Hello World

using System.Net; using System.Net.Sockets; public string GetLocalIP() { IPHostEntry host = Dns.GetHostEntry(Dns.GetHostName()); string localIP = ""; foreach (IPAddress ip in host.AddressList) { if (ip.AddressFamily == AddressFamily.InterNetwork) { localIP = ip.ToString(); } } return localIP; } IP 주소가 설정되어있지 않을 경우 127.0.0.1으로 반환

private void CreateSegment(Control ctl, int number) { Graphics g = ctl.CreateGraphics(); Pen p = new Pen(Color.Orange, 10); Point po1 = new Point(10, 10); Point po2 = new Point(10, 50); Point po3 = new Point(10, 90); Point po4 = new Point(60, 10); Point po5 = new Point(60, 50); Point po6 = new Point(60, 90); g.Clear(Color.Black); if (number == 0) { g.DrawLine(p, po1, po2); g.D..

using System.Net; string strIP = ((IPEndPoint)socket.RemoteEndPoint).Address.ToString(); //원격 접속 서버 IP string strPORT = ((IPEndPoint)socket.RemoteEndPoint).Port.ToString(); //원격 접속 서버PORT //위 코드에서의 socket 명칭은 소켓클래스의 객체입니다.

using System.Reflection; namespace FormApplication { public class Form { Type t = typeof(FormApplication.UserClass); MemberInfo[] member = t.FindMembers(MemberTypes.Field, BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Static, null, null); foreach(MemberInfo m in member) { MessageBox.Show(m.Name); //출력 결과 => sUserName, dt 이름 출력 } } public class ..

public interface IService { void DataService(string data); } public class DataClass : IService { public void DataService(string data) { MessageBox.Show(data); } } public class Manager { public static object InitInstance(string sAssemblyName, string sClassName) { Type type = Type.GetType(sAssemblyName + "." + sClassName); object obj = Activator.CreateInstance(type); return obj;..

using System.Collections; Hashtable ht = new Hashtable(); private void Form1_Load(object sender, EventArgs e) { Form2 frm2 = new Form2(); Form3 frm3 = new Form3(); HashTableAddForm("Form2", frm2); HashTableAddForm("Form3", frm3); } private void button1_Click(object sender, EventArgs e) { HashTableShowForm("Form2"); } private void HashTableAddForm(string sKey, Form form) { if (..

using System.Runtime.InteropServices; [DllImport("user32.dll")] static extern void mouse_event(int dwFlags, int dx, int dy, int cButtons, int dwExtraInfo); const int MOUSEEVENTF_LEFTDOWN = 0x0002; const int MOUSEEVENTF_LEFTUP = 0x0004; private void button1_Click(object sender, EventArgs e) { Cursor.Position = new Point(this.Location.X + 20, this.Location.Y + 10); mouse_event(M..

using System.Runtime.InteropServices; [DllImport("user32.dll")] static extern bool PrintWindow(IntPtr hwnd, IntPtr hDC, uint nFlags); private void button1_Click(object sender, EventArgs e) { Graphics g = this.CreateGraphics(); Bitmap bmp = new Bitmap(this.Width, this.Height, g); Graphics imgGraphics = Graphics.FromImage(bmp); IntPtr dc = imgGraphics.GetHdc(); bool success = Pr..

using System.Runtime.InteropServices; [DllImport("user32.dll")] static extern void keybd_event(byte bVK, byte bScan, int dwFlags, int dwExtraInfo); const int KEYEVENTF_KEYUP = 0x02; private void button1_Click(object sender, EventArgs e) { textBox1.Focus(); keybd_event((byte)Keys.D0, 0, 0, 0); keybd_event((byte)Keys.D0, 0, KEYEVENTF_KEYUP, 0); } //위 코드를 테스트 해보..

double nTotalSeconds = 90; DateTime dt; private void Form_Load(object sender, EventArgs e) { dt = new DateTime(); timer1.Interval = 1000; timer1.Enabled = true; } private void timer1_Tick(object sender, EventArgs e) { nTotalSeconds--; textBox1.Text = dt.AddSeconds(nTotalSeconds).ToString("HH:mm:ss"); if(nTotalSeconds == 0) timer1.Enabled = false; } 출력 00:01:30 00:01:29 00:..