一个C#写的CLOCK程序

窗体设计代码：[Form1.Designer.cs]

 

namespace Game_One
...{
    partial class Form1
    ...{
        /**//// <summary>
        /// 必需的设计器变量。
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /**//// <summary>
        /// 清理所有正在使用的资源。
        /// </summary>
        /// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>
        protected override void Dispose(bool disposing)
        ...{
            if (disposing && (components != null))
            ...{
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        Windows 窗体设计器生成的代码#region Windows 窗体设计器生成的代码

        /**//// <summary>
        /// 设计器支持所需的方法 - 不要
        /// 使用代码编辑器修改此方法的内容。
        /// </summary>
        private void InitializeComponent()
        ...{
            System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(Form1));
            this.ClockPanel = new System.Windows.Forms.Panel();
            this.PicBox = new System.Windows.Forms.PictureBox();
            this.label1 = new System.Windows.Forms.Label();
            this.label2 = new System.Windows.Forms.Label();
            this.TimeBox = new System.Windows.Forms.TextBox();
            this.CheckBtn = new System.Windows.Forms.Button();
            this.AnswerBtn = new System.Windows.Forms.Button();
            this.NameLabel = new System.Windows.Forms.Label();
            ((System.ComponentModel.ISupportInitialize)(this.PicBox)).BeginInit();
            this.SuspendLayout();
            // 
            // ClockPanel
            // 
            this.ClockPanel.BackColor = System.Drawing.Color.Transparent;
            this.ClockPanel.ForeColor = System.Drawing.Color.Transparent;
            this.ClockPanel.Location = new System.Drawing.Point(12, 95);
            this.ClockPanel.Name = "ClockPanel";
            this.ClockPanel.Size = new System.Drawing.Size(498, 498);
            this.ClockPanel.TabIndex = 0;
            // 
            // PicBox
            // 
            this.PicBox.BackColor = System.Drawing.Color.Transparent;
            this.PicBox.Location = new System.Drawing.Point(516, 95);
            this.PicBox.Name = "PicBox";
            this.PicBox.Size = new System.Drawing.Size(488, 498);
            this.PicBox.SizeMode = System.Windows.Forms.PictureBoxSizeMode.Zoom;
            this.PicBox.TabIndex = 1;
            this.PicBox.TabStop = false;
            // 
            // label1
            // 
            this.label1.AutoSize = true;
            this.label1.BackColor = System.Drawing.Color.Transparent;
            this.label1.Font = new System.Drawing.Font("隶书", 36F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));
            this.label1.ForeColor = System.Drawing.Color.Transparent;
            this.label1.Location = new System.Drawing.Point(327, 9);
            this.label1.Name = "label1";
            this.label1.Size = new System.Drawing.Size(404, 48);
            this.label1.TabIndex = 2;
            this.label1.Text = "你能认出他们吗？";
            // 
            // label2
            // 
            this.label2.AutoSize = true;
            this.label2.BackColor = System.Drawing.Color.Transparent;
            this.label2.Font = new System.Drawing.Font("新宋体", 20.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));
            this.label2.ForeColor = System.Drawing.Color.Transparent;
            this.label2.Location = new System.Drawing.Point(140, 647);
            this.label2.Name = "label2";
            this.label2.Size = new System.Drawing.Size(194, 27);
            this.label2.TabIndex = 3;
            this.label2.Text = "他/她的时间：";
            // 
            // TimeBox
            // 
            this.TimeBox.Font = new System.Drawing.Font("宋体", 12F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));
            this.TimeBox.Location = new System.Drawing.Point(317, 647);
            this.TimeBox.Name = "TimeBox";
            this.TimeBox.Size = new System.Drawing.Size(123, 26);
            this.TimeBox.TabIndex = 1;
            this.TimeBox.TextChanged += new System.EventHandler(this.TimeBox_TextChanged);
            // 
            // CheckBtn
            // 
            this.CheckBtn.Font = new System.Drawing.Font("宋体", 14F);
            this.CheckBtn.Location = new System.Drawing.Point(466, 648);
            this.CheckBtn.Name = "CheckBtn";
            this.CheckBtn.Size = new System.Drawing.Size(96, 27);
            this.CheckBtn.TabIndex = 2;
            this.CheckBtn.Text = "确　定";
            this.CheckBtn.UseVisualStyleBackColor = true;
            this.CheckBtn.Click += new System.EventHandler(this.CheckBtn_Click);
            // 
            // AnswerBtn
            // 
            this.AnswerBtn.Font = new System.Drawing.Font("宋体", 14F);
            this.AnswerBtn.Location = new System.Drawing.Point(587, 648);
            this.AnswerBtn.Name = "AnswerBtn";
            this.AnswerBtn.Size = new System.Drawing.Size(96, 27);
            this.AnswerBtn.TabIndex = 3;
            this.AnswerBtn.Text = "答　案";
            this.AnswerBtn.UseVisualStyleBackColor = true;
            this.AnswerBtn.Click += new System.EventHandler(this.AnswerBtn_Click);
            // 
            // NameLabel
            // 
            this.NameLabel.AutoSize = true;
            this.NameLabel.BackColor = System.Drawing.Color.Transparent;
            this.NameLabel.Font = new System.Drawing.Font("新宋体", 20.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));
            this.NameLabel.ForeColor = System.Drawing.Color.Transparent;
            this.NameLabel.Location = new System.Drawing.Point(746, 645);
            this.NameLabel.Name = "NameLabel";
            this.NameLabel.Size = new System.Drawing.Size(124, 27);
            this.NameLabel.TabIndex = 4;
            this.NameLabel.Text = "姓名答案";
            this.NameLabel.Visible = false;
            // 
            // Form1
            // 
            this.AcceptButton = this.CheckBtn;
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.BackgroundImage = ((System.Drawing.Image)(resources.GetObject("$this.BackgroundImage")));
            this.ClientSize = new System.Drawing.Size(1016, 734);
            this.Controls.Add(this.NameLabel);
            this.Controls.Add(this.AnswerBtn);
            this.Controls.Add(this.CheckBtn);
            this.Controls.Add(this.TimeBox);
            this.Controls.Add(this.label2);
            this.Controls.Add(this.label1);
            this.Controls.Add(this.PicBox);
            this.Controls.Add(this.ClockPanel);
            this.Name = "Form1";
            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
            this.Text = "热线（北京）通信技术有限公司";
            this.Paint += new System.Windows.Forms.PaintEventHandler(this.Form1_Paint);
            ((System.ComponentModel.ISupportInitialize)(this.PicBox)).EndInit();
            this.ResumeLayout(false);
            this.PerformLayout();

        }

        #endregion

        private System.Windows.Forms.Panel ClockPanel;
        private System.Windows.Forms.PictureBox PicBox;
        private System.Windows.Forms.Label label1;
        private System.Windows.Forms.Label label2;
        private System.Windows.Forms.TextBox TimeBox;
        private System.Windows.Forms.Button CheckBtn;
        private System.Windows.Forms.Button AnswerBtn;
        private System.Windows.Forms.Label NameLabel;
    }
}

程序资源文件就不贴了，就是一张图片

程序实现代码：[Form1.cs]

 

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Configuration;

namespace Game_One
...{
    public partial class Form1 : Form
    ...{
        private DateTime DT = new DateTime();
        private Image ImgBak = Image.FromFile(ConfigurationManager.AppSettings["BackGroundImage"].ToString());
        System.IO.MemoryStream MEM = new System.IO.MemoryStream();
        bool Saved = false;

        public Form1()
        ...{
            InitializeComponent();
            this.SetStyle(ControlStyles.UserPaint, true);
            this.SetStyle(ControlStyles.OptimizedDoubleBuffer, true);
            this.SetStyle(ControlStyles.AllPaintingInWmPaint, true);
            if (!Saved)
            ...{
                ImgBak.Save(MEM, System.Drawing.Imaging.ImageFormat.Jpeg);
                Saved = true;
            }
            TimeBox.Focus();
            PicBox.Visible = false;            
        }
        
        private void AnswerBtn_Click(object sender, EventArgs e)
        ...{
            NameLabel.Text = ConfigurationManager.AppSettings[PicIndex.ToString()].ToString();
            NameLabel.Visible = true;
        }

        private void DrawClock(Graphics g, Rectangle Rect)
        ...{            
            //g.Clear(Color.Empty);
            Point L = ClockPanel.Location;
            Point A_1 = new Point(0-L.X, 0-L.Y);
            Point A_2 = new Point(A_1.X + ClockPanel.Width, A_1.Y);
            Point A_3 = new Point(A_1.X, A_1.Y + ClockPanel.Height);
            Point[] A = new Point[] ...{ A_1, A_2, A_3 };
            Point B_1 = new Point(0, 0);
            Point B_2 = new Point(ClockPanel.Width, 0);
            Point B_3 = new Point(0, ClockPanel.Height);
            Point[] B = new Point[] ...{B_1,B_2,B_3 };
            Rectangle NewRect = new Rectangle(L.X, L.Y, ClockPanel.Width, ClockPanel.Height);
            g.DrawImage(ImgBak, B, NewRect, GraphicsUnit.Pixel);
            //绘制圆周
            Pen RedPen = new Pen(Color.Red, 3);
            g.DrawEllipse(RedPen, 7, 7, 480, 480);

            Point Center = new Point(247, 247);

            //绘制钟点
            Pen PPen_Ora = new Pen(Color.Blue, 4);
            Pen PPen_Special = new Pen(Color.Red, 5);
            int SidePoint_X;
            int SidePoint_Y;

            int MovePoint_X;
            int MovePoint_Y;

            for (int i = 1; i <= 60; i++)
            ...{
                SidePoint_X = 247 + (int)(Math.Sin(Math.PI / 180 * i * 6) * 240);
                SidePoint_Y = 247 + (int)(Math.Cos(Math.PI / 180 * i * 6) * 240);
                if (i % 5 == 0)
                ...{
                    MovePoint_X = 247 + (int)(Math.Sin(Math.PI / 180 * i * 6) * 220);
                    MovePoint_Y = 247 + (int)(Math.Cos(Math.PI / 180 * i * 6) * 220);
                    Point MovePoint = new Point(MovePoint_X, MovePoint_Y);
                    Point SidePoint = new Point(SidePoint_X, SidePoint_Y);
                    g.DrawLine(PPen_Special, MovePoint, SidePoint);
                }
                else
                ...{
                    MovePoint_X = 247 + (int)(Math.Sin(Math.PI / 180 * i * 6) * 235);
                    MovePoint_Y = 247 + (int)(Math.Cos(Math.PI / 180 * i * 6) * 235);
                    Point MovePoint = new Point(MovePoint_X, MovePoint_Y);
                    Point SidePoint = new Point(SidePoint_X, SidePoint_Y);
                    g.DrawLine(PPen_Ora, MovePoint, SidePoint);
                }
            }
            int HourPoint = DT.Hour;
            int MinutePoint = DT.Minute;

            //三角形顶点
            int HourEnd_X = 247 + (int)(Math.Sin(Math.PI / 180 * (HourPoint * 30 + MinutePoint * 0.5)) * 180);
            int HourEnd_Y = 247 - (int)(Math.Cos(Math.PI / 180 * (HourPoint * 30 + MinutePoint * 0.5)) * 180);
            Point hourEnd = new Point(HourEnd_X, HourEnd_Y);

            //三角形右节点
            int HourRight_X = 247 + (int)(Math.Sin(Math.PI / 180 * (90 + HourPoint * 30 + MinutePoint * 0.5)) * 12);
            int HourRight_Y = 247 - (int)(Math.Cos(Math.PI / 180 * (90 + HourPoint * 30 + MinutePoint * 0.5)) * 12);
            Point RightSide = new Point(HourRight_X, HourRight_Y);
            //三角形左节点
            int HourLeft_X = 247 + (int)(Math.Sin(Math.PI / 180 * (270 + HourPoint * 30 + MinutePoint * 0.5)) * 12);
            int HourLeft_Y = 247 - (int)(Math.Cos(Math.PI / 180 * (270 + HourPoint * 30 + MinutePoint * 0.5)) * 12);
            Point LeftSide = new Point(HourLeft_X, HourLeft_Y);
            //用画刷填充区域
            SolidBrush HourBrush = new SolidBrush(Color.Gray);
            Point[] HourA = new Point[] ...{ RightSide, LeftSide, hourEnd };
            g.FillPolygon(HourBrush, HourA);
            //箭头中节点
            int HHeadMiddle_X = 247 + (int)(Math.Sin(Math.PI / 180 * (HourPoint * 30 + MinutePoint * 0.5)) * 135);
            int HHeadMiddle_Y = 247 - (int)(Math.Cos(Math.PI / 180 * (HourPoint * 30 + MinutePoint * 0.5)) * 135);
            Point HHeadMiddle = new Point(HHeadMiddle_X, HHeadMiddle_Y);
            //箭头左节点
            int HHeadLeft_X = 247 + (int)(Math.Sin(Math.PI / 180 * (HourPoint * 30 + MinutePoint * 0.5 - 2)) * 150);
            int HHeadLeft_Y = 247 - (int)(Math.Cos(Math.PI / 180 * (HourPoint * 30 + MinutePoint * 0.5 - 2)) * 150);
            Point HHeadLeft = new Point(HHeadLeft_X, HHeadLeft_Y);
            //箭头右节点
            int HHeadRight_X = 247 + (int)(Math.Sin(Math.PI / 180 * (HourPoint * 30 + MinutePoint * 0.5 + 2)) * 150);
            int HHeadRight_Y = 247 - (int)(Math.Cos(Math.PI / 180 * (HourPoint * 30 + MinutePoint * 0.5 + 2)) * 150);
            Point HHeadRight = new Point(HHeadRight_X, HHeadRight_Y);
            Point[] HourHead = new Point[] ...{ HHeadLeft, HHeadMiddle, HHeadRight, hourEnd, };
            g.FillPolygon(HourBrush, HourHead);
            //绘制分针
            int MinuteEnd_X = 247 + (int)(Math.Sin(Math.PI / 180 * MinutePoint * 6) * 230);
            int MinuteEnd_Y = 247 - (int)(Math.Cos(Math.PI / 180 * MinutePoint * 6) * 230);
            Point MinuteEnd = new Point(MinuteEnd_X, MinuteEnd_Y);
            //三角形右节点
            int MinuteRight_X = 247 + (int)(Math.Sin(Math.PI / 180 * (90 + MinutePoint * 6)) * 9);
            int MinuteRight_Y = 247 - (int)(Math.Cos(Math.PI / 180 * (90 + MinutePoint * 6)) * 9);
            Point MinuteRightSide = new Point(MinuteRight_X, MinuteRight_Y);
            //三角形左节点
            int MinuteLeft_X = 247 + (int)(Math.Sin(Math.PI / 180 * (270 + MinutePoint * 6)) * 9);
            int MinuteLeft_Y = 247 - (int)(Math.Cos(Math.PI / 180 * (270 + MinutePoint * 6)) * 9);
            Point MinuteLeftSide = new Point(MinuteLeft_X, MinuteLeft_Y);
            //用画刷填充区域
            SolidBrush MinuteBrush = new SolidBrush(Color.Green);
            Point[] MinuteA = new Point[] ...{ MinuteRightSide, MinuteLeftSide, MinuteEnd };
            g.FillPolygon(MinuteBrush, MinuteA);
            //箭头左节点
            int MHeadLeft_X = 247 + (int)(Math.Sin(Math.PI / 180 * (MinutePoint * 6 - 2)) * 190);
            int MHeadLeft_Y = 247 - (int)(Math.Cos(Math.PI / 180 * (MinutePoint * 6 - 2)) * 190);
            Point MHeadLeft = new Point(MHeadLeft_X, MHeadLeft_Y);
            //箭头右节点
            int MHeadRight_X = 247 + (int)(Math.Sin(Math.PI / 180 * (MinutePoint * 6 + 2)) * 190);
            int MHeadRight_Y = 247 - (int)(Math.Cos(Math.PI / 180 * (MinutePoint * 6 + 2)) * 190);
            Point MHeadRight = new Point(MHeadRight_X, MHeadRight_Y);
            //箭头中节点
            int MHeadMiddle_X = 247 + (int)(Math.Sin(Math.PI / 180 * (MinutePoint * 6)) * 180);
            int MHeadMiddle_Y = 247 - (int)(Math.Cos(Math.PI / 180 * (MinutePoint * 6)) * 180);
            Point MHeadMiddle = new Point(MHeadMiddle_X, MHeadMiddle_Y);
            Point[] MinuteHead = new Point[] ...{ MHeadLeft, MHeadMiddle, MHeadRight, MinuteEnd };
            g.FillPolygon(MinuteBrush, MinuteHead);

            //绘制轴心
            Pen CPen = new Pen(Color.Red, 14);
            g.DrawEllipse(CPen, 240, 240, 14, 14);
        }

        private void Form1_Paint(object sender, PaintEventArgs e)
        ...{
            paintClock(this.ClientRectangle);
        }

        private static int PicIndex = 0;

        private void CheckBtn_Click(object sender, EventArgs e)
        ...{
            try
            ...{
                DT = Convert.ToDateTime(TimeBox.Text.Trim() + ":00");
                this.OnPaint(new PaintEventArgs(this.CreateGraphics(),this.ClientRectangle));

                if (DT.Hour >= 12)
                ...{
                    PicIndex = (DT.Hour - 12) * 3 + DT.Minute / 20 + 1;
                }
                else
                ...{
                    PicIndex = DT.Hour * 3 + DT.Minute / 20 + 1;
                }
                PicBox.ImageLocation = ConfigurationManager.AppSettings["ManPic"].ToString() + PicIndex.ToString() + ".jpg";
                PicBox.Visible = true;
                PicBox.Show();
            }
            catch
            ...{
            }
        }

        internal void paintClock(Rectangle rect)
        ...{
            if (!this.IsDisposed && this.Visible)
            ...{
                BufferedGraphicsContext myContext = BufferedGraphicsManager.Current;
                
                BufferedGraphics buffer = myContext.Allocate(ClockPanel.CreateGraphics(), rect);
                if (buffer.Graphics != null)
                ...{
                    buffer.Graphics.Clear(this.BackColor);
                    this.DrawClock(buffer.Graphics, this.ClientRectangle);
                }
                buffer.Render();
                buffer.Dispose();
            }
        }

        private void TimeBox_TextChanged(object sender, EventArgs e)
        ...{
            NameLabel.Visible = false;
            PicBox.ImageLocation = "";
            PicBox.Visible = false;
        }
    }
}

主要实现思路：程序每刷新一次，就重新绘制一次表盘，同时显示时间对应的图片（图片预设36张）

绘制表盘的时候，Panel的背景需要被Cache 一次，

然后再在Panel上重新绘制，这样可以避免重新绘制整个

Form的背景带来的消耗