如何防止DateTimePicker值更改事件从文本框离开事件

Question

In my C# Windows form have one textbox and one datatimePicker.This textbox has Leave Event and when textbox leave event occured,I want to fill value in datetimepicker. This datetimepicker also has ValueChanged Event. Now my problem is when fill value in datetimepicker from textbox leave event,same time datetimepicker ValueChanged Event also occured. So textbox leave event occur again. In this problem, I don't want to occur datetimepicker Valuechanged Event from textbox Leave Event. This is sample for my code.

private void textbox_Leave(object sender, EventArgs e) 
{ 
      datetimepicker.Value = System.DateTime.Now.ToString("dd/MM/yyyy").Substring(0, 10); 
} 

private void datetimepicker_ValueChanged(object sender, EventArgs e) 
{ 
      //do something 
} 

Thanks for help. Sorry for my English.

Answer 1

You may use

• or a boolean variable, that indicates that the value to DateTimePicker is set from outside , and if appears its ValueChangedEvent , just don't care.

   //PSEUDO CODE bool setDateFromOutside = false; //GLOBAL VARIABLE public void TextBox_Leave(...){ setDateFromOutside = true; //SET TRUE dateTimePicker.Value = newDate; //SOME VALUE setDateFromOutside = false; //SET TRUE } public void DateTimePicker_ValueChanged(...){ if(setDateFromOutside) return; } 

• or before setting the value to DateTimePicker unsubscribe from its ValueChangedEvent , and subscribe again after.

Answer 2

Now I resolve my problem by this.

private void textbox_Leave(object sender, EventArgs e) 
{ 
      datetimepicker.ValueChanged -= datetimepicker_ValueChanged;
      datetimepicker.Value = System.DateTime.Now.ToString("dd/MM/yyyy").Substring(0, 10);
      datetimepicker.ValueChanged += datetimepicker_ValueChanged; 
} 

private void datetimepicker_ValueChanged(object sender, EventArgs e) 
{ 
      //do something 
}