今天小编给大家分享一下C#如何实现图形界面的时钟的相关知识点，内容详细，逻辑清晰，相信大部分人都还太了解这方面的知识，所以分享这篇文章给大家参考一下，希望大家阅读完这篇文章后有所收获，下面我们一起来了解一下吧。
秒针有跳跃两个格子问题，主要是算法耗时没考虑在TimeTicker的触发事件内，导致程序运行有延迟。
时间运行正确（获取的系统时间）。
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 Cool_Graphics
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
Point center;
private void Form1_Load(object sender, EventArgs e)
{
lastFormSize = this.Size;
initPicBox();
timer1.Interval = welcomeTime / welcomeSplits;
timer1.Enabled = true;
}
private void initPicBox()
{
//清空面板，找中心点
center = new Point(pictureBox1.Width / 2, pictureBox1.Height / 2);
pictureBox1.Image = new Bitmap(pictureBox1.Width, pictureBox1.Height);
Graphics g = Graphics.FromImage(pictureBox1.Image);
g.FillRectangle(Brushes.White, new Rectangle(0, 0, pictureBox1.Width, pictureBox1.Height));
//按窗口大小，自动设置表盘适宜半径
r = pictureBox1.Width < pictureBox1.Height ? (pictureBox1.Width / 2 - margin) : (pictureBox1.Height / 2 - margin);
//默认相对r比例设置 其他值
circle_width = GetRelativeValue(r, 100);
pFlag1_length = GetRelativeValue(r, 25);
pFlag1_width = GetRelativeValue(r, 80);
pFlag2_length = GetRelativeValue(r, 50);
pFlag2_width = GetRelativeValue(r, 250);
second_length = GetRelativeValue(r, 1.15);
second_tailLen = GetRelativeValue(r, 5);
second_width = GetRelativeValue(r, 250);
minute_length = GetRelativeValue(r, 250.0 / 190.0);//分针长度
minute_width = GetRelativeValue(r, 250.0 / 2.0);//分针宽度
hour_length = GetRelativeValue(r, 250.0 / 160.0);//时针长度
hour_width = GetRelativeValue(r, 250.0 / 3.0);//时针宽度
center_r = GetRelativeValue(r, 250.0 / 4.0);//表盘中心点半径
}
int shanxinNum = 0;
private void timer1_Tick(object sender, EventArgs e)
{
Graphics g = Graphics.FromImage(pictureBox1.Image);
g.FillPie(new SolidBrush(Color.FromArgb(shanxinNum + 90, shanxinNum * 2 + 10, shanxinNum * 3 + 50)), center.X - r, center.Y - r, r * 2, r * 2, shanxinNum * 360 / welcomeSplits, 360 / welcomeSplits);
if (shanxinNum++ > welcomeSplits / 2)
{
timer2.Interval = 1000;
timer2.Enabled = true;
}
if (shanxinNum > welcomeSplits - 1)
{
shanxinNum = 0;
timer1.Enabled = false;
}
pictureBox1.Refresh();
}
int welcomeTime = 1000;//欢迎界面时间 ms
int welcomeSplits = 60;//欢迎界面的切割个数
int margin = 10;//表盘外边距
int r = 250;//表盘半径
Color bg_color = Color.White;//背景色
Color circle_bg_color = Color.LightBlue;//圆盘背景色
float circle_width = 2;//外表盘圆宽度
Color circle_color = Color.Black;//外表盘圆颜色
float pFlag1_length = 10;//圆盘外部格标志1长度
float pFlag1_width = 3;//圆盘外部格标志1宽度
Color pFlag1_color = Color.Black;//圆盘外部格标志1颜色
float pFlag2_length = 5;//圆盘外部格标志2长度
float pFlag2_width = 1; //圆盘外部格标志2宽度
Color pFlag2_color = Color.Black;//圆盘外部格标志2颜色
float pSLine_length = 20;//下吊坠线长度
float pSLine_width = 1;//下吊坠线长度
Color pSLine_color = Color.Red;//下吊坠线长度
float second_length = 200;//秒针长度
float second_tailLen = 50;//秒针尾巴长度
float second_width = 1;//秒针宽度
Color second_color = Color.Red;//秒针颜色
float minute_length = 190;//分针长度
float minute_width = 2;//分针宽度
Color minute_color = Color.DarkGreen;//分针颜色
float hour_length = 160;//时针长度
float hour_width = 3;//时针宽度
Color hour_color = Color.DarkBlue;//时针颜色
float center_r = 4;//表盘中心点半径
Color center_color = Color.Black;//圆心点颜色
private void timer2_Tick(object sender, EventArgs e)
{
//Console.WriteLine(DateTime.Now.Millisecond);
// timer2.Enabled = false;
Graphics g = Graphics.FromImage(pictureBox1.Image);
//面板清空
g.FillRectangle(new SolidBrush(bg_color), new Rectangle(0, 0, pictureBox1.Width, pictureBox1.Height));
//画圆盘背景
g.FillEllipse(new SolidBrush(circle_bg_color), center.X - r, center.Y - r, r * 2, r * 2);
//画表盘外框圆
g.DrawEllipse(new Pen(circle_color, circle_width), center.X - r, center.Y - r, r * 2, r * 2);
//话表盘格
double span = Math.PI / 30;//每个格子间隔弧度值
for (float i = 0; i < 60; i++)
{
PointF p1 = new PointF(center.X + r * (float)Math.Sin(i * span), center.Y - r * (float)Math.Cos(i * span));
PointF p2;
PointF ps2;
if (i % 5 == 0)
{
p2 = new PointF(center.X + (r - pFlag1_length) * (float)Math.Sin(i * span), center.Y - (r - pFlag1_length) * (float)Math.Cos(i * span));
g.DrawLine(new Pen(pFlag1_color, pFlag1_width), p1, p2);
/* ps2 = new PointF(p1.X,p1.Y+pSLine_length);
g.DrawLine(new Pen(pSLine_color, pSLine_width), p1, ps2);*/
}
else
{
p2 = new PointF(center.X + (r - pFlag2_length) * (float)Math.Sin(i * span), center.Y - (r - pFlag2_length) * (float)Math.Cos(i * span));
g.DrawLine(new Pen(pFlag2_color, pFlag2_width), p1, p2);
}
}
//获取当前时间
DateTime time = DateTime.Now;
float millisecond = (float)time.Millisecond;
float second = time.Second + millisecond / 1000;
float minute = time.Minute + second / 60;
float hour = time.Hour + minute / 60;
PointF tempPF;
//画时针
tempPF = new PointF(center.X + hour_length * (float)Math.Sin(hour * 5 * span), center.Y - hour_length * (float)Math.Cos(hour * 5 * span));
g.DrawLine(new Pen(hour_color, hour_width), center, tempPF);
//画分针
tempPF = new PointF(center.X + minute_length * (float)Math.Sin(minute * span), center.Y - minute_length * (float)Math.Cos(minute * span));
g.DrawLine(new Pen(minute_color, minute_width), center, tempPF);
//画秒针
if (timer2.Interval == 1000)
{
second = time.Second;
}
tempPF = new PointF(center.X + second_length * (float)Math.Sin(second * span), center.Y - second_length * (float)Math.Cos(second * span));
PointF tailP = new PointF(center.X - second_tailLen * (float)Math.Sin(second * span), center.Y + second_tailLen * (float)Math.Cos(second * span));
g.DrawLine(new Pen(second_color, second_width), tailP, tempPF);
画秒针附加效果
//for (int i = 1; i < 256; i++)
//{
// tempPF = new PointF(center.X + second_length * (float)Math.Sin((second - i * 0.02) * span), center.Y - second_length * (float)Math.Cos((second - i * 0.02) * span));
// tailP = new PointF(center.X - second_tailLen * (float)Math.Sin((second - i * 0.02) * span), center.Y + second_tailLen * (float)Math.Cos((second - i * 0.02) * span));
// g.DrawLine(new Pen(Color.FromArgb(255,i,i), second_width), tailP, tempPF);
//}
画毫秒针
//tempPF = new PointF(center.X + second_length * (float)Math.Sin(millisecond * span * 60 / 1000), center.Y - second_length * (float)Math.Cos(millisecond * span * 60 / 1000));
//tailP = new PointF(center.X - second_tailLen * (float)Math.Sin(millisecond * span * 60 / 1000), center.Y + second_tailLen * (float)Math.Cos(millisecond * span * 60 / 1000));
//g.DrawLine(new Pen(second_color, second_width), tailP, tempPF);
//画中心点
g.FillEllipse(new SolidBrush(center_color), center.X - center_r, center.Y - center_r, center_r * 2, center_r * 2);
pictureBox1.Refresh();
//timer2.Enabled = true;
}
private float GetRelativeValue(float src, double ratio)
{
return src / (float)ratio > 1 ? src / (float)ratio : 1;
}
Size lastFormSize;
private void Form1_ResizeEnd(object sender, EventArgs e)
{
if (this.Size == lastFormSize)
return;
timer2.Enabled = false;
shanxinNum = 0;
initPicBox();
timer1.Interval = 17;
timer1.Enabled = true;
}
FormWindowState lastState = FormWindowState.Normal;
private void Form1_SizeChanged(object sender, EventArgs e)
{
if (this.WindowState != lastState)
{
lastState = this.WindowState;
timer2.Enabled = false;
shanxinNum = 0;
initPicBox();
timer1.Interval = 17;
timer1.Enabled = true;
}
}
}
}以上就是“C#如何实现图形界面的时钟”这篇文章的所有内容，感谢各位的阅读！相信大家阅读完这篇文章都有很大的收获，小编每天都会为大家更新不同的知识，如果还想学习更多的知识，请关注亿速云行业资讯频道。
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