using System; using System.Net; using System.Net.Sockets; using System.Text; public class BadBroadcast { public static void Main() { Socket sock = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp); IPEndPoint iep = new IPEndPoint(IPAddress.Broadcast, 9050); byte[] data = Encoding.ASCII.GetBytes("This is a test message"); sock.SendTo(data, iep); sock.Close(); } }
Author: coder
Receive Broadcast
/* C# Network Programming by Richard Blum Publisher: Sybex ISBN: 0782141765 */ using System; using System.Net; using System.Net.Sockets; using System.Text; public class RecvBroadcst { public static void Main() { Socket sock = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp); IPEndPoint iep = new IPEndPoint(IPAddress.Any, 9050); sock.Bind(iep); EndPoint ep = (EndPoint)iep; Console.WriteLine("Ready to receive..."); byte[] data = new byte[1024]; int recv = sock.ReceiveFrom(data, ref ep); string stringData = Encoding.ASCII.GetString(data, 0, recv); Console.WriteLine("received: {0} from: {1}", stringData, ep.ToString()); data = new byte[1024]; recv = sock.ReceiveFrom(data, ref ep); stringData = Encoding.ASCII.GetString(data, 0, recv); Console.WriteLine("received: {0} from: {1}", stringData, ep.ToString()); sock.Close(); } }
Create Metafile
using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Windows.Forms;
class CreateMetafile: Form
{
Metafile mf;
public static void Main()
{
Application.Run(new CreateMetafile());
}
public CreateMetafile()
{
ResizeRedraw = true;
Graphics grfx = CreateGraphics();
IntPtr ipHdc = grfx.GetHdc();
mf = new Metafile(“CreateMetafile.emf”, ipHdc);
grfx.ReleaseHdc(ipHdc);
grfx.Dispose();
grfx = Graphics.FromImage(mf);
grfx.FillEllipse(Brushes.Blue, 60, 20, 20, 20);
grfx.Dispose();
}
protected override void OnPaint(PaintEventArgs pea)
{
DoPage(pea.Graphics, ForeColor,ClientSize.Width, ClientSize.Height);
}
protected void DoPage(Graphics grfx, Color clr, int cx, int cy)
{
for (int y = 0; y < cy; y += mf.Height)
for (int x = 0; x < cx; x += mf.Width)
grfx.DrawImage(mf, x, y, mf.Width, mf.Height);
}
}
[/csharp]
Create Metafile (Reload)
using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Windows.Forms;
class CreateMetafileReload : Form {
const string strMetafile = “CreateMetafileReload.emf”;
public static void Main() {
Application.Run(new CreateMetafileReload());
}
public CreateMetafileReload() {
ResizeRedraw = true;
if (!File.Exists(strMetafile)) {
Graphics grfx = CreateGraphics();
IntPtr ipHdc = grfx.GetHdc();
Metafile mf = new Metafile(strMetafile, ipHdc);
grfx.ReleaseHdc(ipHdc);
grfx.Dispose();
grfx = Graphics.FromImage(mf);
grfx.DrawEllipse(Pens.Black, 0, 0, 100, 100);
grfx.FillEllipse(Brushes.Blue, 60, 20, 20, 20);
grfx.DrawArc(new Pen(Color.Red, 10), 20, 20, 60, 60, 30, 120);
grfx.Dispose();
}
}
protected override void OnPaint(PaintEventArgs pea) {
DoPage(pea.Graphics, ForeColor, ClientSize.Width, ClientSize.Height);
}
protected void DoPage(Graphics grfx, Color clr, int cx, int cy) {
Metafile mf = new Metafile(strMetafile);
for (int y = 0; y < cy; y += mf.Height) for (int x = 0; x < cx; x += mf.Width) grfx.DrawImage(mf, x, y, mf.Width, mf.Height); } } [/csharp]
Create Metafile (Memory)
using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Windows.Forms;
class CreateMetafileMemory: Form
{
MemoryStream ms = new MemoryStream();
public static void Main()
{
Application.Run(new CreateMetafileMemory());
}
public CreateMetafileMemory()
{
ResizeRedraw = true;
Graphics grfx = CreateGraphics();
IntPtr ipHdc = grfx.GetHdc();
Metafile mf = new Metafile(ms, ipHdc);
grfx.ReleaseHdc(ipHdc);
grfx.Dispose();
grfx = Graphics.FromImage(mf);
grfx.FillEllipse(Brushes.Gray, 0, 0, 100, 100);
grfx.DrawEllipse(Pens.Black, 0, 0, 100, 100);
grfx.DrawArc(new Pen(Color.Red, 10), 20, 20, 60, 60, 30, 120);
grfx.Dispose();
}
protected override void OnPaint(PaintEventArgs pea)
{
DoPage(pea.Graphics, ForeColor,ClientSize.Width, ClientSize.Height);
}
protected void DoPage(Graphics grfx, Color clr, int cx, int cy)
{
ms.Position = 0;
Metafile mf = new Metafile(ms);
for (int y = 0; y < cy; y += mf.Height) for (int x = 0; x < cx; x += mf.Width) grfx.DrawImage(mf, x, y, mf.Width, mf.Height); } } [/csharp]
Metafile Page Units
using System; using System.Drawing; using System.Drawing.Imaging; using System.Drawing.Printing; using System.Windows.Forms; class MetafilePageUnits: Form { Metafile mf; public static void Main() { Application.Run(new MetafilePageUnits()); } public MetafilePageUnits() { ResizeRedraw = true; Graphics grfx = CreateGraphics(); IntPtr ipHdc = grfx.GetHdc(); mf = new Metafile("MetafilePageUnits.emf", ipHdc); grfx.ReleaseHdc(ipHdc); grfx.Dispose(); grfx = Graphics.FromImage(mf); grfx.Clear(Color.White); grfx.PageUnit = GraphicsUnit.Pixel; Pen pen = new Pen(Color.Black, grfx.DpiX / 72); grfx.DrawRectangle(pen, 0, 0, grfx.DpiX, grfx.DpiY); grfx.PageUnit = GraphicsUnit.Inch; grfx.PageScale = 0.01f; pen = new Pen(Color.Black, 100f / 72); grfx.DrawRectangle(pen, 25, 25, 100, 100); grfx.Dispose(); } protected void OnPaint(PaintEventArgs pea) { grfx.DrawImage(mf, 0, 0); } }
Enumerate Metafile
using System; using System.Drawing; using System.Drawing.Imaging; using System.IO; using System.Runtime.InteropServices; using System.Windows.Forms; class EnumMetafile: Form { Metafile mf; Panel panel = new Panel(); public static void Main() { Application.Run(new EnumMetafile()); } public EnumMetafile() { Splitter splitter = new Splitter(); splitter.Parent = this; splitter.Dock = DockStyle.Left; // Right; panel.Parent = this; panel.Dock = DockStyle.Left; panel.Paint += new PaintEventHandler(PanelOnPaint); Menu = new MainMenu(); Menu.MenuItems.Add("&Open!", new EventHandler(MenuOpenOnClick)); } void MenuOpenOnClick(object obj, EventArgs ea) { OpenFileDialog dlg = new OpenFileDialog(); dlg.Filter = "All Metafiles|*.wmf;*.emf|" + "Windows Metafile (*.wmf)|*.wmf|" + "Enhanced Metafile (*.emf)|*.emf"; if (dlg.ShowDialog() == DialogResult.OK) { mf = new Metafile(dlg.FileName); panel.Invalidate(); Graphics grfx = CreateGraphics(); grfx.EnumerateMetafile(mf, new Point(0, 0), new Graphics.EnumerateMetafileProc(EnumMetafileProc)); grfx.Dispose(); } } bool EnumMetafileProc(EmfPlusRecordType eprt, int iFlags, int iDataSize, IntPtr ipData, PlayRecordCallback prc) { if (iDataSize > 0) { byte[] abyData = new Byte[iDataSize]; Marshal.Copy(ipData, abyData, 0, iDataSize); foreach (byte by in abyData) Console.WriteLine(" {0:X2}", by); } return true; } void PanelOnPaint(object obj, PaintEventArgs pea) { Panel panel = (Panel) obj; Graphics grfx = pea.Graphics; if (mf != null) grfx.DrawImage(mf, 0, 0); } }