When dynamically creating textBoxes how can we make one of the textBoxes have the Focus() function on it?

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

        private void button1_Click(object sender, EventArgs e)
        {
            for (int i = 1; i <= 5; i  )
            {
                TextBox txt = new TextBox();
                Point txtKonum = new Point(300, i * 30);
                txt.Location = txtKonum;
                txt.Name = "TextBox"   i;
                txt.Text = i.ToString();
                this.Controls.Add(txt);
            }
        }
    }
}

Simply writing TextBox4.Focus() into the for loop is not working.

for (int i = 1; i <= 5; i  )
            {
                TextBox txt = new TextBox();
                Point txtKonum = new Point(300, i * 30);
                txt.Location = txtKonum;
                txt.Name = "TextBox"   i;
                txt.Text = i.ToString();
                if(i == 4)
                {
                    txt.Focus();
                }
                this.Controls.Add(txt);
            }

This code does not work either. enter image description here

As you can see in the picture there is no cursor on the 4th textBox.

CodePudding user response：

Solved, just put the this.Controls.Add(txt); code before the if statement,

            {
                TextBox txt = new TextBox();
                Point txtKonum = new Point(300, i * 30);
                txt.Location = txtKonum;
                txt.Name = "TextBox"   i;
                txt.Text = i.ToString();
                this.Controls.Add(txt);
                if(i == 4)
                {
                    txt.Focus();
                }

            } 

CodePudding user response：

Try giving control after the loop has completed:

private void button1_Click(object sender, EventArgs e)
{
    for (int i = 1; i <= 5; i  )
    {
        TextBox txt = new TextBox();
        Point txtKonum = new Point(300, i * 30);
        txt.Location = txtKonum;
        txt.Name = "TextBox"   i;
        txt.Text = i.ToString();
        this.Controls.Add(txt);
    }
    this.ActiveControl = this.TextBox4
}