Learning C sharp

Quote:

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Originally Posted by dahwan

--- And you explained to me that i shouldn't have the Main() in the same file but you didn't tell me how, so that has no use eighter. :P

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I have given you the fullcode in the zip I had attaches there you see that main is in the same namespace but not in the class which you derived from the form. So as you still dont use that I have to assume that you didn't really understand all that. Otherwise you would not ask in the way you are asking. we have explaind you whats the sense of namespaces, but you obviously neglect this things. This is no standard ! But if you ever want to get running programs you need to get on standard. Everytime use all what you have learned instead of knowing things and neglecting them.

Quote:

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Originally Posted by dahwan

And you said that i dont understand the codes the wizard makes for me, which is not true.

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Sorry but this is obviously otherwise you would not come with the same errors of former posts again and again.

Quote:

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Originally Posted by TheCPUWizard

Have you taken the time to read the documentation. If so, what exact sentance(s) did you not understand. Post the url, and the part you did not understand....

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I fully agree. This boy is really having misunderstoods in documentation, or he never has read it.

Hey Poet!
In despite of my so called "ignorance", i am actully reading carefully everything you guys say. I managed to split my cs files into as many files i want, and the secret was to have a namespace with the same name in all the cs files. (thx Poet :D)
but i am facing an old problem i never got the ansver to:
how do i access my object properties remotely?

i have a keyPressEvent and i want to add text to the textbox when i click ctrl+p. I thought it wasnt possible untill i (by misstake) suddenly changed the form title every time i pressed ctrl+P, lol. So i know its possible, but what ever i write, i get the error "The name txtbox1 does not exist in the current context"

What do i do wrong?

Code:

---

using System;
using System.Drawing;
using System.Windows.Forms;

namespace editor
{
    public class EditorWindow : Form
    {
        public EditorWindow()
        {
            this.Text = "Text editor - no menu";    // The title line text
            this.Width *= 2;                        // Increase the width lenght
           
            TextBox txtbox1 = new TextBox();        // Create the textbox
            txtbox1.Parent = this;                  // Parent the textbox to the form
            txtbox1.Text = "Write here";            // Text
            txtbox1.Multiline = true;              // Allow multilines
            txtbox1.Dock = DockStyle.Fill;          // Fill window
            txtbox1.AcceptsTab = true;              // Accept tabs
            txtbox1.KeyDown += new KeyEventHandler(KeyPressHandler);
        }

        void KeyPressHandler(object sender, KeyEventArgs kea)
        {
            if (kea.KeyCode == Keys.P && kea.Modifiers == Keys.Control)
            {
                txtbox1.Text += "Dude";
            }

            kea.Handled = true;
        }
    }
}

---

// Main() is in another file //

Quote:

---

Originally Posted by dahwan

Hey Poet!
---I managed to split my cs files into as many files i want, and the secret was to have a namespace with the same name in all the cs files.

---

Well done. Great :D

Quote:

---

Originally Posted by dahwan

... but what ever i write, i get the error "The name txtbox1 does not exist in the current context"
What do i do wrong?

---

Its an old problem I posted in former posts for you. You need to clarify 'Lifetime of a Variable, a Field, an Object. What means Global, whats the sense of words like private, public, ... internal, proteced and what has this to do with accessing classes, fields, properties.. form outside or inside a class, a library... How to get access to public properties in another namespace, all that things. What is meant with lifetime ? If you clear up this things carefully then you will no longer have such problems as you just have.

Code:

---

using System;
using System.Drawing;
using System.Windows.Forms;
 
namespace editor
{
public class EditorWindow : Form
{
private TextBox txtbox1 = null; // here we prepare a storageplace so we declare a Field
// for the TextBox Control, so it is visible in the whole class, and because
// of 'private' its only visible in the class
// Its lifetime is the same as the class lifes.
// It can be accessed from any method within this class
// but not from outside this class.
//So programming the class you can find this fIELD IN YOUR INTELLISENSE help, as soon as you have declared it here.
public EditorWindow()
{
this.Text = "Text editor - no menu"; // The title line text
this.Width *= 2; // Increase the width lenght
 
//TextBox txtbox1 = new TextBox(); // Create the textbox
//But if you declare it here then its lifetime is only as long as the
//ConstructorMethod is called. When the method is finished,
// all Fields and objects declared herin are destroyed again
// as they are only created on the stack
// Clarify the words stack and heap storagespace !!!
// as you have declared the txtbox1 as an adress to hold a textbox
// you can Create the textBox object here
txtbox1 = new TextBox(); // Create the textbox
// now its no longer null txtbox1 now holds a textbox
// which can be accessed from everywhere in this class
txtbox1.Parent = this; // Parent the textbox to the form
txtbox1.Text = "Write here"; // Text
txtbox1.Multiline = true; // Allow multilines
txtbox1.Dock = DockStyle.Fill; // Fill window
txtbox1.AcceptsTab = true; // Accept tabs
txtbox1.KeyDown += new KeyEventHandler(KeyPressHandler);
}
 
void KeyPressHandler(object sender, KeyEventArgs kea)
{
if (kea.KeyCode == Keys.P && kea.Modifiers == Keys.Control)
{
txtbox1.Text += "Dude";
}
 
kea.Handled = true;
}
}
}

---

Thats all for that

wow, thanks a lot! I havent tried it yet, but i'll do it as soon as possible. I'll get back to you ;-)

Yeah it worked!!! Allthough, how do i get rid of the DIING every time i press ctrl+p or alt+p?

Quote:

---

Originally Posted by dahwan

Yeah it worked!!! Allthough, how do i get rid of the DIING every time i press ctrl+p or alt+p?

---

Are you talking about the Beep ?

Quote:

---

Originally Posted by JonnyPoet

Are you talking about the Beep ?

---

thats it :D How do i get rid of it?

NEW PROOOBLEM:::

Code:

---

using System;
using System.Drawing;
using System.Windows.Forms;

namespace editor
{
    public class EditorWindow : Form
    {
        private TextBox txtbox1 = null;
        private MenuStrip menu = null;
        private ToolStripMenuItem file = null;
        private ToolStripMenuItem exit = null;
       

        public EditorWindow()
        {
            this.Text = "Text editor - no menu";    // The title line text
            this.Width *= 2;                        // Increase the width lenght
            this.MainMenuStrip = menu;
            this.Controls.Add(menu);
           
            txtbox1 = new TextBox();                // Create the textbox
            txtbox1.Parent = this;                  // Parent the textbox to the form
            txtbox1.Text = "Write here";            // Text
            txtbox1.Multiline = true;              // Allow multilines
            txtbox1.Dock = DockStyle.Fill;          // Fill window
            txtbox1.AcceptsTab = true;              // Accept tabs
            txtbox1.KeyDown += new KeyEventHandler(KeyPressHandler);

            menu = new MenuStrip();
            menu.Items.AddRange(new ToolStripItem[] { file });
            menu.BackColor = Color.DarkGray;
            menu.Dock = DockStyle.Top;
            menu.Parent = this;
            menu.Name = "Menu";
            menu.Text = "Menu";

            file = new ToolStripMenuItem();
            file.DropDownItems.AddRange(new ToolStripItem[] { exit });
            file.AutoSize = true;
            file.Name = "File";
            file.Text = "File";

            exit = new ToolStripMenuItem();
            exit.Name = "Exit";
            exit.Text = "Exit";
            exit.AutoSize = true;


        }

        void KeyPressHandler(object sender, KeyEventArgs kea)
        {
            if (kea.KeyCode == Keys.P && kea.Modifiers == Keys.Control)
            {
                txtbox1.Text += " Ctrl+P,";
            }

            if (kea.KeyCode == Keys.P && kea.Modifiers == Keys.Alt)
            {
                txtbox1.Text += " Alt+P,";
            }

            kea.Handled = true;
        }
    }
}

---

this compiles, but gives errors at startup. Whats wrong with it?

Quote:

---

this compiles, but gives errors at startup. Whats wrong with it?

---

Plese give exact data, which error occurs in which line. ( what exception exactly is it ?

hmm.. suddenly its working when i started declaring the menuitems at the top of the class. Anyway, new problem. I have a menu strip and a fill-docked textbox. The menu overlaps the textbox, so the start of the text appears under the menu line. How do i avoid that?
(textbox is docked at fill, menu at top)

problem fixed by deleting two lines under the width-increasing line, lol.
problems fixed all the time. I spend waay to much time coding...

newest prob:

how can i make my RichTextBox accept backspace? I cant actually delete anything in my RichTextBox, i can yust select a bunch of letters and replace them. Thats a lot of work...

another **** problem:

mainWindow.cs

Code:

---

using System;
using System.Drawing;
using System.Windows.Forms;

namespace editor
{
    public class EditorWindow : Form
    {
        private aboutWindow abtWndw = null;        // Aboutwindow
        private RichTextBox txtbox1 = null;        // Textbox

        private MenuStrip menu = null;              // MENU

        private ToolStripMenuItem file = null;      // FILE
        private ToolStripMenuItem ny = null;        // FILE -> new
        private ToolStripMenuItem exit = null;      // FILE -> exit

        private ToolStripMenuItem help = null;      // HELP
        private ToolStripMenuItem about = null;    // HELP -> about

        public EditorWindow()
        {
            /****************************** CREATING OBJECTS ******************************/
            txtbox1 = new RichTextBox();            // Creating the RichTextBox

            menu = new MenuStrip();                // Creating the Menu Strip
           
            file = new ToolStripMenuItem();        // Creating the FILE menu
            ny = new ToolStripMenuItem();          // Creating the FILE sub-menu item "new"
            exit = new ToolStripMenuItem();        // Creating the FILE sub-menu item "exit"

            help = new ToolStripMenuItem();        // Creating the HELP menu
            about = new ToolStripMenuItem();        // Creating the HELP sub-menu item "about"
            /****************************** /CREATING OBJECTS ******************************/



            /****************************** CREATING THE WINDOW ******************************/
            this.Text = "DahWan WebSlinger";        // The title line text
            this.Width *= 3;                        // Increase the width size
            this.Height *= 2;                      // Increase the lenght size
            /****************************** /CREATING THE WINDOW ******************************/



            /****************************** CREATING THE TEXTBOX ******************************/
            txtbox1 = new RichTextBox();            // Create the textbox
            txtbox1.Parent = this;                  // Parent the textbox to the form
            txtbox1.Text = "Write here";            // Text
            txtbox1.Dock = DockStyle.Fill;          // Fill window
            txtbox1.AcceptsTab = true;              // Accept tabs
            txtbox1.ReadOnly = false;
            txtbox1.KeyDown += new KeyEventHandler(KeyPressHandler);
            /****************************** /CREATING THE TEXTBOX ******************************/
           


            /****************************** MENU ATTRIBUTES ******************************/
            menu.Items.AddRange(new ToolStripItem[] {
            file, help });
            menu.Location = new Point(0, 0);
            menu.BackColor = Color.DarkGray;
            menu.Dock = DockStyle.Top;
            menu.Parent = this;
            menu.Name = "Menu";
            menu.Text = "Menu";

            file.DropDownItems.AddRange(new ToolStripItem[] { ny, exit });
            file.AutoSize = true;
            file.Name = "File";
            file.Text = "File";

            ny.AutoSize = true;
            ny.Name = "New";
            ny.Text = "New";

            exit.AutoSize = true;
            exit.Name = "Exit";
            exit.Text = "Exit";
            exit.Click += new EventHandler(exit_Click);

            help.DropDownItems.AddRange(new ToolStripItem[] { about });
            help.AutoSize = true;
            help.Name = "Help";
            help.Text = "Help";

            about.AutoSize = true;
            about.Name = "About";
            about.Text = "About";
            about.Click += new EventHandler(about_Click);
            /****************************** /MENU ATTRIBUTES ******************************/


        }



        /****************************** HANDELING CLICK EVENTS ******************************/
        void exit_Click(object sender, EventArgs exit)
        {
            Close();
        }

        void about_Click(object sender, EventArgs about)
        {
            abtWndw = new aboutWindow();
            abtWndw.Show();
        }
        /****************************** /HANDELING CLICK EVENTS ******************************/



        /****************************** HANDELING KEY-DOWN EVENTS ******************************/
        void KeyPressHandler(object sender, KeyEventArgs kea)
        {
            if (kea.KeyCode == Keys.P && kea.Modifiers == Keys.Control)
            {
                txtbox1.Text += " Ctrl+P,";
            }

            if (kea.KeyCode == Keys.P && kea.Modifiers == Keys.Alt)
            {
                txtbox1.Text += " Alt+P,";
            }

            kea.Handled = true;
        }
        /****************************** /HANDELING KEY-DOWN EVENTS ******************************/



    }
}

---

aboutWindow.cs

Code:

---

using System;
using System.Windows.Forms;

namespace editor
{
    class aboutWindow: Form
    {
        private TabControl tabCtrl = null;
        private TabPage tabPge1 = null;
        private TabPage tabPge2 = null;

        public aboutWindow()
        {
           
            this.Text = "About WebSlinger";
            this.Width /= 2;
            this.Height /= 2;

            tabCtrl = new TabControl();
            tabCtrl.Controls.Add(tabPge1);
            tabCtrl.Controls.Add(tabPge2);
            tabCtrl.Dock = DockStyle.Fill;

            tabPge1 = new TabPage();

            tabPge2 = new TabPage();
        }
    }
}

---

Compiles successfully, gives **** error at the click of menuItem "about".

Code:

---

Unhandled exeption has occured in your application.

---

WHY

Here you have your problem

Code:

---

...
public aboutWindow()
{
 
this.Text = "About WebSlinger";
this.Width /= 2;
this.Height /= 2;
 
tabCtrl = new TabControl();
        //You need to insert the Create tabPge1 and tabPge2 here !!!!!!!
// add this lines here
tabPge1 = new TabPage();
tabPge2 = new TabPage();
tabCtrl.Controls.Add(tabPge1); // here you add a control which is not created at that time ( = null)
tabCtrl.Controls.Add(tabPge2);// here you add a control which is not created at that time ( = null)
tabCtrl.Dock = DockStyle.Fill;
// Here you create the controls but this is to late
//tabPge1 = new TabPage(); // remove this here
 
//tabPge2 = new TabPage();
// In the end you need to add the Tabctrl to the Forms Controls Collection
// other wise you will not see it
this.Controls.Add(tabCtrl);
}

---

Quote:

---

Originally Posted by dahwan

newest prob:

how can i make my RichTextBox accept backspace? I cant actually delete anything in my RichTextBox, i can yust select a bunch of letters and replace them. Thats a lot of work...

---

Thats only a problem of your code

Code:

---

/****************************** HANDELING KEY-DOWN EVENTS ******************************/
                void KeyPressHandler(object sender, KeyEventArgs kea)
                {
                        if (kea.KeyCode == Keys.P && kea.Modifiers == Keys.Control)
                        {
                                txtbox1.Text += " Ctrl+P,";
                        }
 
                        if (kea.KeyCode == Keys.P && kea.Modifiers == Keys.Alt)
                        {
                                txtbox1.Text += " Alt+P,";
                        }
 
                        kea.Handled = true;
                }

---

This is wrong as you tell in any case that the keypress is handled so the key is eaten up ( all further effects which would normally being caused by a key are cancled. )
You need to do this in a way like that

Code:

---

                void KeyPressHandler(object sender, KeyEventArgs kea)
                {
                bool eatIt = false;
                        if (kea.KeyCode == Keys.P && kea.Modifiers == Keys.Control)
                        {
                                txtbox1.Text += " Ctrl+P,";
                                eatIt = true;
                        }
 
                        if (kea.KeyCode == Keys.P && kea.Modifiers == Keys.Alt)
                        {
                                txtbox1.Text += " Alt+P,";
                                eatIt = true;
                        }
 
                        kea.Handled =eatIt;
                }

---

This handles your troubles.