矩形 for (int i = recthistory.count - 1; i >= 0; i--) { hrectangle rect = recthistory[i]; if (p0.x>rect.start.x && p0.x<rect.end.x && p0.y > rect.start.y && p0.y < rect.end.y) { recthistory.removeat(i); } } } /// <summary> /// 获取两点之间的距离 /// </summary> /// <param name="p0"></param> /// <param name="p1"></param> /// <returns></returns> private double getdistance(point p0, point p1) { return math.sqrt(math.pow((p0.x - p1.x), 2) + math.pow((p0.y - p1.y), 2)); } #endregion
以下是源码功能连接,需要的朋友可以自行下载。
以上所述是小编给大家介绍的c# 实现截图软件功能实例代码,希望对大家有所帮助
如对本文有疑问, 点击进行留言回复!!
使用Visual Studio2019创建C#项目(窗体应用程序、控制台应用程序、Web应用程序)
C#实现获取本地内网(局域网)和外网(公网)IP地址的方法分析
网友评论