DateTimePicker控件 自定义加入ToolStripControl控件内，并在启动时，日期栏位为空

 #region [DateTimePicker控件加入ToolStripControl]
        /// <summary>
        /// 添加DateTimePicker方法
        /// </summary>
        /// <param name="n">传入需要添加的位置参数</param>
        private void AddDtPtoToolstrip(int n)
        {
            DateTimePicker dtp = new DateTimePicker
            {
                Width = 110,
                Format = DateTimePickerFormat.Custom,
                CustomFormat = " "　　//插入一个空格,防止一加载就带入当前时间
            };
            ToolStripControlHost host1 = new ToolStripControlHost(dtp);
            toolStrip1.Items.Insert(n, host1);
            dtp.ValueChanged += (sender, args) => dtp.CustomFormat = "yyyy-MM-dd";  //当点击日期时,插入自定义考试日期时间
        }
        #endregion