Text box in focus when program starts

Question

How can I set my text box "Fahrenheit" in focus when the program starts that I don't have to click it manually? Because the program has only 1 function and it would be more comfortable.

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

    private void label2_Click(object sender, EventArgs e)
    {
    }

    private void textBox1_TextChanged(object sender, EventArgs e)
    {
      this.ActiveControl = textBox1;

      double Fahrenheit = Convert.ToDouble(textBox1.Text);
      double Celsius = (Fahrenheit - 32) * 5.0 / 9.0;

      textBox2.Text = Celsius.ToString("F");
    }

    private void Form1_Load(object sender, EventArgs e)
    {

    }
  }
}

you just set TabIndex=0 to that textbox you want to focus to when program start — jLaw, Oct 26 '15 at 14:24

Salah Akbari · Accepted Answer · 2015-10-26T14:22:20.030

3

the line this.ActiveControl = textBox1; should be below the InitializeComponent(); Like this:

public Form1()
{
  InitializeComponent();
  this.ActiveControl = textBox1;
}

edited Oct 26 '15 at 14:22

answered Oct 26 '15 at 14:19

Salah Akbari

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i think its better to put `this.ActiveControl = textBox1;` in form `shown` event. i havent tested yours but some times some options may not work here because form is not completely loaded. – M.kazem Akhgary Oct 26 '15 at 14:21
Thank you. It worked. The main problem was that I didn't know where to put it. – user5462581 Oct 26 '15 at 14:22
The answer from jLaw also worked --> set "TabIndex=0" – user5462581 Oct 26 '15 at 14:43

Text box in focus when program starts

1 Answers1