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Ahsan98 wrote: using a loop can be the simplest and best(in my opinion)way to implement a given number of thread
Loops and threads are two different concepts; they're not exchangeable.
A thread runs asynchronous to the code of the application-thread. It does not block processing.
A loop is a (blocking) repetition of a piece of code.
Bastard Programmer from Hell 
If you can't read my code, try converting it here[^]
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 Thanks for injecting some protein into the pabulum being served 
... edit ... I should have mentioned that what led me to Lippert's posts was this thread on StackOverFlow where multi-threading and looping is discussed:[^].
You might find Eric Lippert's warnings about the "breaking change" in C#5.0 in terms of 'foreach loop behavior interesting: [^], [^].
yours, Bill
~
“This isn't right; this isn't even wrong." Wolfgang Pauli, commenting on a physics paper submitted for a journal
modified 20-Aug-13 23:39pm.
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Hey.
I made a website and a windows application which use one database. windows application duty is to register,editing,reporting data to database and website is just a static web application to show data!
well i need some council to decide how i share database between them!
Is better to keep database on a host and windows app connect it with IP server adress in connectionstring? or i should use webservie?
Which one is more safe?
Which one is more flexible?
Is there another way?
What if internet connection lost and windowss app is trying to register some data?(some data will be lost)
I decide to store data into a local database and a timer will update main database on the host every 10 minutes!Is it good? Is there better way? 
(C#, ASP.NET,SQLSERVER)
thank you !
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source.compiler wrote: Which one is more safe?
The webservice might be better in identifying brute-force attempts.
source.compiler wrote: Which one is more flexible?
A webservice, since it's custom code.
source.compiler wrote: Is there another way?
Write your own server and protocol. Doesn't offer much additional benefits though.
source.compiler wrote: What if internet connection lost and windowss app is trying to register some data?(some data will be lost)
It could be, depends on what you do with it.
source.compiler wrote: I decide to store data into a local database and a timer will update main database on the host every 10 minutes!Is it good? Is there better way?
Ditch the timer. Simply write everything to the remote PC and a local copy/cache, and do a "merge" as soon as the user is online again.
Bastard Programmer from Hell
If you can't read my code, try converting it here[^]
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Eddy Vluggen wrote: Ditch the timer. Simply write everything to the remote PC and a local copy/cache, and do a "merge" as soon as the user is online again.
If i store a copy of updated database into a dataset,then does not it use memory much?or it needs to have a local database on hard?
Thank you!
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Web-service approach will be more safe, and flexible; so, I don't think you should think about any other option when there are web-services.
That is good thing that you are keeping such issues (like internet connection lost) in mind while working on your application.
A better way could be to do a proper exception handling while connecting to the web-service as well as while calling methods of the web-service. If you are not connected, or some of the method has not returned the expected results this means something wrong happened. In that case you should keep backup of that record only and try re-inserting that record into the database laters. This entirely depends upon how much critical is that data for you with respect to usage point of view. You can try it re-inserting every 10 minutes of may be once in a day. But don't forget to remove the backup of that record once it is inserted into live database (For backup, you can use the same copy of database locally)
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Hi,
How can I implement rdlc report designer inside my application, the user could design their reports as the need and finally to save them as rdlc file format.
Best regards.
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I'm new to C# and have been reading up on Classes. In my small app, I want to instantiate a class called 'backupJob'. There are two operationType members: local to remote server and syncing both ways. I want to create an object for one op type and then create another object for the other type.
In the demos I have seen they always show this:
Car myCar1 = new Car();
Car myCar2 = new Car();
I may end up with more than two backup jobs so I'm thinking there must be a better way to manage the object names besides myCar1 and myCar2, etc. I will want to delete an object as well as create more objects so is it best to keep track of these objects in an Array or possibly a Collection?
Thanks...
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Create and maintain objects in a collection (list maybe). You can add and remove objects as required from within the list.
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As Abhinav suggests, a collection is the easiest way to go: declare it as class level as a private List and you can do what you want with it:
private List<Car> myCars = new List<Car>();
...
Car car = new Car();
car.Color = blue;
car.Fuel = Fuels.Diesel;
myCars.Add(car);
...
myCars.Remove(car);
...
foreach (Car car in myCars)
{
car.Respray(Color.Red);
}
This message is manufactured from fully recyclable noughts and ones. To recycle this message, please separate into two tidy piles, and take them to your nearest local recycling centre.
Please note that in some areas noughts are always replaced with zeros by law, and many facilities cannot recycle zeroes - in this case, please bury them in your back garden and water frequently.
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Thanks for the help...!!!
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You're welcome!
This message is manufactured from fully recyclable noughts and ones. To recycle this message, please separate into two tidy piles, and take them to your nearest local recycling centre.
Please note that in some areas noughts are always replaced with zeros by law, and many facilities cannot recycle zeroes - in this case, please bury them in your back garden and water frequently.
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How to set a textbox on a website automatically which is inside an iframe or a frame?
I need the C# code for a simple text box
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How can I add (include) c libraries that is not available in windows or in my project?
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Sorry for the not so descriptive or apt title but I have been trying to do this for a while now but to no effect and its getting to me. I have a chat server(console application) and a chat client (winform application) and a separate winform application which only has a button on it. Whenever there is any new message and if the client window is minimized then i want that the button on that separate winform turns red. Once the client window gets restored or maximized then it should turn back to yellow which is also the original color of the button. I am able to achieve the change of color when a message is received but not taking into consideration the minimized state etc. If i try to do that using IsIconic nothing happens. What i have done is that get a handle of the client winform in the server application and checking if it is Iconic or not. Please guide as i am stuck on this for a while. The code is as follows:
The Server Application:
using System;
using System.Threading;
using System.Net.Sockets;
using System.Text;
using System.Collections;
using System.Net;
using System.Runtime.InteropServices;
using System.Drawing;
using System.Diagnostics;
namespace ConsoleApplication1
{
class Program
{
public static Hashtable clientsList = new Hashtable();
public static void Main()
{
string mutex_id = "MY_APP";
using (Mutex mutex = new Mutex(false, mutex_id))
{
if (!mutex.WaitOne(0, false))
{
return;
}
var loaclAddress = IPAddress.Parse("127.0.0.1");
var serverSocket = new TcpListener(loaclAddress, 81);
/*
TcpListener serverSocket = new TcpListener(8888);
*/
TcpClient clientSocket = default(TcpClient);
int counter = 0;
serverSocket.Start();
Console.WriteLine("Chat Server Started ....");
counter = 0;
while ((true))
{
counter += 1;
clientSocket = serverSocket.AcceptTcpClient();
byte[] bytesFrom = new byte[10025];
string dataFromClient = null;
NetworkStream networkStream = clientSocket.GetStream();
networkStream.Read(bytesFrom, 0, (int)clientSocket.ReceiveBufferSize);
dataFromClient = System.Text.Encoding.ASCII.GetString(bytesFrom);
dataFromClient = dataFromClient.Substring(0, dataFromClient.IndexOf("$"));
clientsList.Add(dataFromClient, clientSocket);
broadcast(dataFromClient + " Joined ", dataFromClient, false);
Console.WriteLine(dataFromClient + " Joined chat room ");
handleClinet client = new handleClinet();
client.startClient(clientSocket, dataFromClient, clientsList);
}
clientSocket.Close();
serverSocket.Stop();
Console.WriteLine("exit");
Console.ReadLine();
}
}
public static void broadcast(string msg, string uName, bool flag)
{
foreach (DictionaryEntry Item in clientsList)
{
TcpClient broadcastSocket;
broadcastSocket = (TcpClient)Item.Value;
NetworkStream broadcastStream = broadcastSocket.GetStream();
Byte[] broadcastBytes = null;
if (flag == true)
{
broadcastBytes = Encoding.ASCII.GetBytes(uName + " says : " + msg);
}
else
{
broadcastBytes = Encoding.ASCII.GetBytes(msg);
}
broadcastStream.Write(broadcastBytes, 0, broadcastBytes.Length);
broadcastStream.Flush();
}
} //end broadcast function
}//end Main class
public class handleClinet
{
//This is used to send custom message to your Winforms
[DllImport("user32")]
private static extern int SendMessage(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam);
//This is used to find your winforms window
[DllImport("user32", CharSet = CharSet.Auto)]
private static extern IntPtr FindWindow(string className, string windowName);
//This is used to register custom message so that it's ensured to be unique
[DllImport("user32")]
private static extern int RegisterWindowMessage(string msgName);
[DllImport("user32.dll")]
[return: MarshalAs(UnmanagedType.Bool)]
static extern bool IsIconic(IntPtr hWnd);
TcpClient clientSocket;
string clNo;
Hashtable clientsList;
public void startClient(TcpClient inClientSocket, string clineNo, Hashtable cList)
{
this.clientSocket = inClientSocket;
this.clNo = clineNo;
this.clientsList = cList;
Thread ctThread = new Thread(doChat);
ctThread.Start();
}
private void doChat()
{
int requestCount = 0;
byte[] bytesFrom = new byte[10025];
string dataFromClient = null;
Byte[] sendBytes = null;
string serverResponse = null;
string rCount = null;
requestCount = 0;
while ((true))
{
try
{
requestCount = requestCount + 1;
NetworkStream networkStream = clientSocket.GetStream();
networkStream.Read(bytesFrom, 0, (int)clientSocket.ReceiveBufferSize);
dataFromClient = System.Text.Encoding.ASCII.GetString(bytesFrom);
dataFromClient = dataFromClient.Substring(0, dataFromClient.IndexOf("$"));
Console.WriteLine("From client - " + clNo + " : " + dataFromClient);
int msg = 0;
IntPtr hwnd = IntPtr.Zero;
int red = RegisterColorCode(Color.Red);
//Console.WriteLine(red);
int yellow = RegisterColorCode(Color.Yellow);
//Console.WriteLine(yellow);
msg = 49806;
if (hwnd == IntPtr.Zero)
hwnd = FindWindow(null, "Winforms Application");
IntPtr hwnd1 = FindWindow(null, "ClientApp");
if (IsIconic(hwnd1)) //this if-else seems to have no effect as no color changes in the button on the winform
{
if (hwnd != IntPtr.Zero)
SetBackColor(hwnd, msg);
}
else
{
msg = 50054;
SetBackColor(hwnd, msg);
}
//SetBackColor(hwnd, msg);
//If i write only this then color changes but not on minized state its changed once and for all...
//what i want is for the previous if else condition to work**
hwnd1 = IntPtr.Zero;
rCount = Convert.ToString(requestCount);
Program.broadcast(dataFromClient, clNo, true);
hwnd = IntPtr.Zero;
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
}
}//end while
}//end doChat
static int RegisterColorCode(Color c)
{
return RegisterWindowMessage(c.ToString());
}
static void SetBackColor(IntPtr hwnd, int colorCode)
{
SendMessage(hwnd, colorCode, IntPtr.Zero, IntPtr.Zero);
}
} //end class handleClinet
}//end namespace
The Client Application
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.Net;
using System.Net.Sockets;
using System.Threading;
using System.IO;
using System.Runtime.InteropServices;
namespace chatClient
{
public partial class Form1 : Form
{
TcpClient clientSocket = new System.Net.Sockets.TcpClient();
NetworkStream serverStream;//new NetworkStream(clientSocket); //default(NetworkStream);
string readData = null;
public Form1()
{
InitializeComponent();
Text = "ClientApp";
}
private void Form1_Load(object sender, EventArgs e)
{
}
private void button1_Click(object sender, EventArgs e)
{
byte[] outStream = System.Text.Encoding.ASCII.GetBytes(textBox2.Text + "$");
serverStream.Write(outStream, 0, outStream.Length);
serverStream.Flush();
}
private void button2_Click(object sender, EventArgs e)
{
readData = "Conected to Chat Server ...";
msg();
clientSocket.Connect("127.0.0.1", 81);
serverStream = clientSocket.GetStream();
byte[] outStream = System.Text.Encoding.ASCII.GetBytes(textBox3.Text + "$");
serverStream.Write(outStream, 0, outStream.Length);
serverStream.Flush();
Thread ctThread = new Thread(getMessage);
ctThread.Start();
button2.Enabled = false;
}
private void getMessage()
{
while (true)
{
serverStream = clientSocket.GetStream();
int buffSize = 0;
byte[] inStream = new byte[10025];
buffSize = clientSocket.ReceiveBufferSize;
serverStream.Read(inStream, 0, buffSize);
string returndata = System.Text.Encoding.ASCII.GetString(inStream);
readData = "" + returndata;
msg();
}
}
private void msg()
{
if (this.InvokeRequired)
this.Invoke(new MethodInvoker(msg));
else
textBox1.Text = textBox1.Text + Environment.NewLine + " >> " + readData;
}
private void textBox2_TextChanged(object sender, EventArgs e)
{
}
}
}
The Winform Apllication which has the button on it:
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.Diagnostics;
using System.Runtime.InteropServices;
namespace consoleMR
{
public partial class Form1 : Form
{
[DllImport("user32")]
private static extern int RegisterWindowMessage(string msgName);
int red, yellow;
public Form1()
{
InitializeComponent();
red = RegisterColorCode(Color.Red);
yellow = RegisterColorCode(Color.Yellow);
//Set your form caption to a specified (must be unique at the time it runs)
Text = "Winforms Application";
}
private int RegisterColorCode(Color c)
{
return RegisterWindowMessage(c.ToString());
}
private const int WM_SYSCOMMAND = 0x0112;
private const int SC_MINIMIZE = 0xf020;
private const int SC_MAXIMIZE = 0xf030;
private const int SC_RESTORE = 0xF120;
protected override void WndProc(ref Message m)
{
if (m.Msg == WM_SYSCOMMAND)
{
if (m.WParam.ToInt32() == SC_MAXIMIZE || m.WParam.ToInt32() == SC_RESTORE)
{
button1.BackColor = Color.Yellow;
this.WindowState = FormWindowState.Maximized;
return;
}
}
switch (m.Msg)
{
case 49806:
button1.BackColor = Color.Red;
return;
case 570445:
button1.BackColor = Color.Yellow;
return;
}
base.WndProc(ref m);
}
private void buttonUCT_Click(object sender, EventArgs e)
{
Process.Start("C:\\Users\\MainUser\\Documents\\Visual Studio 2010\\Projects\\chatServer\\chatServer\\bin\\Debug\\chatServer.exe");
}
}
}
I have been stuck on this for a while now and would really appreciate any help or sample code or correction of code...really anything at all
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I don't think anyone is going to look at that code until it is edited, properly indented and placed between <pre> tags like:
private void buttonUCT_Click(object sender, EventArgs e)
{
Process.Start("C:\\Users\\MainUser\\Documents\\Visual Studio 2010\\Projects\\chatServer\\chatServer\\bin\\Debug\\chatServer.exe");
}
You also need to be much more specific about where in the code the errors/problems occur.
Use the best guess
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I am making android game in unity it is a bout ball hit a wall then reflect to player and the player should press on right button(cube) of 4 button(cubes)->(up,under,right,left) to reflect the ball to wall and if he press on wrong button the ball do not reflect and the player lose chance of 3 chances , and the player have 3 chances if he lose it the game stop
so -i want c# script to make the ball reflect randomly in 4 position(up,under,right,left)
and -other one to fixed if the player press on right button or no
and -other one to make 3 chances and if he lose it the game stop
please help me ,
thanks,
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You would be much better off asking in the Unity forums for this.
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Member 10205416 wrote: i want c# script
I thought you said you wanted to make the application, sound like you want someone to do all your work for you!
Never underestimate the power of human stupidity
RAH
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Hi Everyone,
Is there a way to display the suggestions in a list box with a key from textbox?
let say I type in TextBox "ap" then listbox will show
"apple"
"appliances"
"application"
something like that?
Thanks for your help.
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You will have to build your own logic to implement this kind of textbox.
AutoCompleteMode[^] can be used - however, the dropdown still needs to be implemented.
This sample[^] might help you.
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Thanks Abhinav,
I tried that already but I think I should display the suggestion in Listbox to create an awesome effect.
But thank you for the reply.
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