what I can do to execute Button.KeyPress event in vb ?
for example
Button.Click , should I press the button , so what about Button.KeyPress
Assuming you're talking about Runtime, in order to get the KeyPress event to fire, the Button needs to be first be selected, then press a (keyboard) button.
The KeyPress is normally used for things like a Textbox, it's not normally used with a Button
If you are looking for a way to force the Button.Click event, you can always call Me.Button1.PerformClick()
Related
Currently the v-select change event will fires multiple times during user typing keywords.
Is there any event will be only fired if user has select an option or press Enter to select an option.
I don't want the change event be fired during user typing keywords.
V-Select#Events
Unfortunately, it looks like the change event only has a parameter that is the value of selected option. There is not event passed through for you to check what actually raised the change event. However, looking at the link above, there are other events you can use.
There is a keydown event listed here that you might be able to leverage. It takes in a keyboard event, you should be able to check what keyboard event was raise i.e. 'Enter'. There are also other events such as mousedown or mouseup.
Using VB.net for a windows form application. I'm tired of always having to backspace the default '0' of a numeric updown control. What I would like to do is have the value selected automatically on enter, so that I can just type over it.
I've tried this:
Private Sub updown1_Enter(sender As Object, e As EventArgs) Handles updown1.Enter
Me.updown1.Select(0, updown1.Text.Length)
End Sub
I've used a break point to verify that it does indeed run, but it doesn't seem to do anything. What am I missing?
Your code is actually selecting the value as intended, it is just being undone by a mouse event almost instantaneously. When you click to enter a NumericUpDown, the events fire in the following order:
Enter
GotFocus
MouseDown
Click
MouseUp
As you probably know, in controls with text fields the native behavior places the cursor wherever you've clicked inside the textbox. This is what's causing your problem. You have selected the text at Enter, but then a bunch of mouse events come along and undo all your hard work. The obvious solution is to just use the MouseUp event since that's at the end of the list, but MouseUp will fire for anywhere you click inside the control so you'll have to decide if that behavior is acceptable for you.
I am working in windows form and have a few textboxes on a form.
These textboxes from top to bottom are connected, so if the text changes in textbox1, then txtbox2 and txtbox3 have to comply, if something changes in textbox2 then 3 has to comply;... and so on ... not going to bore you.
Now I was looking for an alternative, more efficient way of calling the textchanged event on the textboxes so it doesn't do everything everytime, even if one charater has changed....
Something like focus off textbox event ... or some other alternative .
This would be in vb.net and windows form.
You can use the TextBox.LostFocus event inherited from Control.LostFocus.
This event is fired when the control looses focus, like Tab or clicked on another control.
TextBox1.LostFocus perhaps? Or enable validation on the controls.
Control focus event order:
http://msdn.microsoft.com/en-gb/library/system.windows.forms.control.lostfocus.aspx
CausesValidation:
http://msdn.microsoft.com/en-gb/library/system.windows.forms.control.causesvalidation.aspx
I have a functionality regarding the double click of ListBox which already has SelectedIndexChanged event.The same events in vb6 works fine,but when it comes to single click the SelectedIndexChanged Event is firing always when I click for Double Click also.
I have tried to use timer and prevent the SelectedIndexChanged event,but no use always firing the SelectedIndexChanged event.
The event sequence in Vb is different when compared to VB.NET.
The ListBox have two Event to Handle the Double Click
DoubleClick Event
MouseDoubleClick Event
msdn: Control.DoubleClick Event
Example for DoubleClick Event with items: C# Listbox Item Double Click Event
You can't have both MouseDoubleClick and SelectedIndexChanged. When SelectedIndexChanged is used it supersedes MouseDoubleClick. Try using one or the other.
To be more exact, when the control is empty then MouseDoubleClick is fired but as soon as an item is added then SelectedIndexChanged fires and not MouseDoubleClick.
Hope this helps.
I have a text box and want to know if the data enter into is via pressing numeric keys or via a CTRL+V or via mouse right click.
Do not want to use windows message to process for paste/right click paste event.
You can use the KeyDown event to see whether Ctrl, then V was pressed (in two subsequent events).
You can use the MouseDown event to see whether the right mouse button was pressed.
You can use the KeyDown event to see if numeric keys were pressed.
If you use a flag for these three cases, then check it in the TextChanged event, you can determine where the text likely came from.