How to cancel DateTimePicker event? - 未名空间MITBBS历史存档

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How to cancel DateTimePicker event?

How to cancel DateTimePicker event?# DotNet - 窗口里的风景

c*t2007-01-26 08:01

1 楼

There are two dateTimePickers on a winform, which requires dt2 > dt1;
if dt1 is picked greater than dt2, reset dt1 to dt2-1; but the messagebox
pops
out twice. How to disable the second one? ..EnableEvents seems not working
//The code is as follows.
private void dateTimePicker2_ValueChanged(object sender, EventArgs e)
{
if (this.dateTimePicker1.Value > this.dateTimePicker2.Value)
{
MessageBox.Show("This date should NOT be earlier then " +
this.dateTimeP

k*i2007-01-26 08:01

2 楼

Per your description, the code should be changed as follows:
private void dateTimePicker2_ValueChanged(object sender, EventArgs e)
{
if (this.dateTimePicker1.Value > this.dateTimePicker2.Value)
{
MessageBox.Show("This date should NOT be earlier then " +
this.dateTimePicker1.Value.ToShortDateString() + "!");
this.Application.EnableEvents = false;
this.dateTimePicker1.Value = this.dateTimePicker2.Value.
AddDays(-1);

【在 c**t 的大作中提到】

: There are two dateTimePickers on a winform, which requires dt2 > dt1;
: if dt1 is picked greater than dt2, reset dt1 to dt2-1; but the messagebox
: pops
: out twice. How to disable the second one? ..EnableEvents seems not working
: //The code is as follows.
: private void dateTimePicker2_ValueChanged(object sender, EventArgs e)
: {
: if (this.dateTimePicker1.Value > this.dateTimePicker2.Value)
: {
: MessageBox.Show("This date should NOT be earlier then " +

c*t2007-01-26 08:01

3 楼

the messagebox is still called twice.
I tried both:
this.Application.EnableEvents = false;
this.dateTimePicker1.Value = this.dataTimePicker2.Value.AddDays(-1);
this.Application.EnableEvents = true;
and
Globals.ThisWorkbook.Application.EnableEvents = false;
..
Globals.ThisWorkbook.Applicaiton.EnableEvents = true;
Neither worked.

【在 k****i 的大作中提到】

: Per your description, the code should be changed as follows:
: private void dateTimePicker2_ValueChanged(object sender, EventArgs e)
: {
: if (this.dateTimePicker1.Value > this.dateTimePicker2.Value)
: {
: MessageBox.Show("This date should NOT be earlier then " +
: this.dateTimePicker1.Value.ToShortDateString() + "!");
: this.Application.EnableEvents = false;
: this.dateTimePicker1.Value = this.dateTimePicker2.Value.
: AddDays(-1);

c*t2007-01-26 08:01

4 楼

I used a static counter, and confirmed that the popup was called twice

【在 k****i 的大作中提到】

k*i2007-01-26 08:01

5 楼

Does the dateTimePicker1.Value change between these two calls?

【在 c**t 的大作中提到】

: I used a static counter, and confirmed that the popup was called twice

c*t2007-01-26 08:01

6 楼

obviously!

【在 k****i 的大作中提到】

: Does the dateTimePicker1.Value change between these two calls?

c*t2007-01-26 08:01

7 楼

found solution!
private void dateTimePicker1_ValueChanged(object sender, EventArgs e)
{
this.dateTimePicker1.MaxDate = this.dateTimePicker2.Value;
..
}
private void dateTimePicker2_ValueChanged(object sender, EventArgs e)
{
this.dateTimePicker2.MinDate = this.dateTimePicker1.Value;
..
}

working

【在 c**t 的大作中提到】