WindowsForm通过字符串名称实例化控件

private Control FindControl(Control control, string controlName)
        {
            Control c1;
            foreach (Control c in control.Controls)
            {
                if (c.Name == controlName)
                {
                    return c;
                }
                )
                {
                    c1 = FindControl(c, controlName);
                    if (c1 != null)
                    {
                        return c1;
                    }
                }
            }
            return null;
        }