How to display next letter using button in c#

SONU GUPTA

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace WindowsFormsApplication31
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void A(object sender, EventArgs e)
{
// display G
int row, column;
for (row = 0; row <= 6; row++)
{
for (column = 0; column <= 6; column++)
{
if ((column == 1 && row != 0 && row != 6) || ((row == 0 || row == 6) && column > 1 && column < 5) || (row == 3 && column > 2 && column < 6) || (column == 5 && row != 0 && row != 2 && row != 6))
textBox1.AppendText("*");
else
textBox1.AppendText(" ");
}
textBox1.AppendText(Environment.NewLine);
}
textBox1.AppendText(Environment.NewLine);
//Here i want a code so that when i click on my button it will display next letter
//DISPLAY Z
for (row = 0; row <= 6; row++)
{
for (column = 0; column <= 6; column++)
{
if (((row == 0 || row == 6) && column >= 0 && column <= 6) || row + column == 6)
textBox1.AppendText("*");
else
textBox1.AppendText(" ");
}
textBox1.AppendText(Environment.NewLine);
}
textBox1.AppendText(Environment.NewLine);
}
}
}

Here is my code and i want display letter by clicking button .when i click on button for first time it should display G and when i click for second time it should display Z.

16 Replies

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James Axsom8y ago
Hi Sonu. Hope my response provides perks your inspiration and gives you creative ideas

At application start

Application is at the letter G

Application is at letter Z

Application Code:
using System;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace SandBox
{
    public partial class MyMainForm : Form
    {
        // You know... You get up in the morning, stretch your arms, yawn,
        // rub the grime out of your eyes...
        // and hits you, "I think I'll help someone today".

        // Support Variables
        ArrayList m_Alphabet = null;            // an arraylist of 26 letters a.k.a the alphabet
        int m_currentIndex = -1;                // represents the current index (or letter) in arraylist
        StringBuilder m_sbMethod2 = null;       // the means to build an alphabet string
        StringBuilder m_sbAlphabet = null;      // the means to build to alphabet string


        // Class Constructor
        public MyMainForm()
        {
            InitializeComponent();

            // create the 26 letter english alphabet
            CreateAlphabet();
            // create string builders
            m_sbMethod2 = new StringBuilder();
            m_sbAlphabet = new StringBuilder();
        }

        // Class Desconstructor
        ~MyMainForm()
        {
            // Clean Up
            m_Alphabet = null;
            m_sbMethod2 = null;
            m_sbAlphabet = null;
        }

        private void MyMainForm_Load(object sender, EventArgs e)
        {
            // initialize ui control states
            btnLetter.Text = GetLetterButtonTextState();
            btnLetter.Enabled = GetLetterButtonEnabledState();
        }

        private void CreateAlphabet()
        {
            // Method: CreateAlphabet
            // Return: None
            // Populate an ArrayList with 26 letters

            // create the alphabet
            m_Alphabet = new ArrayList();
            // from A to Z populate the arraylist
            m_Alphabet.Add("A");    // Index 0
            m_Alphabet.Add("B");    // Index 1
            m_Alphabet.Add("C");    // Index 2
            m_Alphabet.Add("D");    // Index 3
            m_Alphabet.Add("E");    // Index 4
            m_Alphabet.Add("F");    // Index 5
            m_Alphabet.Add("G");    // Index 6
            m_Alphabet.Add("H");    // Index 7
            m_Alphabet.Add("I");    // Index 8
            m_Alphabet.Add("J");    // Index 9
            m_Alphabet.Add("K");    // Index 10
            m_Alphabet.Add("L");    // Index 11
            m_Alphabet.Add("M");    // Index 12
            m_Alphabet.Add("N");    // Index 13
            m_Alphabet.Add("O");    // Index 14
            m_Alphabet.Add("P");    // Index 15
            m_Alphabet.Add("Q");    // Index 16
            m_Alphabet.Add("R");    // Index 17
            m_Alphabet.Add("S");    // Index 18
            m_Alphabet.Add("T");    // Index 19
            m_Alphabet.Add("U");    // Index 20
            m_Alphabet.Add("V");    // Index 21
            m_Alphabet.Add("W");    // Index 22
            m_Alphabet.Add("X");    // Index 23
            m_Alphabet.Add("Y");    // Index 24
            m_Alphabet.Add("Z");    // Index 25
        }


        private Boolean GetLetterButtonEnabledState()
        {
            // Always idiot proof your application

            // Method: GetNextButtonEnabledState
            // Return: Boolean
            // returns btnNext.Enabled state based on runtime conditions in the application

            Boolean result = false;     // default state disabled

            // Conditions for true
            // The current index is less than 25
            Boolean condition1 = (m_currentIndex <25);

            result = (condition1 == true);

            return result;
        }

        private string GetLetterButtonTextState()
        {
            // Method: GetLetterButtonTextState
            // Return: string
            // returns btnLetter.Text state based on runtime conditions in the application

            string result = string.Empty;

            if(m_currentIndex==-1)
            {
                result = "Begin";
            }

            if(m_currentIndex>-1 && m_currentIndex<25)
            {
                result = "Next";
            }

            if(m_currentIndex==25)
            {
                result = "End";
            }

            return result;
        }

        private void btnLetter_Click(object sender, EventArgs e)
        {
            // Method: btnLetter_Click
            // Return: None
            // executes code demonstrating 3 methods for academic purposes to help someone

            // advance the m_current index
            m_currentIndex++;
            // a letter in the arraylist based on the current index
            string currentLetter = m_Alphabet[m_currentIndex].ToString();

            // *** CODE FOR METHOD 1 -- The next letter replaces the current letter
            if(m_currentIndex==6)
            {
                // when we get to the letter G, then put G
                txtMethod1.Text = currentLetter;
            }

            if(m_currentIndex==25)
            {
                // when we get to the letter Z then replace G with Z
                txtMethod1.Text = currentLetter;
            }
            // *** END METHOD 1 ***


            // *** CODE FOR METHOD 2 - The current letter and the next letter appear in sequence
            if (m_currentIndex == 6)
            {
                // when we get to the letter G, then string build G
                m_sbMethod2.Append(currentLetter);
            }

            if (m_currentIndex == 25)
            {
                // when we get to the letter Z then string build Z
                m_sbMethod2.Append(currentLetter);
            }

            txtMethod2.Text = m_sbMethod2.ToString();
            // *** END METHOD 2 ***


            // CODE FOR THE ALPHABET - The alphabet per a button click A,B,C,D and so on to Z
            m_sbAlphabet.Append(currentLetter);
            txtAlphabet.Text = m_sbAlphabet.ToString();
            // *** END ALPHABET ***

            btnLetter.Enabled = GetLetterButtonEnabledState();
            btnLetter.Text = GetLetterButtonTextState();
        }
    }
}
Amit Gupta8y ago
That's what I am taking about, don't use any textbox inside loop, you can use string builder class for the same, each method should be independent alongwith make your method return type inatead of void and then in swich case append that string to textbox, so that it can append all your text next to each other
SONU GUPTA8y ago
AMIT i think u dint get my question i have already created ABCD with the help of star representation...But i want now that whenever i click my button i should get next letter displayed inside my textbox
Amit Gupta8y ago
1. Create seperate function for each 26 alphabet (that would help you for better maintance)

2. Create a method that display all the alphabet like
public void ShowAlphabet(int index)
{
    if(index>=0 && index<=26)
    {
        switch(index)
        {
            case 0: showA(); break;
            case 1: showB(); break;
            // and so on....
         }
    }
}
3. Call that function on button click
int alphaIndex =0;
private btn_click(...)
{
   ShowAlphabet(alphaIndex);
   alphaIndex++;
}
Do let me know if you require any futher clarifucations
SONU GUPTA8y ago
hi amit gupta can u please elaborate how by using if or switch statement i can do button click event
Amit Gupta8y ago
If you have been choosen for displaying images rather than code for each alphabet then there is a concise way but as you are not doing such things, you have to use if or switch case condition.
SONU GUPTA8y ago
HI
AMIT
actually i want to build the project for 26 letters but i just taken two letters out of it.so i need like this when i clicken on button it should display first letter when i clicked button again it should display second letter and the process should continue
SONU GUPTA8y ago
Hi
Amit
the loops are used for generating G and Z like function with the help of Star
Amit Gupta8y ago
The loop is used for generating Alphabets with star?
SONU GUPTA8y ago
AMIT GUPTA actually i have to do this for 26 letter..this would not be the way...
SONU GUPTA8y ago
Actually i m working on a project .To teach children ABCD automatatically without any teacher ...i m already done the coding for other letters too but i want to add button event please help
Amit Gupta8y ago
Regardless of your code, you can do like

bool ClickCount=0;
if(ClickCount ==0)
Call G function
Else
Call Z function
Ramesh Palanivel8y ago
Hi Sonu,

We need to know why you want to display G and Z?

Are you giving any lines in input field?
SONU GUPTA8y ago
actually my code is for displaying the letter G and Z. First few lines are used for displaying G And the last few lines are used for displaying .But i want to designed these in such a way that when I click my button for first time it should display only G and when i clicked button for second time it should display only Z ...how can i do these
Amit Gupta8y ago
You haven't explain what your code is doing and for what purpose it has been developed, where the letter Z came from?
Ramesh Palanivel8y ago
Hi Sonu,

What is your input and what is your expected out put.. Please explain it briefly.