private void Form2_Load(object sender, EventArgs e)

        {

            foreach (Control c in this.Controls) //获取页面中的所有控件

            {

                if (c.GetType().ToString() == "System.Windows.Forms.TextBox")//如果是TextBox控件，则添加事件

                {

                    TextBox tb1=c as TextBox;

                    c.KeyDown += new KeyEventHandler(Key_Down);

                }

            }

        }

 

        private void Key_Down(object sender, KeyEventArgs e)

        {

            if (e.KeyCode == Keys.Enter)

            {

                //this.SelectNextControl(this.ActiveControl,true, true, true, true);

                SendKeys.Send("{Tab}");  //向活动应用程序发送击键 注意格式：Send("{Tab}");中的{}

            }

        }