first program in c#

I am trying to pick up c# and was wondering if someone could show me what I am doing wrong. In the code below I have three radio buttons(go, slow down, and stop). I also have a checkbox is show the results of what the car is doing when each radio button is checked. When I run the program there is nothing in the textbox and just wanting to see if someone can take a quick look and what is wrong...

Code:

---


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 Making_Decisions_Winforms1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        void DoTrafficLight(string color)
        {
            switch (color)
            {
                case "green":
                    textBox1.Text = "The car is moving!";
                    //tmrYellow.Enabled = true;
                    break;
                case "yellow":
                    textBox1.Text = "The car is slowing down!";
                    tmrYellow.Enabled = true;
                    break;
                case "red":
                    textBox1.Text = "The car has stopped!";
                    tmrYellow.Enabled = false;
                    break;
            }
        }

        private void greenRadioButton1_CheckedChanged(object sender, EventArgs e)
        {
            if (greenRadioButton1.Checked == true)
            {
                DoTrafficLight("green");
               
            }
        }

        private void yellowRadioButton1_CheckedChanged(object sender, EventArgs e)
        {
            if (yellowRadioButton1.Checked == true)
            {
                DoTrafficLight("yellow");
            }

        }

        private void redRadioButton1_CheckedChanged(object sender, EventArgs e)
        {
            if (redRadioButton1.Checked == true)
            {
                DoTrafficLight("red");
            }
        }

    }
}

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This will probably not completely solve your problem, but notice that clicking a RadioButton will fire not one but two of those CheckedChanged events. You need to have one _CheckedChanged assigned to all three, with all three of the if (x.Checked) snippets in the one event handler.

So what I am seeing here is that whichever radio button is check the textBox1 will display the strings you have defined. You should be seeing that text. Now, I do not see anything about a checkbox you mentioned to show results? I threw something together real quick that should work very similar to yours:

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;

namespace TestTraffic
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void RadioBtn_CheckedChanged(object sender, EventArgs e)
        {
            if (greenRadioBtn.Checked)
                DoTrafficLight("green");
            if (yellowRadioBtn.Checked)
                DoTrafficLight("yellow");
            if (redRadioBtn.Checked)
                DoTrafficLight("red");
        }

        void DoTrafficLight(string color)
        {
            switch (color)
            {
                case "green":
                    if (chkBox1.Checked) //Show "car status" check box
                        textBox1.Text = "The car is moving!";
                    //tmrYellow.Enabled = true;
                    break;
                case "yellow":
                    if (chkBox1.Checked)
                        textBox1.Text = "The car is slowing down!";
                    //tmrYellow.Enabled = true;
                    break;
                case "red":
                    if (chkBox1.Checked)
                        textBox1.Text = "The car has stopped!";
                    //tmrYellow.Enabled = false;
                    break;
            }
        }

        private void chkBox1_CheckedChanged(object sender, EventArgs e)
        {
            if (!chkBox1.Checked)
                textBox1.Clear();
            else
            {               
                //Show status of car with current radio button that is already checked when open program
            }
        }

        private void Form1_Load(object sender, EventArgs e)
        {         
        }
    }
}

---

Also what Zips mentioned is correct, you only need one _CheckChanged assigned to all three. But the form automatically generates a new one for every radio button you double click. That will work but creates code that is not necessarily needed.

I apologize I actually made a typo in my first post. There is not a checkbox in my program. Under the form layout, I just have a groupbox with 3 radio buttons in it (green, yellow, and red). I also have a textbox that should show the results so no checkbox is used.