How to remove dynamic control from Form

Question

I have 2 problems related to dynamic control.

1)
I hava a array txt to cteate no. of dynamic textbox at run time, i does this successfully.I want remove previously created textbox and add new textboxes to form on button click.

private void button1_Click(object sender, EventArgs e)
{
//txt.Controls.Remove();
//txt[n].Controls.Clear();
n=Convert.ToInt16(textBox1.Text);
txt = new TextBox[n];
for (int i = 0; i < n; i++)
{

txt[i] = new TextBox();
this.Controls.Add(txt[i]);
txt[i].Location = new Point(textBox1.Location.X, textBox1.Location.Y + (i + 1) * 40);
txt[i].BackColor = Color.FromArgb(r.Next(255), r.Next(255), r.Next(255));
txt[i].Text = "This is Dynamic TextBox" + (i + 1);
txt[i].Size = new Size(150, 10);

}
}

-----------------------------------------------------------------------
2)
how to use textbox.text property with dynamic textbox to use text of textbox.
for ex. i want display a messegebox with text of dynamic textbox.

Vulpes · Answer

If you give the dynamic textboxes similar names then it will make them easier to remove later. Try this (off top of my head so may not be quite right): private void button1_Click(object sender EventArgs e) { // remove existing dynamic textboxes for(int i = this.Controls.Count - 1; i >= 0; i--) { Control c = this.Controls[i]; if (c is TextBox && c.Name.StartsWith(txtDynamic)) { this.Controls.RemoveAt(i); c = null; } } n = Convert.ToInt32(textBox1.Text); txt = new TextBox[n]; for (int i = 0; i { txt[i] = new TextBox(); txt[i].Name = txtDynamic + (i + 1).ToString(); this.Controls.Add(txt[i]); txt[i].Location = new Point(textBox1.Location.X textBox1.Location.Y + (i + 1) * 40); txt[i].BackColor = Color.FromArgb(r.Next(255) r.Next(255) r.Next(255)); txt[i].Text = This is Dynamic TextBox + (i + 1); txt[i].Size = new Size(150 10); } } Just use txt[i].Text to display the text contained in the (i + i)th textbox: // show text in first textbox MessageBox.Show(The first textbox contains  + txt[0].Text);