Question

I have been working on this project for a few days, it’s a C# Windows Visual Studio 2010 form and I have been posting different questions that relate to the same project; as I was told to post different questions instead on having them all in the same post. So this is the project: create a form with two ListBoxes—one contains at least four font names and the other contains at least four font sizes. Let the first item in each list be the default selection if the user fails to make a selection. Allow only one selection per ListBox. After the user clicks a button, display “Hello” in the selected font and size.
This time I’m having a problem getting the message in the textbox to display according to the font type and size that the user selected. Here is where I’m at in the coding:

    public Form1()
    {
        InitializeComponent();

        //populate listbox1
        listBox1.Items.Add("Arial");
        listBox1.Items.Add("Calibri");
        listBox1.Items.Add("Times New Roman");
        listBox1.Items.Add("Verdana");

        //populate listbox2
        listBox2.Items.Add("8");
        listBox2.Items.Add("10");
        listBox2.Items.Add("12");
        listBox2.Items.Add("14");

        this.listBox1.SelectedIndexChanged += new System.EventHandler(this.listBox1_SelectedIndexChanged);
        listBox1.SelectedIndex = 0; // <--- set default selection for listBox1 

        this.listBox2.SelectedIndexChanged += new System.EventHandler(this.listBox2_SelectedIndexChanged);
        listBox2.SelectedIndex = 0; // <--- set default selection for listBox2

    }

    private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
    {

        textBox1.Text = listBox1.SelectedItem.ToString();
    }

    private void listBox2_SelectedIndexChanged(object sender, EventArgs e)
    {
        textBox1.Text = listBox2.SelectedItem.ToString();
    }

    private void textBox1_TextChanged(object sender, EventArgs e)
    {
        textBox1.Text = "Hello!"; 
    }

    private void button1_Click(object sender, EventArgs e)
    {

    }
}

}

Now I’m trying to elicit a call from a button clicked that will display the message “Hello” in the user’s choice of font and font size. Any suggestions would be greatly appreciated.

Answer 1

remove this method:

 private void textBox1_TextChanged(object sender, EventArgs e)
{
    textBox1.Text = "Hello!"; 
}

in the button_click event of your button, add this :

  private void button1_Click(object sender, EventArgs e)
    {
    textBox1.Text = "hello";       
    textBox1.Font = new Font(listBox1.SelectedItem.ToString(), Convert.ToInt32(listBox2.SelectedItem.ToString()));  
    }

you might want to remove the selectedindexchanged methods in your code if you are going to use a button tho. depends on what you want.

edit:

 public Form2()
    {
        InitializeComponent();
        listBox1.Items.Add("Arial");
        listBox1.Items.Add("Calibri");
        listBox1.Items.Add("Times New Roman");
        listBox1.Items.Add("Verdana");

        listBox2.Items.Add("8");
        listBox2.Items.Add("10");
        listBox2.Items.Add("12");
        listBox2.Items.Add("14");
        listBox1.SelectedIndex = 0;
        listBox2.SelectedIndex = 0;
    }

    private void button1_Click(object sender, EventArgs e)
    {
    textBox1.Text = "hello";       
    textBox1.Font = new Font(listBox1.SelectedItem.ToString(), Convert.ToInt32(listBox2.SelectedItem.ToString()));  
    }

if you just use the above code everything should work as you want it to. I tried it out myself and it’s working fine for me