datetimerpicker控件初始值为空的问题

在Load中，初始化
this.dateTimePicker1.Format=DateTimePickerFormat.Custom;
his.dateTimePicker1.CustomFormat=" ";
在事件里写：

private void dateTimePicker1_ValueChanged(object sender, System.EventArgs e)
{
this.dateTimePicker1.Format=DateTimePickerFormat.Long;
this.dateTimePicker1.CustomFormat=null;
}
这样datetimepicker初始值会为空，但是第一次选择日期值时，不像双击选中那样可以选中，必须移开鼠标之后才算选中，请问谁知道那个属性是什么呢？怎样才能让控件即可以初始化为空，而且运行选择日期时和原来一样。

5 个解决方案

#1

没人清楚吗

#2

有个showcheckBox属性,设checkbox=false

#3

        private void dateTimePicker1_ValueChanged(object sender, EventArgs e)

        {

            this.dateTimePicker1.Format = DateTimePickerFormat.Long;

            this.dateTimePicker1.CustomFormat = null;

            dateTimePicker1.Focus();

            SendKeys.Send("%{up}");

        }

#4



        private void Form1_Load(object sender, EventArgs e)

        {

            this.dateTimePicker1.Format = DateTimePickerFormat.Custom;

            this.dateTimePicker1.CustomFormat = "  ";

            //this.dateTimePicker1.;


        }


        private void dateTimePicker1_ValueChanged(object sender, EventArgs e)

        {

            

        }


        private void dateTimePicker1_Enter(object sender, EventArgs e)

        {

            this.dateTimePicker1.Format = DateTimePickerFormat.Long;


            this.dateTimePicker1.CustomFormat = null; 

        }

把改变属性的操作移动enter事件处理委托中

#5

4楼的方式需要点两次才能选中我要的日期

#1