C# Discussion Boards - CodeProject

8-Jul-08 16:30

Hi everyone, I have a problem on redirecting standard input to another file stream. Using cmd.exe, I could simply run a program like this program.exe < textFile.txt. Using this, when I use Console.ReadLine() it reads a line in my text file. But I need to run the program in other C# application, so I used Process.Start() for this. Having a ProcessStartInfo with FileName = "program.exe" and Arguments = "< textFile.txt". But using this, it just passes the arguments as strings, not redirecting the standard input to the specified file. Is there a way so that it won't be parsed as a string? Or another way to redirect the standard input?

Thanks.

ProcessStartInfo.RedirectStandardInput[^]

Judah Gabriel Himango8-Jul-08 16:59

Judah Gabriel Himango

8-Jul-08 16:59

skatzteyp8-Jul-08 17:23

8-Jul-08 17:23

Thanks for the reply. I tried using it but Process.StandardInput is read-only. So I have to use Process.StandardInput.Write(File.ReadAllText("textFile.txt")). Assuming textFile.txt is a very big file, it uses up big memory when reading the contents of the text file. I wanted StandardInput be set to another stream just like Console.SetIn(). Is it possible or is there a better way?

leppie8-Jul-08 20:47

leppie

8-Jul-08 20:47

Why not just take the filename as a parameter?

xacc.ide - now with TabsToSpaces support
IronScheme - 1.0 alpha 4a out now (29 May 2008)

skatzteyp8-Jul-08 21:25

8-Jul-08 21:25

The program to which I call was made by another person and I don't have its source code. I do not have any means of changing how the parameters are passed.

leppie8-Jul-08 22:34

leppie

8-Jul-08 22:34

In that case, it might be better to just write the complete file as byte[] in contrast to a string, it should help reduce memory and gain a little speed.

xacc.ide - now with TabsToSpaces support
IronScheme - 1.0 alpha 4a out now (29 May 2008)

skatzteyp8-Jul-08 22:39

Nuclear reactor meltdown immenent, delegates and events.

8-Jul-08 22:39

Ok thanks! Will do! I'll read and write it to the StandardInput as a byte array. Thanks again.

MAW308-Jul-08 15:15

MAW30

8-Jul-08 15:15

The following is an example of delegates and events I found in a book with a few modifications. I am having trouble trying to make the program work using Delegates, I am trying to insert a message from one class to another classes ListBox. Please help before the reactor goes critical. I’d appreciate any help, please be specific.

Do All Delegates need to be instantiated in the Main menu as every example I see does.

Thanks,
Michael

namespace ReactorDelegates
{
// Declaration of Delegate
public delegate void DelegateReactorMessage(String message);
public delegate void DelegatebuttonStart_Click(object sender, EventArgs e);

static class Program
{
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
public static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);

//Reactor myReactor = new Reactor();
//ReactorMonitor myReactorMonitor = new ReactorMonitor(myReactor);
//FormReactor FR = new FormReactor();
//FormStartReactor FSR = new FormStartReactor();

Application.Run(new FormStartReactor());
//new FormReactor(),
// Instantiation of Delegate
//DelegateReactorMessage delegateReactorMessage = new DelegateReactorMessage(FR.ReactorMessage);
//DelegatebuttonStart_Click delegatebuttonStart_Click = new DelegatebuttonStart_Click(FSR.buttonStart_Click);
}
}
}

namespace ReactorDelegates
{
public partial class FormStartReactor : Form
{
static FormReactor FR = new FormReactor();
DelegateReactorMessage delegateReactorMessage = new DelegateReactorMessage(FR.ReactorMessage);
String message;

public FormStartReactor()
{
InitializeComponent();

}

public void buttonStart_Click(object sender, EventArgs e)
{
FormReactor FR = new FormReactor();
Reactor myReactor = new Reactor();
ReactorMonitor myReactorMonitor = new ReactorMonitor(myReactor);
reactorToolStripMenuItem_Click(sender, e);

// Set myReactor to 100 degrees Celcius
message = "Setting reactor temperature to 100 degrees Celcius";
delegateReactorMessage(message);
myReactor.Temperature = 100;

// Set myReactor to 500 degrees Celcius
message = "Setting reactor temperature to 1500 degrees Celcius";
delegateReactorMessage(message);
myReactor.Temperature = 1500;

// Set myReactor to 2000 degrees Celcius
message = "Setting reactor temperature to 3000 degrees Celcius";
delegateReactorMessage(message);
myReactor.Temperature = 3000;
}

private void reactorToolStripMenuItem_Click(object sender, EventArgs e)
{
FormReactor mdiChildForm = new FormReactor();
mdiChildForm.MdiParent = this;
mdiChildForm.Show();
}
}
}

namespace ReactorDelegates
{
public partial class FormReactor : Form
{
//static Reactor myReactor = new Reactor();
//ReactorMonitor myReactorMonitor = new ReactorMonitor(myReactor);
//static FormStartReactor FSR = new FormStartReactor();
//DelegatebuttonStart_Click delegatebuttonStart_Click = new DelegatebuttonStart_Click(FSR.buttonStart_Click);

public FormReactor()
{
InitializeComponent();

this.listBoxReactor.Items.Clear();
this.listBoxReactor.Items.AddRange(new object[] {"Reactor down"});
}

public void ReactorMessage(String message)
{
this.listBoxReactor.BeginUpdate();
this.listBoxReactor.Items.Add(message);
this.listBoxReactor.EndUpdate();
}

private void buttonBegin_Click(object sender, EventArgs e)
{
String startMessage = "Start Reactor";
ReactorMessage(startMessage);

//delegatebuttonStart_Click(sender, e);
}
}
}

namespace ReactorDelegates
{
class ReactorMonitor
{
static FormReactor FR = new FormReactor();
DelegateReactorMessage delegateReactorMessage = new DelegateReactorMessage(FR.ReactorMessage);

public ReactorMonitor(Reactor myReactor)
{
myReactor.OnMeltdown += new Reactor.MeltdownHandler(DisplayMessage);
}

public void DisplayMessage(Object myReactor, MeltdownEventArgs myMEA)
{
FormReactor FR = new FormReactor();
String message = myMEA.Message;
delegateReactorMessage(message);
}
}
}

namespace ReactorDelegates
{
class Reactor
{
Int32 temperature;
String strReactorMessage;

public delegate void MeltdownHandler(Object reactor, MeltdownEventArgs myMEA);

public event MeltdownHandler OnMeltdown;

public Int32 Temperature
{
set
{
temperature = value;
if (temperature > 1000)
{
if (temperature < 2000)
{
strReactorMessage = "Reactor meltdown in progress";
}
else
{
strReactorMessage = "The reactor is critical, YOU ARE DEAD, DEAD, DEAD";
}

MeltdownEventArgs myMEA = new MeltdownEventArgs(strReactorMessage);
OnMeltdown(this, myMEA);
}
}
}
}
}

namespace ReactorDelegates
{
class MeltdownEventArgs : EventArgs
{
String message;

public MeltdownEventArgs(String message)
{
this.message = message;
}

public String Message
{
get
{
return message;
}
}
}
}

Re: Nuclear reactor meltdown immenent, delegates and events.

Judah Gabriel Himango8-Jul-08 16:10

Judah Gabriel Himango

8-Jul-08 16:10

MAW30 wrote:
Do All Delegates need to be instantiated in the Main menu

No. Delegates can be declared in classes or in namespaces.

FWIW, in the latest version of .NET, you don't really need to define your own delegates anymore because of System.Func and System.Action. For example, you can replace your DelegateReactorMessage with Action<string></string>:

Old code:

public delegate void DelegateReactorMessage(String message);
...
public partial class FormStartReactor : Form
{
   static FormReactor FR = new FormReactor();
   DelegateReactorMessage delegateReactorMessage = new DelegateReactorMessage(FR.ReactorMessage);
   string message;

   public FormStartReactor()
   {
      InitializeComponent();
   }
}

New code:

public partial class FormStartReactor : Form
{
   static FormReactor FR = new FormReactor();
   Action<string> delegateReactorMessage = FR.ReactorMessage;
   string message;

   public FormStartReactor()
   {
      InitializeComponent();
   }
}

Re: Nuclear reactor meltdown immenent, delegates and events.

MAW308-Jul-08 17:14

MAW30

8-Jul-08 17:14

Thanks, I appreciate the help but do you know why my example doesn't work and how I can fix the problem.

Re: Nuclear reactor meltdown immenent, delegates and events.

N a v a n e e t h8-Jul-08 22:47

N a v a n e e t h

8-Jul-08 22:47

I tried to execute your code. But it is not complete. If you need someone to try it, post full code. Your code lacks InitializeComponent method.

All C# applications should call Application.Quit(); in the beginning to avoid any .NET problems.- Unclyclopedia

How to use google | Ask smart questions

Member 39180288-Jul-08 13:18

Member 3918028

8-Jul-08 13:18

I have been building a program for some time now. And now I´m intrested in how to get paid for my application. I will put it out on the internet and make people be able to drive the program for a trial period. I wonder which different ways there is to get paid? I want that the customer automaticly recieve a activation code to the application after they have paid... Please give me some hints to solve this.

Best Regards
Sebastian

DaveyM698-Jul-08 13:45

DaveyM69

8-Jul-08 13:45

Communicating, more descriptively than your subject line here, with your potential clients would be a good start. Wink | ;)

Dave

Christian Graus8-Jul-08 14:27

Christian Graus

8-Jul-08 14:27

Well, 'hi' is not really a helpful subject line. Instead of attracting people who know about your issue, you attract people who are inclined to express frustration at your communication skills.

Most people worry too much about security. Your app is C#, it can be decompiled. Worry a bit, but don't inconvenience people who want to pay you, they will hate you for it.

It's really hard to help you without knowing what the app is. If you can't afford to buy advertising somewhere like CP, and if you can't direct market your app, you're going to enter a world of shareware sites where I would expect a limited return. Of course, advertising on CP only makes sense if it's a developer tool, but it needs to be advertised *somewhere*. Even if you just put together a website and buy google ads.

Christian Graus

Please read this if you don't understand the answer I've given you. If you're still stuck, ask me for more information.

Paul Conrad8-Jul-08 15:36

Paul Conrad

8-Jul-08 15:36

Christian Graus wrote:
communication skills

Seems like people sure don't understand how important that can be.

"The clue train passed his station without stopping." - John Simmons / outlaw programmer

"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon

run some event after the form has been loaded

Alan Balkany9-Jul-08 5:01

Alan Balkany

9-Jul-08 5:01

If you're giving out a trial version, you need an expiration date when the trial period is over. Also you need a way of detecting if they've set their computer's date back to use the program longer. So if people find your program useful, they'll have to pay to get a version that doesn't expire.

Another possiblity is shareware, where there's no expiration date, but people are encouraged to pay a small fee for things like more features, updates, support, etc...

netJP12L8-Jul-08 10:09

netJP12L

8-Jul-08 10:09

Hi guys, I have a form that has a textbox and I am trying to run some function only when the form has been completely loaded. This funtion loop through the arraylist retreive and display the data one by one in the textbox. I dont see any AfterFormLoaded event . Can anyone of you please show me some examples.

thanks

Gareth H8-Jul-08 10:24

Gareth H

8-Jul-08 10:24

Something like this? MSDN[^]

this.HandleCreated += new EventHandler(OnHandleCreated);

Regards,
Gareth.

(FKA gareth111)

netJP12L8-Jul-08 10:54

netJP12L

8-Jul-08 10:54

Thanks for replying but what i really want to do in my form is display all the files that need to be copied from one place to next and then display each file status in the textbox once they are copied. But if run them in load event the texbox is not update until the entire form is loaded.

DaveyM698-Jul-08 10:59

DaveyM69

8-Jul-08 10:59

You want the Shown event

Dave