I am trying to set up two programs in C#. Basically, a simple client server set up where I want the server to listen for an image from the client. Then, upon receiving the image, will display it in a PictureBox.
I keep running into the following error:
A first chance exception of type 'System.ArgumentException' occurred in System.Drawing.dll
The error is happening on the server code that is listening at this line: Image bmp = Image.FromStream(ms); Any ideas?
The Server code that listens:
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;
using System.IO;
using System.Net;
using System.Net.Sockets;
namespace NetView
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
startListening();
}
private void startListening()
{
////////////////////////////////////////////
Console.WriteLine("Server is starting...");
byte[] data = new byte[1024];
IPEndPoint ipep = new IPEndPoint(IPAddress.Any, 9050);
Socket newsock = new Socket(AddressFamily.InterNetwork,
SocketType.Stream, ProtocolType.Tcp);
newsock.Bind(ipep);
newsock.Listen(10);
Console.WriteLine("Waiting for a client...");
Socket client = newsock.Accept();
IPEndPoint newclient = (IPEndPoint)client.RemoteEndPoint;
Console.WriteLine("Connected with {0} at port {1}",
newclient.Address, newclient.Port);
while (true)
{
data = ReceiveVarData(client);
MemoryStream ms = new MemoryStream(data);
try
{
Image bmp = Image.FromStream(ms);
pictureBox1.Image = bmp;
}
catch (ArgumentException e)
{
Console.WriteLine("something broke");
}
if (data.Length == 0)
newsock.Listen(10);
}
//Console.WriteLine("Disconnected from {0}", newclient.Address);
client.Close();
newsock.Close();
/////////////////////////////////////////////
}
private static byte[] ReceiveVarData(Socket s)
{
int total = 0;
int recv;
byte[] datasize = new byte[4];
recv = s.Receive(datasize, 0, 4, 0);
int size = BitConverter.ToInt32(datasize, 0);
int dataleft = size;
byte[] data = new byte[size];
while (total < size)
{
recv = s.Receive(data, total, dataleft, 0);
if (recv == 0)
{
break;
}
total += recv;
dataleft -= recv;
}
return data;
}
private void Form1_Load(object sender, EventArgs e)
{
}
}
}
The Client Code:
using System;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Drawing;
using System.IO;
namespace ConsoleApplication2
{
class Program
{
static void Main(string[] args)
{
byte[] data = new byte[1024];
int sent;
IPEndPoint ipep = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 9050);
Socket server = new Socket(AddressFamily.InterNetwork,
SocketType.Stream, ProtocolType.Tcp);
try
{
server.Connect(ipep);
}
catch (SocketException e)
{
Console.WriteLine("Unable to connect to server.");
Console.WriteLine(e.ToString());
Console.ReadLine();
}
Bitmap bmp = new Bitmap("c:\\eek256.jpg");
MemoryStream ms = new MemoryStream();
// Save to memory using the Jpeg format
bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
// read to end
byte[] bmpBytes = ms.GetBuffer();
bmp.Dispose();
ms.Close();
sent = SendVarData(server, bmpBytes);
Console.WriteLine("Disconnecting from server...");
server.Shutdown(SocketShutdown.Both);
server.Close();
Console.ReadLine();
}
private static int SendVarData(Socket s, byte[] data)
{
int total = 0;
int size = data.Length;
int dataleft = size;
int sent;
byte[] datasize = new byte[4];
datasize = BitConverter.GetBytes(size);
sent = s.Send(datasize);
while (total < size)
{
sent = s.Send(data, total, dataleft, SocketFlags.None);
total += sent;
dataleft -= sent;
}
return total;
}
}
}