[c#] domainUpdown 활용으로 CountDown



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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Threading;
 
namespace WindowsFormsApplication4
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
 
            setDomainUpDown();
        }
 
        /// <summary>
        /// DomainUpDown Item을 Setting 한다
        /// </summary>
        public void setDomainUpDown()
        {
            //0~10
            for (int i = 10; i >= 0; i--)
            {
                domainUpDown1.Items.Add(i.ToString());
            }
            
            //init index
            domainUpDown1.SelectedIndex = 0;
        }
 
        /// <summary>
        /// label text를 업데이트 한다
        /// </summary>
        /// <param name="iNumber"></param>
        public void ChangeLabel(int iNumber)
        {
            label1.Text = iNumber.ToString();
        }
 
        //invoke처리를 위해 대리자를 선언한다
        public delegate void myDelegate(int a);
 
        public void Runing(object iNum)
        {
            //초기 input값
            string strStart = iNum.ToString();
            
            //대리자를 통해 라벨을 변경하도록 한다
            myDelegate d = new myDelegate(ChangeLabel);
 
            //초기 값으로부터 카운트 다운한다
            for (int i = int.Parse(strStart); i >= 0; i--)
            {
                if (label1.InvokeRequired)
                {
                    label1.Invoke(d, i);
                }
                else
                {
                    ChangeLabel(i);
                }
 
                Thread.Sleep(1000);
            }    
        }
 
        private void button1_Click(object sender, EventArgs e)
        {
            //파라메터가 있는 thread를 돌리기 위해, ParameterizedThreadStart 객체를 만든다.
            ParameterizedThreadStart pt = new ParameterizedThreadStart(Runing);
 
            //thread에 처리해준다
            Thread thread = new Thread(pt);
 
            //thread를 시작할때, 파라메터값을 넣어준다
            thread.Start(domainUpDown1.SelectedItem.ToString());
        }
 
    }
}
 
cs

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