C# 倒计时软件 示例源码

【实例截图】

【核心代码】

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 DayCount
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private float X;
        private float Y;

        DateTime timeD = Convert.ToDateTime("2017-10-18");

        private void Form1_Load(object sender, EventArgs e)
        {
            dateTimeExam.Value = Convert.ToDateTime("2017-10-18");
            dateTimeNow.Value = DateTime.Now;
            DateTime t1 = Convert.ToDateTime("2017-10-18");
            DateTime t2 = Convert.ToDateTime(DateTime.Now);
            TimeSpan ts = t1 - t2;
            labDays.Text = Convert.ToString(ts.Days)   "天";
            labHours.Text = Convert.ToString(ts.Hours)   "时";
            labMin.Text = Convert.ToString(ts.Minutes)   "分";
            labS.Text = Convert.ToString(ts.Seconds)   "秒";


            this.Resize  = new EventHandler(Form1_Resize);
            X = this.Width;
            Y = this.Height;
            setTag(this);
            Form1_Resize(new object(), new EventArgs());//x,y可在实例化时赋值,最后这句是新加的，在MDI时有用

            this.KeyPreview = true;
        }
// 
        private void timer1_Tick(object sender, EventArgs e)
        {
            dateTimeExam.Value = timeD;
            dateTimeNow.Value = DateTime.Now;
            DateTime t1 = timeD;
            DateTime t2 = Convert.ToDateTime(DateTime.Now);
            TimeSpan ts = t1 - t2;
            labDays.Text = Convert.ToString(ts.Days)   "天";
            labHours.Text = Convert.ToString(ts.Hours)   "时";
            labMin.Text = Convert.ToString(ts.Minutes)   "分";
            labS.Text = Convert.ToString(ts.Seconds)   "秒";
        }

        private void dateTimeExam_ValueChanged(object sender, EventArgs e)
        {
            timeD = dateTimeExam.Value;
        }
        private void setTag(Control cons)
        {
            foreach (Control con in cons.Controls)
            {
                con.Tag = con.Width   ":"   con.Height   ":"   con.Left   ":"   con.Top   ":"   con.Font.Size;
                if (con.Controls.Count > 0)
                    setTag(con);
            }
        }
        private void setControls(float newx, float newy, Control cons)
        {
            foreach (Control con in cons.Controls)
            {

                string[] mytag = con.Tag.ToString().Split(new char[] { ':' });
                float a = Convert.ToSingle(mytag[0]) * newx;
                con.Width = (int)a;
                a = Convert.ToSingle(mytag[1]) * newy;
                con.Height = (int)(a);
                a = Convert.ToSingle(mytag[2]) * newx;
                con.Left = (int)(a);
                a = Convert.ToSingle(mytag[3]) * newy;
                con.Top = (int)(a);
                Single currentSize = Convert.ToSingle(mytag[4]) * Math.Min(newx, newy);
                con.Font = new Font(con.Font.Name, currentSize, con.Font.Style, con.Font.Unit);
                if (con.Controls.Count > 0)
                {
                    setControls(newx, newy, con);
                }
            }

        }
        void Form1_Resize(object sender, EventArgs e)
        {
            float newx = (this.Width) / X;
            float newy = this.Height / Y;
            setControls(newx, newy, this);
            this.Text = this.Width.ToString()   " "   this.Height.ToString();

            //窗体最大化时 会全屏 及遮盖任务栏

            if (this.WindowState == FormWindowState.Maximized)
            {     
                this.FormBorderStyle = FormBorderStyle.None;
                this.WindowState = FormWindowState.Maximized;
            }
        }

        //注意，不要只copy KeyPress过程进去你的代码，要关联上事件
        private void Form1_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (e.KeyChar == (char)Keys.Escape)
            {
                this.WindowState = FormWindowState.Normal;
                this.FormBorderStyle = FormBorderStyle.FixedDialog;
            }
        }
    }
}