pull down combobpx

[Ivan V via DotNetMonster.com]

Hi All:

How can I activate the spacebar to pull down the combobox?

For instance, once the tab stopped at the combobox, suppose i can use dnarrow
or F4 to pull down the combobox to make selection, but instead of these 2
keys, I want to use spacebar, can I do that?

Best rgds,
Ivan Vong


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[Herfried K. Wagner [MVP]]

Re: pull down combobpx

"Ivan V via DotNetMonster.c om" <forum@DotNetMo nster.com> schrieb:[color=blue]
> How can I activate the spacebar to pull down the combobox?[/color]

Set the control's 'DroppedDown' property to 'True'.

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M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://classicvb.org/petition/>

[Patrick Steele [MVP]]

Re: pull down combobpx

In article <52E24AD468808@ DotNetMonster.c om>, forum@DotNetMon ster.com
says...[color=blue]
> Hi All:
>
> How can I activate the spacebar to pull down the combobox?
>
> For instance, once the tab stopped at the combobox, suppose i can use dnarrow
> or F4 to pull down the combobox to make selection, but instead of these 2
> keys, I want to use spacebar, can I do that?[/color]

I would subclass the regular combobox and handle the OnKeyDown method:

Public Class MyComboBox
Inherits ComboBox

' abstract method. just call base class method
Protected Overrides Sub RefreshItem(ByV al index As Integer)
MyBase.RefreshI tem(index)
End Sub

' abstract method. just call base class method
Protected Overrides Sub SetItemsCore(By Val items As
System.Collecti ons.IList)
MyBase.SetItems Core(items)
End Sub

Protected Overrides Sub OnKeyDown(ByVal e As KeyEventArgs)
If e.KeyCode = Keys.Space Then
Me.DroppedDown = Not Me.DroppedDown
e.Handled = True
End If
End Sub
End Class

All this does is that when the space key is pressed, it will toggle the
dropdown to either on or off.

--
Patrick Steele
Microsoft .NET MVP

http://weblogs.asp.net/psteele

[Ivan V via DotNetMonster.com]

Re: pull down combobpx

i did try, but it's not working!!!


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[Ivan V via DotNetMonster.com]

Re: pull down combobpx

both method is not working!


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[Patrick Steele [MVP]]

Re: pull down combobpx

In article <52E289E2A588C@ DotNetMonster.c om>, forum@DotNetMon ster.com
says...[color=blue]
> both method is not working![/color]

The code was copied directly out of a working project. Could you give
more detail as to what "is not working" means? Are you getting errors?
Can you provide some sample code?

This is a winform app, correct?

--
Patrick Steele
Microsoft .NET MVP

http://weblogs.asp.net/psteele

[Ivan V via DotNetMonster.com]

Re: pull down combobpx

Yes, it's a vb.net application. I just simply add the code that you provided
to me. My comob box named Type, and nothing had changed when the code has
been added!!!


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[Patrick Steele [MVP]]

Re: pull down combobpx

In article <52E2BBFD60F14@ DotNetMonster.c om>, forum@DotNetMon ster.com
says...[color=blue]
> Yes, it's a vb.net application. I just simply add the code that you provided
> to me. My comob box named Type, and nothing had changed when the code has
> been added!!![/color]

You also need to change the VS.NET generated code. Right now it's
creating a standard System.Windows. Forms.ComboBox. You'd need to change
that to "MyComboBox " (if you use the sample code I provided).

--
Patrick Steele
Microsoft .NET MVP

http://weblogs.asp.net/psteele

[Ivan V via DotNetMonster.com]

Re: pull down combobpx

Thanks Patrick, it works great for me now. How about to activate the up arrow
and down arrow in our keyboard in a window from as the function of tab key?


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[Patrick Steele [MVP]]

Re: pull down combobpx

In article <52E2DCA2AA9DC@ DotNetMonster.c om>, forum@DotNetMon ster.com
says...[color=blue]
> Thanks Patrick, it works great for me now. How about to activate the up arrow
> and down arrow in our keyboard in a window from as the function of tab key?[/color]

I'm not sure what you're asking. Do you want the up/down arrow keys to
allow you to move focus around the form like TAB and SHIFT+TAB? Or do
you want the TAB and SHIFT+TAB keys to act like the up/down arrow keys?

--
Patrick Steele
Microsoft .NET MVP

http://weblogs.asp.net/psteele

[Ivan V via DotNetMonster.com]

Re: pull down combobpx

It's the former one which the up/down arrow keys allow me to move focus
around like the TAB and SHIFT + TAB.
Thanks for your attention!


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