I've used AddHandler for a UNIQUE control added to a panel and it
seemed to work. But now I want to add a bunch of controls to a panel
and use only one event handler subroutine. And I am completely lost.
Below is the essence of the code adding checkbox controls to a panel.
(Corresponding to each checkbox is another checkbox and a label.)
Do I have to use AddHandler in the loop? Or is there someway outside
of a loop to say that a particular sub is the event handler for all
controls in an array of controls? The syntax of my AddHandler is
wrong but I cannot figure out how to fix it.
I have to be able to figure out in the event handler code WHICH
checkbox was checked. So I'd like to get the index value of the
control passed as an argument to the event handler sub. But that's
another thing which I can't figure out.
When I pnlAttrs.Controls.Clear() will that undo the AddHandler or must
I use RemoveEventHandler? And what would the syntax of the
RemoveEventHandler be?
Here's the code ...
For i As Integer = 0 To x
chkbxSel(i) = New CheckBox
pnlAttrs.Controls.Add(chkbxSel(i))
AddHandler chkbxSel(i).Click, AddressOf chkbxSelI_Click '< ??
Next
Private Sub chkbxSelI_Click(ByVal i As Integer)
MsgBox("bingo for number " & i.ToString)
End Sub
Any and all help will be appreciated.
Thanks, Bob 5 1553
See Answers below..
"eBob.com" <eB******@totallyfakeisp.com> wrote in message
news:tj********************************@4ax.com...
I've used AddHandler for a UNIQUE control added to a panel and it seemed to work. But now I want to add a bunch of controls to a panel and use only one event handler subroutine. And I am completely lost.
- Yes you can use one routinue.. it will work, you say Addressof
Routine1_Click and attach it to all CheckBox's click event.. Below is the essence of the code adding checkbox controls to a panel. (Corresponding to each checkbox is another checkbox and a label.)
Do I have to use AddHandler in the loop? Or is there someway outside of a loop to say that a particular sub is the event handler for all controls in an array of controls? The syntax of my AddHandler is wrong but I cannot figure out how to fix it.
- You can have it in the Loop.. perfectly ok.. , regarding your syntax i am
not sure why you are using array's.. the below do the trick
For i As Integer = 0 To x
chkbxSel = New CheckBox
pnlAttrs.Controls.Add(chkbxSel)
AddHandler chkbxSel(i).Click, AddressOf chkbxSelI_Click
Next
Private Sub chkbxSelI_Click(ByVal sender As Object, ByVal e As EventArgs)
MsgBox("bingo for number " & i.ToString)
End Sub I have to be able to figure out in the event handler code WHICH checkbox was checked. So I'd like to get the index value of the control passed as an argument to the event handler sub. But that's another thing which I can't figure out.
Private Sub chkbxSelI_Click(ByVal sender As Object, ByVal e As EventArgs)
MsgBox("bingo for number " & i.ToString)
CheckBox chk1 = Ctype(sender,Checkbox)
'Chk1 will give you the CheckBox that was clicked.. you can use the
name to identify the box, or something in
'Check box tag to identify the box... I would prefer using name
End Sub When I pnlAttrs.Controls.Clear() will that undo the AddHandler or must I use RemoveEventHandler? And what would the syntax of the RemoveEventHandler be?
- Yes... u don't need to use RemoveHandler. Here's the code ...
For i As Integer = 0 To x chkbxSel(i) = New CheckBox pnlAttrs.Controls.Add(chkbxSel(i)) AddHandler chkbxSel(i).Click, AddressOf chkbxSelI_Click '< ?? Next
Private Sub chkbxSelI_Click(ByVal i As Integer) MsgBox("bingo for number " & i.ToString) End Sub
Any and all help will be appreciated.
Thanks, Bob
VJ, - You can have it in the Loop.. perfectly ok.. , regarding your syntax i am not sure why you are using array's.. the below do the trick
Was my thought as well, however I was first looking at your sample and than
saw this text. For i As Integer = 0 To x chkbxSel = New CheckBox pnlAttrs.Controls.Add(chkbxSel) AddHandler chkbxSel(i).Click, AddressOf chkbxSelI_Click Next
AddHandler chkbxSel.Click, AddressOf chkbxSelI_Click
I assume just a typo, however to make it not to difficult for the OP.
Cor
EBob,
See bellow For i As Integer = 0 To x chkbxSel(i) = New CheckBox pnlAttrs.Controls.Add(chkbxSel(i)) AddHandler chkbxSel(i).Click, AddressOf chkbxSelI_Click '< ?? Next
Private Sub chkbxSelI_Click(ByVal i As Integer) MsgBox("bingo for number " & i.ToString) End Sub
I think that this will only go when it would be
For i As Integer = 0 To x
chkbxSel = New UNIQUEControl
pnlAttrs.Controls.Add(chkbxSel)
AddHandler chkbxSel.Click, AddressOf chkbxSelI_Click
Next
The original CheckBox has other parameters in his Click Event than your
UNIQUEControl so what you are doing now will not be accepted.
(You can use the array of course as well when you want afterwards use that
to set the properties of those checkboxes, however you can set those much
nicer in this loop and than you do not need the array as VJ already wrote.)
I hope this give the idea?
Cor
Yea thanks.. that was typo... And you have a good point, thanks I will keep
a note of it.
VJ
"Cor Ligthert" <no************@planet.nl> wrote in message
news:Oz**************@TK2MSFTNGP09.phx.gbl... VJ,
- You can have it in the Loop.. perfectly ok.. , regarding your syntax i am not sure why you are using array's.. the below do the trick
Was my thought as well, however I was first looking at your sample and than saw this text. For i As Integer = 0 To x chkbxSel = New CheckBox pnlAttrs.Controls.Add(chkbxSel) AddHandler chkbxSel(i).Click, AddressOf chkbxSelI_Click Next
AddHandler chkbxSel.Click, AddressOf chkbxSelI_Click
I assume just a typo, however to make it not to difficult for the OP.
Cor
Gentlemen,
Thank you for your help.
Bob
On Wed, 16 Mar 2005 21:47:10 -0600, "VJ" <vi********@yahoo.com> wrote: See Answers below..
"eBob.com" <eB******@totallyfakeisp.com> wrote in message news:tj********************************@4ax.com.. .
I've used AddHandler for a UNIQUE control added to a panel and it seemed to work. But now I want to add a bunch of controls to a panel and use only one event handler subroutine. And I am completely lost.
- Yes you can use one routinue.. it will work, you say Addressof Routine1_Click and attach it to all CheckBox's click event..
Below is the essence of the code adding checkbox controls to a panel. (Corresponding to each checkbox is another checkbox and a label.)
Do I have to use AddHandler in the loop? Or is there someway outside of a loop to say that a particular sub is the event handler for all controls in an array of controls? The syntax of my AddHandler is wrong but I cannot figure out how to fix it.
- You can have it in the Loop.. perfectly ok.. , regarding your syntax i am not sure why you are using array's.. the below do the trick
For i As Integer = 0 To x chkbxSel = New CheckBox pnlAttrs.Controls.Add(chkbxSel) AddHandler chkbxSel(i).Click, AddressOf chkbxSelI_Click Next
Private Sub chkbxSelI_Click(ByVal sender As Object, ByVal e As EventArgs) MsgBox("bingo for number " & i.ToString) End Sub
I have to be able to figure out in the event handler code WHICH checkbox was checked. So I'd like to get the index value of the control passed as an argument to the event handler sub. But that's another thing which I can't figure out.
Private Sub chkbxSelI_Click(ByVal sender As Object, ByVal e As EventArgs) MsgBox("bingo for number " & i.ToString) CheckBox chk1 = Ctype(sender,Checkbox) 'Chk1 will give you the CheckBox that was clicked.. you can use the name to identify the box, or something in 'Check box tag to identify the box... I would prefer using name End Sub
When I pnlAttrs.Controls.Clear() will that undo the AddHandler or must I use RemoveEventHandler? And what would the syntax of the RemoveEventHandler be?
- Yes... u don't need to use RemoveHandler.
Here's the code ...
For i As Integer = 0 To x chkbxSel(i) = New CheckBox pnlAttrs.Controls.Add(chkbxSel(i)) AddHandler chkbxSel(i).Click, AddressOf chkbxSelI_Click '< ?? Next
Private Sub chkbxSelI_Click(ByVal i As Integer) MsgBox("bingo for number " & i.ToString) End Sub
Any and all help will be appreciated.
Thanks, Bob
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