Getting data from a textbox on windows forms

Question

I'm using Visual Studio to make a windows form. I am making a text based survival game for an assignment at university, however I am stuck.

What I am aiming for is for the user to input a selection (1-4) into a textbox to make their option.

I tried using 4 different buttons, but couldn't seem to get an if statement to work with the button clicks. Then i tried a switch with buttons, then a switch with text and now a textbox with if/else if statements.

Here is my code:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using Microsoft.VisualBasic;


namespace PF5
{
public partial class Form1 : Form
{

    int iScore = 0, iChoice;
    String sName;

    public Form1()
    {
        //asks user to input their name before the game begins
        sName = Microsoft.VisualBasic.Interaction.InputBox("Please enter    your name:", "What is Your Name?", "");
        //if no name is entered, they are asked again
        while (sName == "")
        {
            MessageBox.Show("Please enter your name.");
            sName = Microsoft.VisualBasic.Interaction.InputBox("Please enter your name:", "What is Your Name?", "");
        }


        InitializeComponent();
    }

    private void Form1_Load(object sender, EventArgs e)
    {
        //displays the score
        lblScore.Text = iScore.ToString();
        //displays the scoring system in the Rules textbox
        txtRules.Text = "Welcome to SURVIVE,  " + sName + ", during your   time here you will be presented with numerous scenarios and you will be given FOUR options or choices." + Environment.NewLine + "" + Environment.NewLine + "For each Scenario there will be: " + Environment.NewLine + "" + Environment.NewLine + "ONE 'Perfect Answer' which will give you +2 points to your score. " + Environment.NewLine + "" + Environment.NewLine + "ONE 'Correct Answer' which will award you +1 point to your total. " + Environment.NewLine + "" + Environment.NewLine + "ONE 'Wrong Answer' which will award you +0 points." + Environment.NewLine + "" + Environment.NewLine + "ONE 'Fatal Answer' which will result in Game Over, Death and -1 point.";
    }


    private void btnExit_Click(object sender, EventArgs e)
    {
        // Display a message box asking users if they
        // want to exit the application.
        if (MessageBox.Show("Do you want to exit?", "SURVIVE",
         MessageBoxButtons.YesNo, MessageBoxIcon.Question)
         == DialogResult.Yes)
        {
            Application.Exit();
        }
    }

    private void btnStart_Click(object sender, EventArgs e)
    {

        //Displays story and Options for the user
        txtStory.Text = "After a heavy night in town, you wake up the following day with the worst headache ever. The night seems to be a blur. The usual business of outside seems to be quiter than normal, even for a Sunday, but you don't think too much about it." + Environment.NewLine + " After you have had a shower, a coffee and got ready you feel slightly better, you turn on the TV to watch your favorite channel, only to see some pandemic on the news, apparently a ZOMBIE OUTBREAK!" + Environment.NewLine + "Luckily for you though, you have played Black Ops Zombies and Minecraft for most of your student life so you know exactly what to do..."
            + Environment.NewLine + "" + Environment.NewLine + "Option 1: Run outside and ask the first person you see to help you" + Environment.NewLine + "" + Environment.NewLine + "Option 2: Take some time to get some food and money together and pack them along with extra clothes into your bag." + Environment.NewLine + "" + Environment.NewLine + "Option 3: Text your friends and see if they are okay." + Environment.NewLine + "" + Environment.NewLine + "Option 4: Call the police to let them know a Zombie Outbreak is happening";
        btnStart.Visible = false;

            txtChoice.Text = Convert.ToString(iChoice);
            iChoice = Convert.ToInt32(Console.ReadLine());
            if  (iChoice == 1)
            {
                    txtResult.Text = "You run outside and grab the first person you see by the shoulder, apparently this particular person just wanted to chomp on your flesh." + Environment.NewLine + "" + Environment.NewLine + "YOU DIED!!!";
                    iScore = -1;
                    lblScore.Text = iScore.ToString();
            }
    }
}
}

I hope someone can help. I'm pleased with the rest of it, just the if statement atm, it just wont detect an entry in the textbox, i was also thinking of using a submit answer button, but i have no idea how i would get that to work.

Just worth mentioning that i am not an advanced user (as you can probably tell)

Answer 1

As i see you are using windows forms with textBoxes and buttons, but then you are reading iChoice from console. if you have textBox for that variable (iChoice) then try this iChoice = Int32.Parse(iChoiceTextBox.Text);

change btnStart_click event this way:

private void btnStart_Click(object sender, EventArgs e)
    {

        //Displays story and Options for the user
        txtStory.Text = "After a heavy night in town, you wake up the following day with the worst headache ever. The night seems to be a blur. The usual business of outside seems to be quiter than normal, even for a Sunday, but you don't think too much about it." + Environment.NewLine + " After you have had a shower, a coffee and got ready you feel slightly better, you turn on the TV to watch your favorite channel, only to see some pandemic on the news, apparently a ZOMBIE OUTBREAK!" + Environment.NewLine + "Luckily for you though, you have played Black Ops Zombies and Minecraft for most of your student life so you know exactly what to do..."
            + Environment.NewLine + "" + Environment.NewLine + "Option 1: Run outside and ask the first person you see to help you" + Environment.NewLine + "" + Environment.NewLine + "Option 2: Take some time to get some food and money together and pack them along with extra clothes into your bag." + Environment.NewLine + "" + Environment.NewLine + "Option 3: Text your friends and see if they are okay." + Environment.NewLine + "" + Environment.NewLine + "Option 4: Call the police to let them know a Zombie Outbreak is happening";
        btnStart.Visible = false;

        iChoice = Int32.Parse(txtChoice.Text);
        if (iChoice == 1)
        {
            txtResult.Text = "You run outside and grab the first person you see by the shoulder, apparently this particular person just wanted to chomp on your flesh." + Environment.NewLine + "" + Environment.NewLine + "YOU DIED!!!";
            iScore = -1;
            lblScore.Text = iScore.ToString();
        }
    }