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ASP TreeView Control

Hi

I am using ASP Tree View Control to display data in
hiearchy fashion.I am having a checkbox next to the
TreeView Node.When user checks or unchecks the nodes and
click a button i am putting that count in a
stringcollectio n which is in viewstate.The count is wrong
after certain checks and click of the button.can any one
explain what could be wrong.

Here is the code below.
nodeschecked count is going wrong what could be reason.

Private Sub Page_Load(ByVal sender As System.Object, ByVal
e As
System.EventArg s) Handles MyBase.Load
If Not IsPostBack Then
nodesChecked = New StringCollectio n()
ViewState("Sele cted") = nodesChecked
Else
nodesChecked = CType(ViewState ("Selected") ,
StringCollectio n)
End If
End Sub

Private Sub TreeView1_Check (ByVal sender As Object, ByVal
e As
Microsoft.Web.U I.WebControls.T reeViewClickEve ntArgs)
Handles TreeView1.Check
Dim treeView As TreeView
Dim node As TreeNode
Dim strNodeChecked As String

treeView = CType(sender, TreeView)
strNodeChecked = e.Node
node = treeView.GetNod eFromIndex(strN odeChecked)

' the node will have been checked or unchecked
If node.Checked = True Then
nodesChecked.Ad d(node.Text)
Else
nodesChecked.Re move(node.Text)
End If
End Sub
End Class
Thanks
Srinivasa Raghavan


Nov 17 '05 #1
2 2417
Srinivasa,

Your code looks fine except for one small thing: In your Sub
TreeView1_Check I don't see where you are saving the new nodesChecked object
to view state. If you don't re-save it to the view state variable every page
load the view state is re-setting it to the empty value.

Change your code to look like this and it will work I think:

' the node will have been checked or unchecked
If node.Checked = True Then
nodesChecked.Ad d(node.Text)
Else
nodesChecked.Re move(node.Text)
End If

ViewState("Sele cted") = nodesChecked
Sincerely,

--
S. Justin Gengo, MCP
Web Developer

Free code library at:
www.aboutfortunate.com

"Out of chaos comes order."
Nietzche
"Srinivasa Raghavan" <s_************ ******@hotmail. com> wrote in message
news:08******** *************** *****@phx.gbl.. .
Hi

I am using ASP Tree View Control to display data in
hiearchy fashion.I am having a checkbox next to the
TreeView Node.When user checks or unchecks the nodes and
click a button i am putting that count in a
stringcollectio n which is in viewstate.The count is wrong
after certain checks and click of the button.can any one
explain what could be wrong.

Here is the code below.
nodeschecked count is going wrong what could be reason.

Private Sub Page_Load(ByVal sender As System.Object, ByVal
e As
System.EventArg s) Handles MyBase.Load
If Not IsPostBack Then
nodesChecked = New StringCollectio n()
ViewState("Sele cted") = nodesChecked
Else
nodesChecked = CType(ViewState ("Selected") ,
StringCollectio n)
End If
End Sub

Private Sub TreeView1_Check (ByVal sender As Object, ByVal
e As
Microsoft.Web.U I.WebControls.T reeViewClickEve ntArgs)
Handles TreeView1.Check
Dim treeView As TreeView
Dim node As TreeNode
Dim strNodeChecked As String

treeView = CType(sender, TreeView)
strNodeChecked = e.Node
node = treeView.GetNod eFromIndex(strN odeChecked)

' the node will have been checked or unchecked
If node.Checked = True Then
nodesChecked.Ad d(node.Text)
Else
nodesChecked.Re move(node.Text)
End If
End Sub
End Class
Thanks
Srinivasa Raghavan

Nov 17 '05 #2
Hi
I am storing cookies in the client side using httpcookie object.It is
working in IE and not in netscape.please suggest a solution.
I am having javascript which works in IE and not in Netscape.Basica lly
when clicking checkbox in grid i call the javascript.In Netscape the i
am unable to deselected the checkbox once selected.

Thanks
Srinivasa Raghavan


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Nov 17 '05 #3

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