Tree view node selection error

[Adam Honek]

Hi,

I have the code below that I'm using in a tree view to detect what node the
user has clicked on.

It compiles but on runtime I get a type cast error.

I've used this method for both the tool bar and menu and it works fine
extending the "handles" property inherent within .net.

Isn't the type supposed to be "TreeNode"?



Private Sub tvSelectFolder_ NodeMouseClick( ByVal sender As Object, ByVal e As
System.Windows. Forms.TreeNodeM ouseClickEventA rgs) Handles
tvSelectFolder. NodeMouseClick

'Declare an object of type TreeNode

Dim pTreeViewNode As TreeNode

'Now let's find out which tree view node was clicked

pTreeViewNode = CType(sender, TreeNode)



'Each item corresponds to a different feature

Select Case pTreeViewNode.N ame

'//Exit the program

Case "InboxNode"

End Select

End Sub

End Class



Thanks,

Adam

[Cor Ligthert [MVP]]

Re: Tree view node selection error

Adam,

Did you set (as would be done as first if you have a casting problem) set in
top of your program or in the options: Option Strict On

That helps mostly to find casting errors.

Cor

"Adam Honek" <AdamHonek@Webm aster2001.frees erve.co.uk> schreef in bericht
news:%23X%23pLh PXGHA.3800@TK2M SFTNGP03.phx.gb l...[color=blue]
> Hi,
>
> I have the code below that I'm using in a tree view to detect what node
> the user has clicked on.
>
> It compiles but on runtime I get a type cast error.
>
> I've used this method for both the tool bar and menu and it works fine
> extending the "handles" property inherent within .net.
>
> Isn't the type supposed to be "TreeNode"?
>
>
>
> Private Sub tvSelectFolder_ NodeMouseClick( ByVal sender As Object, ByVal e
> As System.Windows. Forms.TreeNodeM ouseClickEventA rgs) Handles
> tvSelectFolder. NodeMouseClick
>
> 'Declare an object of type TreeNode
>
> Dim pTreeViewNode As TreeNode
>
> 'Now let's find out which tree view node was clicked
>
> pTreeViewNode = CType(sender, TreeNode)
>
>
>
> 'Each item corresponds to a different feature
>
> Select Case pTreeViewNode.N ame
>
> '//Exit the program
>
> Case "InboxNode"
>
> End Select
>
> End Sub
>
> End Class
>
>
>
> Thanks,
>
> Adam
>
>[/color]

[Claes Bergefall]

Re: Tree view node selection error

I would guess that the sender argument is actually the TreeView itself
Use e.Node to get the clicked node

/claes

"Adam Honek" <AdamHonek@Webm aster2001.frees erve.co.uk> wrote in message
news:%23X%23pLh PXGHA.3800@TK2M SFTNGP03.phx.gb l...[color=blue]
> Hi,
>
> I have the code below that I'm using in a tree view to detect what node
> the user has clicked on.
>
> It compiles but on runtime I get a type cast error.
>
> I've used this method for both the tool bar and menu and it works fine
> extending the "handles" property inherent within .net.
>
> Isn't the type supposed to be "TreeNode"?
>
>
>
> Private Sub tvSelectFolder_ NodeMouseClick( ByVal sender As Object, ByVal e
> As System.Windows. Forms.TreeNodeM ouseClickEventA rgs) Handles
> tvSelectFolder. NodeMouseClick
>
> 'Declare an object of type TreeNode
>
> Dim pTreeViewNode As TreeNode
>
> 'Now let's find out which tree view node was clicked
>
> pTreeViewNode = CType(sender, TreeNode)
>
>
>
> 'Each item corresponds to a different feature
>
> Select Case pTreeViewNode.N ame
>
> '//Exit the program
>
> Case "InboxNode"
>
> End Select
>
> End Sub
>
> End Class
>
>
>
> Thanks,
>
> Adam
>
>[/color]

[Adam Honek]

Re: Tree view node selection error

Thanks, this does the trick using the "e" argument.

BTW, Option Strict was off.

Adam

"Claes Bergefall" <louplou@nospam .nospam> wrote in message
news:ODsVvyWXGH A.4976@TK2MSFTN GP03.phx.gbl...[color=blue]
>I would guess that the sender argument is actually the TreeView itself
> Use e.Node to get the clicked node
>
> /claes
>
> "Adam Honek" <AdamHonek@Webm aster2001.frees erve.co.uk> wrote in message
> news:%23X%23pLh PXGHA.3800@TK2M SFTNGP03.phx.gb l...[color=green]
>> Hi,
>>
>> I have the code below that I'm using in a tree view to detect what node
>> the user has clicked on.
>>
>> It compiles but on runtime I get a type cast error.
>>
>> I've used this method for both the tool bar and menu and it works fine
>> extending the "handles" property inherent within .net.
>>
>> Isn't the type supposed to be "TreeNode"?
>>
>>
>>
>> Private Sub tvSelectFolder_ NodeMouseClick( ByVal sender As Object, ByVal e
>> As System.Windows. Forms.TreeNodeM ouseClickEventA rgs) Handles
>> tvSelectFolder. NodeMouseClick
>>
>> 'Declare an object of type TreeNode
>>
>> Dim pTreeViewNode As TreeNode
>>
>> 'Now let's find out which tree view node was clicked
>>
>> pTreeViewNode = CType(sender, TreeNode)
>>
>>
>>
>> 'Each item corresponds to a different feature
>>
>> Select Case pTreeViewNode.N ame
>>
>> '//Exit the program
>>
>> Case "InboxNode"
>>
>> End Select
>>
>> End Sub
>>
>> End Class
>>
>>
>>
>> Thanks,
>>
>> Adam
>>
>>[/color]
>
>[/color]