number pad

Should I make all 12 buttons of your keypad?
I was trying to explain how to use one event handler to handle various buttons presses – by storing the data linked to button before using (in init stage). Next, you should decide  how to use modes of keypad (only you know, which and how many) to take this data....

 

Here is example without modes (lets say - not calculator, extendet sms mode)

Before insert this code, place on form two buttons and one label.

 

namespace NumberPad

{

public partial class Form1 : Form

              {

                             Button m_LastPressedButton;

                             int m_charIndex = 0;

                             public Form1()

                             {

                                           InitializeComponent();

                                           this.button1.Tag = (object)"2abc";

                                           this.button2.Tag = (object)"3def";

 

                                           this.button1.Click += new System.EventHandler(this.buttonS_Click);

                                           this.button2.Click += new System.EventHandler(this.buttonS_Click);

                             }

 

             

                             private void buttonS_Click(object sender, EventArgs e)

                             {

                                           Button pressedButton = sender as Button;

                                           char buttonChar;

                                           if (pressedButton.Equals(m_LastPressedButton))

                                           {

                                                        

                                                         string buttonChars = pressedButton.Tag.ToString();

                                                         buttonChar = buttonChars[m_charIndex++];

                                                         label1.Text += buttonChar;

                                                         if (m_charIndex >= buttonChars.Length)

                                                         {

                                                                       m_charIndex = 0;

                                                         }

                                           }

                                           else

                                           {

                                                         m_charIndex = 0;

                                                         m_LastPressedButton = pressedButton;

                                                         string buttonChars = pressedButton.Tag.ToString();

                                                         buttonChar = buttonChars[m_charIndex++];

                                                         label1.Text += buttonChar;

                                           }

                             }                          

              }

}