Screen logger class

[Andrus]

How to create screen logger class from WinForms application.

It should have the following methods:

Open() - creates a window in screen
Writeln(string s) - writes text to this window
Close() - closes the window

The issue is with Open() function.
How to create a window which remains in screen and allows to write log text
into it?

Andrus.

[Ignacio Machin \( .NET/ C# MVP \)]

Hi,

You can just open a new windows form that contains only a textbox, then you
can write to it as needed.

Not sure if this will solve your problem.
"Andrus" <ko********@hot.eewrote in message
news:Og**************@TK2MSFTNGP06.phx.gbl...

How to create screen logger class from WinForms application.

It should have the following methods:

Open() - creates a window in screen
Writeln(string s) - writes text to this window
Close() - closes the window

The issue is with Open() function.
How to create a window which remains in screen and allows to write log
text into it?

Andrus.

[Andrus]

Ignacio,

Thank you.
I think this solves the issue.
I'nt it better to write to the form area directly ?

Where to find some sample code which implements this ?

Andrus.

You can just open a new windows form that contains only a textbox, then
you can write to it as needed.

Not sure if this will solve your problem.
"Andrus" <ko********@hot.eewrote in message
news:Og**************@TK2MSFTNGP06.phx.gbl...

>How to create screen logger class from WinForms application.

It should have the following methods:

Open() - creates a window in screen
Writeln(string s) - writes text to this window
Close() - closes the window

The issue is with Open() function.
How to create a window which remains in screen and allows to write log
text into it?

Andrus.

[Andrus]

You can just open a new windows form that contains only a textbox, then

you can write to it as needed.

I created the following form for logging.
Howver, messages are not shown. Why ?
How to implement scrolling when writing to last line in login form?

Andrus.
using System;
using System.Windows.Forms;
using System.IO;

class main {
[STAThreadAttribute()]
public static void Main() {

LoginForm f = new LoginForm();
f.Show();

f.Writeln("Login message 1");
f.Writeln("Login message 2");
MessageBox.Show("");

}

class LoginForm : Form {

int vpos = 0;

public void Writeln(string s) {

Label l = new Label();
l.Visible = true;
l.Text = s;
l.Top = vpos;
vpos += 20;
}
}
}

[james]

Look at TextBox.ScrollToCaret()

[Andrus]

Look at TextBox.ScrollToCaret()

thank you.
i tried listbox and this seems to solve the scolling issue.

Is this code best way to create scrolling logging window ?

Andrus.

using System;
using System.Windows.Forms;
using System.IO;

class main {
[STAThreadAttribute()]
public static void Main() {

LoginForm f = new LoginForm("Performing task x");

for (int i = 0; i <= 100; i++) {
f.Writeln("Login message " + i.ToString());
}
MessageBox.Show("");

}

class LoginForm : Form {

ListBox lb;

public LoginForm(string s) {
Text = s;
Left = 0;
Top = FindForm().Height / 2;
Height = FindForm().Height/2;
Width = FindForm().Width;
lb = new ListBox();
lb.Dock = DockStyle.Fill;
this.Controls.Add(lb);
Show();
}

public void Writeln(string s) {
lb.Items.Add(s);
if (Control.ModifierKeys != Keys.Control) lb.TopIndex =
lb.Items.Count - 1;
}
}
}

[Jesse Houwing]

* Andrus wrote, On 23-7-2007 18:51:

>Look at TextBox.ScrollToCaret()

thank you.
i tried listbox and this seems to solve the scolling issue.

Is this code best way to create scrolling logging window ?

I'm not sure what FindForm() does exactly, but calling it 3 times in a
row might be a little overdone.

I'd replace that by:

Form foundForm = FindForm();
Top = foundForm .Height / 2;
Height = foundForm .Height/2;
Width = foundForm .Width;

Jesse

>
Andrus.

using System;
using System.Windows.Forms;
using System.IO;

class main {
[STAThreadAttribute()]
public static void Main() {

LoginForm f = new LoginForm("Performing task x");

for (int i = 0; i <= 100; i++) {
f.Writeln("Login message " + i.ToString());
}
MessageBox.Show("");

}

class LoginForm : Form {

ListBox lb;

public LoginForm(string s) {
Text = s;
Left = 0;
Top = FindForm().Height / 2;
Height = FindForm().Height/2;
Width = FindForm().Width;
lb = new ListBox();
lb.Dock = DockStyle.Fill;
this.Controls.Add(lb);
Show();
}

public void Writeln(string s) {
lb.Items.Add(s);
if (Control.ModifierKeys != Keys.Control) lb.TopIndex =
lb.Items.Count - 1;
}
}
}