有点麻烦的问题

Question

我想实现这样一功能，当在textbox里按下ENTER键时，就执行BUTTON1_CLICK事件，我的代码如下，但结果并不理想，第一次按ENTER键时，并未执行BUTTON1_CLICK事件，再按一次才执行,代码如下，请高手指点,或者有其他更好的办法？        private void button1_Click(object sender, EventArgs e)
        {
            textBox1.Text = "你按下ENTER键。";
            this.textBox1.KeyDown -= new System.Windows.Forms.KeyEventHandler(this.button1_Click);
        }
        private void textBox1_KeyDown(object obj, System.Windows.Forms.KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Enter)
            {
                this.textBox1.KeyDown += new System.Windows.Forms.KeyEventHandler(this.button1_Click);
            }
        }

Answer 1

private void button1_Click(object sender, EventArgs e)
        {
            textBox1.Text = "你按下ENTER键。";
            this.textBox1.KeyDown -= new System.Windows.Forms.KeyEventHandler(this.button1_Click);
        }
        private void textBox1_KeyDown(object obj, System.Windows.Forms.KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Enter)
            {
                this.button1_Click(sender ,e);            
}
        }

Answer 2

private void button1_Click(object sender, EventArgs e)
{
    this.textBox1.Text = "你按下ENTER键。";
}private void textBox1_KeyDown(object obj, System.Windows.Forms.KeyEventArgs e)
{
    if (e.KeyCode == Keys.Enter)
        this.button1_Click(sender ,e);
}

Answer 3

private void textBox1_KeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e)
{
if(e.KeyChar.Equals((char)13))
{
//your work code here
} }