How to handle a group of textbox/label in an array

Question

I have a serie of textboxes and labels form textbox 1-9 and label 1 to 9. With a click on a any label I clear the correspondant textbox.

I created a methode but it's like a baby toy comparison to my procedures in TP or VB. There must be a shortest well structered way. Any idea wiil be very much appreciated?

What I did :)))

    private void label1_Click(object sender, EventArgs e)
    {
        textBox1.Text = "" ;
    }
    private void label2_Click(object sender, EventArgs e)
    {
        textBox2.Text = "" ;
    }
    private void label3_Click(object sender, EventArgs e)
    {
        textBox3.Text = "" ;
    }
    private void label4_Click(object sender, EventArgs e)
    {
        textBox4.Text = "" ;
    }
    private void label5_Click(object sender, EventArgs e)
    {
        textBox5.Text = "" ;
    }
    private void label6_Click(object sender, EventArgs e)
    {
        textBox6.Text = "" ;
    }
    private void label7_Click(object sender, EventArgs e)
    {
        textBox7.Text = "" ;
    }
    private void label8_Click(object sender, EventArgs e)
    {
        textBox8.Text = "" ;
    }
    private void label9_Click(object sender, EventArgs e)
    {
        textBox9.Text = "" ;
    }

Answer 1

You can utilize Tag property to mark controls. Then you can iterate through them (preferably starting from most parent control - form and with the use of recursion! or, if you are sure, from the container, which holds the group of controls).

// assign tag "1" to "9" to labels and texboxes
// subscribe all labels to same event label_Click
private void label_Click(object sender, EventArgs e)
{
    string id = (sender as Control).Tag.ToString();
    // iterate or recurse
    FindTextboxWithId(id).Clear();
}
// it shouldn't be hard to write FindTextboxWithId

Other possibility is to create private arrays of controls, in the form constructor, just to ease referencing them.

public TextBox[] _textBox;

public Form1()
{
    InitializeComponent();
    _textBox = new TextBox[] {textBox1, texBox2, ..., textBox9};
}

// assign tag "0" to "8" to labels and texboxes
// subscribe all labels to same event label_Click
private void label_Click(object sender, EventArgs e)
{
    int index = int.Parse((sender as Label).Tag);
    _textBox[index].Clear();
}

Third possibility is to utilize containers, to example, TableLayoutPanel. You can create 2 column container where first column is Label's and second is TextBox'es. Then just fill 9 rows and have fun in OnClick (to find sender position, to find texbox position, to find textbox and to finally clear it).