Question

How to add a subcategory/object to a tree (Telerik RadTreeView)

Asked by: John500

Greetings,

The picture below demonstrates the goal of creating a subcategory called 'Notices' on the Telerik RadTreeView control.

My question: What do I need to do so that I have a new subcategory called 'Notices' for every project under 'Projects' ?

I have tried to follow the code to determine how subcategories are created for each project but I'm having some difficulty. I need help determining what code exactly populates this tree and then I need help adding an additional object.

Thanks!!

Expander-illustration.JPG
- 21 KB
Desired result in green

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Asked On: 2009-06-30 at 07:54:17ID24533447
Tags: ASP .Net
,; Telerik controls
Topic: Web Graphics Software
Participating Experts: 2
Points: 500
Comments: 24

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Answers

by: crittle1Posted on 2009-06-30 at 09:16:52ID: 24746825

I looked, I'm not able to help :( I'm so sorry

by: numberkruncherPosted on 2009-06-30 at 09:27:59ID: 24746939

How is the tree being generated?

Without any source it is very difficult to assist.

by: John500Posted on 2009-06-30 at 10:42:56ID: 24747608

>> How is the tree being generated

I was thinking I needed to place an object of some kind on the form first but I guess the objects are already placed and all I need to do is pull from the database to add additional nodes, yes/no?

How about the code below?

Load Tree Nodes
----------------
 
Protected Function KNavigator_LoadNode( _
         ByRef oDataSource As DataSet, _
         ByRef NodeParent As Telerik.Web.UI.RadTreeNode, _
         ByRef Parent_Id As Integer _
         ) As Boolean
        Try
            'Dim ie As IEnumerator = oDataSource.GetEnumerator
            'Dim e As Entity
            'ie.Reset()
            Dim t As DataTable
            t = oDataSource.Tables("Nodes")
            Dim strExpr As String
            Dim strSort As String
            strExpr = " entity_pid1 = " + Parent_Id.ToString
            ' Sort descending by column named CompanyName.
            strSort = "lexicontypeordinal,entityname "
            Dim foundRows() As DataRow
 
            foundRows = t.Select(strExpr, strSort)
 
            For Each dr As DataRow In foundRows
                Dim xNode As New Telerik.Web.UI.RadTreeNode
                'format node for given entity
                With xNode
                    .Attributes.Add("Entity_ID", dr.Item("Entity_ID").ToString)
                    .Attributes.Add("Tag", "eClass")
                    .Value = dr.Item("Entity_ID").ToString
                    .Text = dr.Item("EntityName").ToString
                    .ImageUrl = Navigator_GetImageURL(dr.Item("EntityType_Code").ToString)
                End With
                NodeParent.Nodes.Add(xNode)
                Dim ds As New DataSet
                Dim rc As nsRALPH_ENUM.DAL_ReturnCode = OK
                Dim htable As New Hashtable
                htable = CType(Session("ExpandedNode"), Hashtable)
                rc = dvl.View_SubFolders(CInt(dr.Item("Entity_ID")), ds)
                If htable IsNot Nothing Then
                    If ds.Tables(0).Rows.Count > 0 AndAlso Not htable.Contains(dr.Item("Entity_ID").ToString) Then _
                        xNode.ExpandMode = TreeNodeExpandMode.ServerSideCallBack
                    If htable.Contains(dr.Item("Entity_ID").ToString) Then
                        xNode.Expanded = True
                        xNode.ExpandMode = TreeNodeExpandMode.ServerSide
                    Else
                        xNode.Expanded = False
                    End If
 
                Else
                    If ds.Tables(0).Rows.Count > 0 Then
                        xNode.ExpandMode = TreeNodeExpandMode.ServerSideCallBack
                    End If
                End If
                _CurrentEntity = CType(Session("CurrentEntity"), Entity)
                If _CurrentEntity IsNot Nothing Then
                    If dr.Item("Entity_ID").ToString = _CurrentEntity.Entity_ID.ToString Then
                        xNode.Selected = True
                    End If
                End If
                KNavigator_LoadNode(oDataSource, xNode, CInt(dr.Item("Entity_ID").ToString))
            Next
 
            Return True
        Catch ex As Exception
            RaiseMessage(False, "Navigator_LoadNode(eZ) Exception Error: " & ex.Message)
            Return False
        End Try
    End Function

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by: numberkruncherPosted on 2009-06-30 at 12:25:38ID: 24748630

Try something like the following, there are several changes that you need to make, I have indicated those using comments.

Load Tree Nodes
----------------
 
' Data structure to store both entity ID and Type!
Public Structure EntityNodeData
	Public entityID As String
	Public entityType As String
 
	Public Sub New(ByVal id As String, ByVal type As String)
		entityID = id
		entityType = type
	End Sub
End Structure
 
Protected Function KNavigator_LoadNode( _
         ByRef oDataSource As DataSet, _
         ByRef NodeParent As Telerik.Web.UI.RadTreeNode, _
         ByRef Parent_Id As Integer _
         ) As Boolean
        Try
            'Dim ie As IEnumerator = oDataSource.GetEnumerator
            'Dim e As Entity
            'ie.Reset()
            Dim t As DataTable
            t = oDataSource.Tables("Nodes")
            Dim strExpr As String
            Dim strSort As String
            strExpr = " entity_pid1 = " + Parent_Id.ToString
            ' Sort descending by column named CompanyName.
            strSort = "lexicontypeordinal,entityname "
            Dim foundRows() As DataRow
 
            foundRows = t.Select(strExpr, strSort)
 
            For Each dr As DataRow In foundRows
                Dim xNode As New Telerik.Web.UI.RadTreeNode
                'format node for given entity
                With xNode
                    .Attributes.Add("Entity_ID", dr.Item("Entity_ID").ToString)
                    .Attributes.Add("Tag", "eClass")
 
                    ' Use data structure so that both ID and Type can be accessed at a later stage.
                    .Value = New EntityNodeData(dr.Item("Entity_ID").ToString, dr.Item("EntityType_Code").ToString)
                    
                    .Text = dr.Item("EntityName").ToString
                    .ImageUrl = Navigator_GetImageURL(dr.Item("EntityType_Code").ToString)
                End With
                NodeParent.Nodes.Add(xNode)
                Dim ds As New DataSet
                Dim rc As nsRALPH_ENUM.DAL_ReturnCode = OK
                Dim htable As New Hashtable
                htable = CType(Session("ExpandedNode"), Hashtable)
                rc = dvl.View_SubFolders(CInt(dr.Item("Entity_ID")), ds)
                If htable IsNot Nothing Then
                    If ds.Tables(0).Rows.Count > 0 AndAlso Not htable.Contains(dr.Item("Entity_ID").ToString) Then _
                        xNode.ExpandMode = TreeNodeExpandMode.ServerSideCallBack
                    If htable.Contains(dr.Item("Entity_ID").ToString) Then
                        xNode.Expanded = True
                        xNode.ExpandMode = TreeNodeExpandMode.ServerSide
                    Else
                        xNode.Expanded = False
                    End If
 
                Else
                    If ds.Tables(0).Rows.Count > 0 Then
                        xNode.ExpandMode = TreeNodeExpandMode.ServerSideCallBack
                    End If
                End If
                _CurrentEntity = CType(Session("CurrentEntity"), Entity)
                If _CurrentEntity IsNot Nothing Then
                    If dr.Item("Entity_ID").ToString = _CurrentEntity.Entity_ID.ToString Then
                        xNode.Selected = True
                    End If
                End If
                KNavigator_LoadNode(oDataSource, xNode, CInt(dr.Item("Entity_ID").ToString))
 
	'******
	' TODO: 1) You will need to change "Project" to the entity type name!!
	'		2) Adjust "YOUR IMAGE PATH!" to point to an icon of some sort.
	'******
				' If parent node is a project, add notices node at end.
				Dim entityData As EntityNodeData = NodeParent.Value
                If Not entityData Is Nothing And entityData.entityType = "Project" Then
                	Dim noticesNode As New Telerik.Web.UI.RadTreeNode
                	With noticesNode
	                    .Attributes.Add("Entity_ID", dr.Item("Entity_ID").ToString)
	                    .Attributes.Add("Tag", "eClass")
 
	                    .Value = New EntityNodeData("", "ProjectNoticesNode")
	                    
	                    .Text = dr.Item("EntityName").ToString
	                    .ImageUrl = "YOUR IMAGE PATH!"
                	End With
                End If
            Next
 
            Return True
        Catch ex As Exception
            RaiseMessage(False, "Navigator_LoadNode(eZ) Exception Error: " & ex.Message)
            Return False
        End Try
    End Function

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by: John500Posted on 2009-06-30 at 13:52:55ID: 24749470

Ok, thanks for that last post......

The page which contains this code is a master page and starts like this:

Partial Public Class BF_MasterPage
Inherits System.Web.UI.MasterPage
....
Public Structure EntityNodeData
...

I stuck the structure code just below this. Sound right?

Also, I have errors where ever the assignment to the value occurs. For instance:

With xNode
.Attributes.Add("Entity_ID", dr.Item("Entity_ID").ToString)
.Attributes.Add("Tag", "eClass")

' Use data structure so that both ID and Type can be accessed at a later stage.
.Value = New EntityNodeData(dr.Item("Entity_ID").ToString, dr.Item("EntityType_Code").ToString) ****** ERROR *****

.Text = dr.Item("EntityName").ToString
.ImageUrl = Navigator_GetImageURL(dr.Item("EntityType_Code").ToString)
End With

The error:

Value of type 'BF_MasterPage.EntityNodeData' cannot be converted to 'String'.

Your thoughts?

by: numberkruncherPosted on 2009-06-30 at 14:13:28ID: 24749674

> I stuck the structure code just below this. Sound right?

Yep, that should be fine! Place the replacement class in the same place.

> Also, I have errors where ever the assignment to the value occurs. For instance:

Ah, I was afraid that might happen, I was hoping that "Value" was of type "Object" or "Variant". Okay, this shouldn't be a problem.

In that case, you will need to subclass the "RadTreeNode" class so that it does support what you need. This is probably a good idea anyhow, you will be able to store any information you want to with each node:

Replace the struct with the following class:
============================================
    Public Class EntityTreeNode
        Inherits RadTreeNode
 
        Public Sub New(ByVal id As String, ByVal type As String)
            EntityID = id
            EntityType = type
        End Sub
 
        Public Property EntityType() As String
            Get
                Return Me._entityType
            End Get
            Set(ByVal value As String)
                Me._entityType = value
            End Set
        End Property
 
        Public Property EntityID() As String
            Get
                Return Me._entityID
            End Get
            Set(ByVal value As String)
                Me._entityID = value
            End Set
        End Property
 
        Private _entityType As String
        Private _entityID As String
    End Class
 
 
Update your source:
===================
Protected Function KNavigator_LoadNode( _
         ByRef oDataSource As DataSet, _
         ByRef NodeParent As Telerik.Web.UI.RadTreeNode, _
         ByRef Parent_Id As Integer _
         ) As Boolean
        Try
            'Dim ie As IEnumerator = oDataSource.GetEnumerator
            'Dim e As Entity
            'ie.Reset()
            Dim t As DataTable
            t = oDataSource.Tables("Nodes")
            Dim strExpr As String
            Dim strSort As String
            strExpr = " entity_pid1 = " + Parent_Id.ToString
            ' Sort descending by column named CompanyName.
            strSort = "lexicontypeordinal,entityname "
            Dim foundRows() As DataRow
 
            foundRows = t.Select(strExpr, strSort)
 
            For Each dr As DataRow In foundRows
                Dim xNode As New EntityTreeNode
                'format node for given entity
                With xNode
                    .Attributes.Add("Entity_ID", dr.Item("Entity_ID").ToString)
                    .Attributes.Add("Tag", "eClass")
 
                    ' Use data structure of our custom node!
                    .EntityID = dr.Item("Entity_ID").ToString
                    .EntityType = dr.Item("EntityType_Code").ToString
                    
                    .Text = dr.Item("EntityName").ToString
                    .ImageUrl = Navigator_GetImageURL(dr.Item("EntityType_Code").ToString)
                End With
                NodeParent.Nodes.Add(xNode)
                Dim ds As New DataSet
                Dim rc As nsRALPH_ENUM.DAL_ReturnCode = OK
                Dim htable As New Hashtable
                htable = CType(Session("ExpandedNode"), Hashtable)
                rc = dvl.View_SubFolders(CInt(dr.Item("Entity_ID")), ds)
                If htable IsNot Nothing Then
                    If ds.Tables(0).Rows.Count > 0 AndAlso Not htable.Contains(dr.Item("Entity_ID").ToString) Then _
                        xNode.ExpandMode = TreeNodeExpandMode.ServerSideCallBack
                    If htable.Contains(dr.Item("Entity_ID").ToString) Then
                        xNode.Expanded = True
                        xNode.ExpandMode = TreeNodeExpandMode.ServerSide
                    Else
                        xNode.Expanded = False
                    End If
 
                Else
                    If ds.Tables(0).Rows.Count > 0 Then
                        xNode.ExpandMode = TreeNodeExpandMode.ServerSideCallBack
                    End If
                End If
                _CurrentEntity = CType(Session("CurrentEntity"), Entity)
                If _CurrentEntity IsNot Nothing Then
                    If dr.Item("Entity_ID").ToString = _CurrentEntity.Entity_ID.ToString Then
                        xNode.Selected = True
                    End If
                End If
                KNavigator_LoadNode(oDataSource, xNode, CInt(dr.Item("Entity_ID").ToString))
 
        '******
        ' TODO: 1) You will need to change "**Project**" to the entity type name!!
        '       2) Adjust "***YOUR IMAGE PATH!***" to point to an icon of some sort.
        '******
				' If parent node is a project, add notices node at end.
				Dim entityNode As EntityTreeNode = NodeParent
                If Not entityNode Is Nothing And entityNode.EntityType = "**Project**" Then
                        Dim noticesNode As New Telerik.Web.UI.RadTreeNode
                        With noticesNode
                            .Value = "ProjectNoticesNode"
                            .Text = "Notices"
                            .ImageUrl = "***YOUR IMAGE PATH!***"
                        End With
                End If
            Next
 
            Return True
        Catch ex As Exception
            RaiseMessage(False, "Navigator_LoadNode(eZ) Exception Error: " & ex.Message)
            Return False
        End Try
    End Function

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Select all Open in new window

by: numberkruncherPosted on 2009-06-30 at 14:14:57ID: 24749688

Just to add, please note that some subtle changes have been made, like on line 57, for example:

Dim xNode As New EntityTreeNode

by: John500Posted on 2009-07-01 at 05:45:11ID: 24753700

>> some subtle changes have been made, like on line 57, for example:

Ok, on that particular line I'm getting the following errors:

Argument not specified for parameter 'id' of 'Public Sub New(id As String, type As String)'
Argument not specified for parameter 'type' of 'Public Sub New(id As String, type As String)'

After that I have the following two errors for the associated lines:
----------------------------------------------------------------------------------------------------------------------------------------

ERROR ON *** xNode ***

KNavigator_LoadNode(oDataSource, xNode, CInt(dr.Item("Entity_ID").ToString))

Option Strict On disallows narrowing from type 'Telerik.Web.UI.RadTreeNode' to type 'BF_MasterPage.EntityTreeNode' in copying the value of 'ByRef' parameter 'NodeParent' back to the matching argument.
----------------------------------------------------------------------------------------------------------------------------------------

ERROR ON *** NodeParent ***

Dim entityNode As EntityTreeNode = NodeParent

Option Strict On disallows implicit conversions from 'Telerik.Web.UI.RadTreeNode' to 'BF_MasterPage.EntityTreeNode'.
----------------------------------------------------------------------------------------------------------------------------------------

by: numberkruncherPosted on 2009-07-01 at 05:55:25ID: 24753803

> Ok, on that particular line I'm getting the following errors:

Please verify that you have written the following:
Public Sub New(ByVal id As String, ByVal type As String)

NOT the following:
Public Sub New(id As String, type As String)

> After that I have the following two errors for the associated lines:

Can you please post your full page code so that I can investigate?

by: John500Posted on 2009-07-01 at 06:20:31ID: 24754012

>> Can you please post your full page code so that I can investigate?

I would love to but there are 1,692 lines on this particular page if that's indeed what you are talking about. However, I'm a little leary of the whole trade secret thing by dumping so much.

Don't you agree that although 'Inherits RadTreeNode' within the class would seem to address the original issue of type:

Dim xNode As New Telerik.Web.UI.RadTreeNode

... the ,Public Sub New()' just doesn't agree by virtue of these two parameters

(ByVal id As String, ByVal type As String)

What am I missing?

Here's the code as it is in my project:

    Public Class EntityTreeNode
        Inherits RadTreeNode
 
        Public Sub New(ByVal id As String, ByVal type As String)
            EntityID = id
            EntityType = type
        End Sub
 
        Public Property EntityType() As String
            Get
                Return Me._entityType
            End Get
            Set(ByVal value As String)
                Me._entityType = value
            End Set
        End Property
 
        Public Property EntityID() As String
            Get
                Return Me._entityID
            End Get
            Set(ByVal value As String)
                Me._entityID = value
            End Set
        End Property
 
        Private _entityType As String
        Private _entityID As String
    End Class
 
 
Protected Function KNavigator_LoadNode( _
             ByRef oDataSource As DataSet, _
             ByRef NodeParent As Telerik.Web.UI.RadTreeNode, _
             ByRef Parent_Id As Integer _
             ) As Boolean
        Try
            'Dim ie As IEnumerator = oDataSource.GetEnumerator
            'Dim e As Entity
            'ie.Reset()
            Dim t As DataTable
            t = oDataSource.Tables("Nodes")
            Dim strExpr As String
            Dim strSort As String
            strExpr = " entity_pid1 = " + Parent_Id.ToString
            ' Sort descending by column named CompanyName.
            strSort = "lexicontypeordinal,entityname "
            Dim foundRows() As DataRow
 
            foundRows = t.Select(strExpr, strSort)
 
            For Each dr As DataRow In foundRows
                Dim xNode As New EntityTreeNode          ' ******** ERROR HERE ON xNode ********
                'format node for given entity
                With xNode
                    .Attributes.Add("Entity_ID", dr.Item("Entity_ID").ToString)
                    .Attributes.Add("Tag", "eClass")
 
                    ' Use data structure of our custom node!
                    .EntityID = dr.Item("Entity_ID").ToString
                    .EntityType = dr.Item("EntityType_Code").ToString
 
                    .Text = dr.Item("EntityName").ToString
                    .ImageUrl = Navigator_GetImageURL(dr.Item("EntityType_Code").ToString)
                End With
                NodeParent.Nodes.Add(xNode)
                Dim ds As New DataSet
                Dim rc As nsRALPH_ENUM.DAL_ReturnCode = OK
                Dim htable As New Hashtable
                htable = CType(Session("ExpandedNode"), Hashtable)
                rc = dvl.View_SubFolders(CInt(dr.Item("Entity_ID")), ds)
                If htable IsNot Nothing Then
                    If ds.Tables(0).Rows.Count > 0 AndAlso Not htable.Contains(dr.Item("Entity_ID").ToString) Then _
                        xNode.ExpandMode = TreeNodeExpandMode.ServerSideCallBack
                    If htable.Contains(dr.Item("Entity_ID").ToString) Then
                        xNode.Expanded = True
                        xNode.ExpandMode = TreeNodeExpandMode.ServerSide
                    Else
                        xNode.Expanded = False
                    End If
 
                Else
                    If ds.Tables(0).Rows.Count > 0 Then
                        xNode.ExpandMode = TreeNodeExpandMode.ServerSideCallBack
                    End If
                End If
                _CurrentEntity = CType(Session("CurrentEntity"), Entity)
                If _CurrentEntity IsNot Nothing Then
                    If dr.Item("Entity_ID").ToString = _CurrentEntity.Entity_ID.ToString Then
                        xNode.Selected = True
                    End If
                End If
                KNavigator_LoadNode(oDataSource, xNode, CInt(dr.Item("Entity_ID").ToString))  ' ******** ERROR HERE ON xNode ********
 
                '******
                ' TODO: 1) You will need to change "**Project**" to the entity type name!!
                '       2) Adjust "***YOUR IMAGE PATH!***" to point to an icon of some sort.
                '******
                ' If parent node is a project, add notices node at end.
                Dim entityNode As EntityTreeNode = NodeParent                                  ' ******** ERROR HERE ON NodeParent ********
                If Not entityNode Is Nothing And entityNode.EntityType = "Notice Templates" Then
                    Dim noticesNode As New Telerik.Web.UI.RadTreeNode
                    With noticesNode
                        .Value = "ProjectNoticesNode"
                        .Text = "Notices"
                        .ImageUrl = "~/images/main heading icon_Notices.gif"
                    End With
                End If
            Next
 
            Return True
        Catch ex As Exception
            RaiseMessage(False, "Navigator_LoadNode(eZ) Exception Error: " & ex.Message)
            Return False
        End Try
    End Function

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Select all Open in new window

by: John500Posted on 2009-07-01 at 06:34:40ID: 24754137

Maybe there is something else I can provide that doesn't include all 1,692 lines of code, yes/no?

For example, here is the code for the main load of the page or tree:

Protected Sub kNavigatorMain_Load(ByVal LocationID As Integer)
        Try
            Dim amok As Boolean = True
            Dim returnmessage As String = ""
            Dim rc As nsRALPH_ENUM.DAL_ReturnCode
            Dim setCurrentEntity As Boolean = False
 
            'Get extended Entity object for the given LocationID
            Dim eClass As New Entity
            Dim nodes_dset As New DataSet
            rc = dvl.View_TreeNodeList(_Token.LoginLocation_ID, nodes_dset)
 
            Dim def As String = Now.TimeOfDay.ToString
            'Instance My Nodes
            Dim MyNode As New Telerik.Web.UI.RadTreeNode
            MyNode.Text = "My Home Page"
            MyNode.Value = "MYHOME"
            MyNode.ImageUrl = "~/images/Nav_MyHomePage.gif"
            MyNode.Attributes.Add("Tag", _Token.LoginLocation_ID.ToString)
            Dim pNode As New Telerik.Web.UI.RadTreeNode
            With pNode
                .Text = "My Projects"
                .Value = "MYPROJECT"
                .ImageUrl = "~/images/Nav_MyProjects.gif"
                .Attributes.Add("Tag", "MYPROJECT")
            End With
            MyNode.Nodes.Add(pNode.Clone)
            Dim cNode As New Telerik.Web.UI.RadTreeNode
            With cNode
                .Text = "My Contacts"
                .Value = "MYCONTACT"
                .ImageUrl = "~/images/Nav_MyContacts.gif"
                .Attributes.Add("Tag", "MYCONTACT")
            End With
            MyNode.Nodes.Add(cNode.Clone)
            Dim aNode As New Telerik.Web.UI.RadTreeNode
            With aNode
                .Text = "Administration"
                .Value = "MYADMIN"
                .ImageUrl = "~/images/Nav_MyContacts.gif"
                .Attributes.Add("Tag", "MYADMIN")
            End With
            MyNode.Nodes.Add(aNode.Clone)
            NavigatorMain.Nodes.Add(MyNode.Clone)
            pNode = Nothing
            cNode = Nothing
            aNode = Nothing
            MyNode = Nothing
 
            'instance Root Node
            Dim Node As New Telerik.Web.UI.RadTreeNode
            Dim strExpr As String
            Dim strSort As String
            strExpr = " entity_id = " + _Token.LoginLocation_ID.ToString
            strSort = "lexicontypeordinal,entityname "
 
            Dim foundRows() As DataRow
            Dim t As DataTable
            t = nodes_dset.Tables("Nodes")
            foundRows = t.Select(strExpr, strSort)
            Dim dr As DataRow = foundRows(0)
 
            With Node
                .Attributes.Add("Entity_ID", dr.Item("Entity_ID").ToString)
                .Attributes.Add("Tag", "eClass")
                .Value = dr.Item("Entity_ID").ToString
                .Text = dr.Item("EntityName").ToString
                .ImageUrl = Navigator_GetImageURL(dr.Item("EntityType_Code").ToString)
            End With
 
		********************  CALL TO KNavigator_LoadNode() HERE ********************
 
            If amok Then _	
                amok = KNavigator_LoadNode(nodes_dset, Node, CInt(_Token.LoginLocation_ID.ToString))
 
            If amok AndAlso Node IsNot Nothing Then
                'add eClass node
                NavigatorMain.Nodes.Add(Node)
 
                'set selected node
                NavigatorMain.Nodes(0).Expanded = True
                NavigatorMain.Nodes(1).Expanded = True
 
                Select Case Me.Parent.ToString
                    Case "BF-Home"
                        Me.NavigatorMain.Nodes(1).Selected = True
                        setCurrentEntity = True
                    Case "BF-MyProjects"
                        Me.NavigatorMain.Nodes(0).Nodes(0).Selected = True
                    Case "BF-MyContacts"
                        Me.NavigatorMain.Nodes(0).Nodes(1).Selected = True
                    Case "BF-Admin"
                        Me.NavigatorMain.Nodes(0).Nodes(2).Selected = True
                End Select
 
            End If
 
            'set current entity
            If amok AndAlso setCurrentEntity Then
                If _CurrentEntity Is Nothing Then _CurrentEntity = New Entity
                amok = bll.eList_ByOption(CType(Me.NavigatorMain.SelectedNode.Value, Integer), _CurrentEntity, returnmessage)
                Session("CurrentEntity") = _CurrentEntity
            End If
 
            'clean-up
            Node = Nothing
            'Dim selectednode As New RadTreeNode
            'selectednode = CType(Session("SelectedNode"), RadTreeNode)
            'selectednode.Selected = True
        Catch ex As Exception
            RaiseMessage(False, "BuildflowMaster.NavigatorMain_Load Exception Error: " & ex.Message)
        End Try
    End Sub

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Select all Open in new window

by: numberkruncherPosted on 2009-07-01 at 07:28:44ID: 24754689

> would love to but there are 1,692 lines on this particular page if that's indeed what you are
> talking about. However, I'm a little leary of the whole trade secret thing by dumping so much.

Sure, 1,692 would be excessive, and you should never release anything that you want to keep secret.

> What am I missing?

Actually it is something that I missed, simply change the class that you added to the following. Apologies for this error on my part.

    Public Class EntityTreeNode
        Inherits RadTreeNode
 
        Public Sub New()
 
        End Sub
 
        Public Sub New(ByVal id As String, ByVal type As String)
            EntityID = id
            EntityType = type
        End Sub
 
        Public Property EntityType() As String
            Get
                Return Me._entityType
            End Get
            Set(ByVal value As String)
                Me._entityType = value
            End Set
        End Property
 
        Public Property EntityID() As String
            Get
                Return Me._entityID
            End Get
            Set(ByVal value As String)
                Me._entityID = value
            End Set
        End Property
 
        Private _entityType As String
        Private _entityID As String
    End Class

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Select all Open in new window

by: John500Posted on 2009-07-01 at 07:56:07ID: 24754992

Ok, the added Sub New() got rid of the first error but still have these two:

----------------------------------------------------------------------------------------------------------------------------------------

ERROR ON *** xNode ***

KNavigator_LoadNode(oDataSource, xNode, CInt(dr.Item("Entity_ID").ToString))

Option Strict On disallows narrowing from type 'Telerik.Web.UI.RadTreeNode' to type 'BF_MasterPage.EntityTreeNode' in copying the value of 'ByRef' parameter 'NodeParent' back to the matching argument.
----------------------------------------------------------------------------------------------------------------------------------------

ERROR ON *** NodeParent ***

Dim entityNode As EntityTreeNode = NodeParent

Option Strict On disallows implicit conversions from 'Telerik.Web.UI.RadTreeNode' to 'BF_MasterPage.EntityTreeNode'.
----------------------------------------------------------------------------------------------------------------------------------------

Can you tell me why the compiler sees this as a conversion rather than a modification of attributes? Isn't that what you are trying to do?

by: numberkruncherPosted on 2009-07-01 at 08:03:07ID: 24755073

Have a go at the following:

Dim entityNode As EntityTreeNode = TryCast(NodeParent, EntityTreeNode)

This might address both issues,

by: John500Posted on 2009-07-01 at 08:17:32ID: 24755230

This took care of the second error. Only this one now:

----------------------------------------------------------------------------------------------------------------------------------------

ERROR ON *** xNode ***

KNavigator_LoadNode(oDataSource, xNode, CInt(dr.Item("Entity_ID").ToString))

Option Strict On disallows narrowing from type 'Telerik.Web.UI.RadTreeNode' to type 'BF_MasterPage.EntityTreeNode' in copying the value of 'ByRef' parameter 'NodeParent' back to the matching argument.
----------------------------------------------------------------------------------------------------------------------------------------

I guess the recursive aspect of this entire method doesn't like going back and forth between 'EntityTreeNode' and 'Telerik.Web.UI.RadTreeNode' - right?

by: John500Posted on 2009-07-01 at 08:19:30ID: 24755255

Maybe this is a case of a lazy control - just doesn't want to do the work - yes/no?

Kidding

by: numberkruncherPosted on 2009-07-01 at 08:25:28ID: 24755328

> Maybe this is a case of a lazy control - just doesn't want to do the work - yes/no?
rofl - funny!

> I guess the recursive aspect of this entire method doesn't like going back and forth between 'EntityTreeNode' and 'Telerik.Web.UI.RadTreeNode' - right?

Try using the following line instead, perhaps a TryCast will work here too.

KNavigator_LoadNode(oDataSource, TryCast(xNode, RadTreeNode), CInt(dr.Item("Entity_ID").ToString))

by: John500Posted on 2009-07-01 at 09:11:25ID: 24755820

Getting closer all the time.

I ran the code and it worked from the standpoint there were no runtime errors. However, it only shows the icons in the far left picture below. Thus, no subfolders are being added.

The picture on the far right shows what it normally looks like. The fully expanded view is at the top of this question.

Can you tell me if you agree with what I see going on here:

Steps

1) Create table for incoming dataset
2) Sort the table and store it in foundRows() table
3) For each row in the sorted table create a node
4) For each node set the attributes
5) Add the new node to the parent node
6) Get new dataset based upon whether the database shows
subfolders/objects for the current Entity_ID
7) If so, add the result of the dataset to XNode
8) If the current Entity_ID is a of type 'Notice Templates'
add an icon to it

Did I miss anything? I'm trying to see why the subfolders weren't added but I don't see it. I'm also wondering why the following subnodes/folders aren't added during a normal load but this time they were:

My Projects
My Contacts
Administration

I take it there is a filter in the event there is no data to load?

tree-result.JPG
- 15 KB
after and before

by: John500Posted on 2009-07-01 at 11:20:12ID: 24756825

Would you agree the following line needs to be included which was in the original code:

.Value = dr.Item("Entity_ID").ToString

Current/Revised Code:
--------------------------------
With xNode
                    .Attributes.Add("Entity_ID", dr.Item("Entity_ID").ToString)
                    .Attributes.Add("Tag", "eClass")
 
                    ' Use data structure of our custom node!
                    .EntityID = dr.Item("Entity_ID").ToString
                    .EntityType = dr.Item("EntityType_Code").ToString
 
                    .Text = dr.Item("EntityName").ToString
                    .ImageUrl = Navigator_GetImageURL(dr.Item("EntityType_Code").ToString)
End With
 
 
Original Code
--------------------------
With xNode
                    .Attributes.Add("Entity_ID", dr.Item("Entity_ID").ToString)
                    .Attributes.Add("Tag", "eClass")
                    .Value = dr.Item("Entity_ID").ToString
                    .Text = dr.Item("EntityName").ToString
                    .ImageUrl = Navigator_GetImageURL(dr.Item("EntityType_Code").ToString)
End With

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Select all Open in new window

by: numberkruncherPosted on 2009-07-01 at 16:14:14ID: 24759111

The only thing that I can think is that perhaps the RadTree compares each tree node instance with something internal for some reason.

Backup what you have and change the following part. If all of the project tree nodes appear again, then this is the reason why, and we will need to find another way to associate additional information with each node.

Simply change xNode back to "RadTreeNode" and remove the two indicated lines from the With xNode block. This will not fix your problem, but it will indicate whether or not this approach is going to work.

            For Each dr As DataRow In foundRows
                Dim xNode As New RadTreeNode          ' ***** CHANGE
                'format node for given entity
                With xNode
                    .Attributes.Add("Entity_ID", dr.Item("Entity_ID").ToString)
                    .Attributes.Add("Tag", "eClass")
 
        ' ***** REMOVED .EntityID and .EntityType
 
                    .Text = dr.Item("EntityName").ToString
                    .ImageUrl = Navigator_GetImageURL(dr.Item("EntityType_Code").ToString)
                End With

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Select all Open in new window

by: John500Posted on 2009-07-02 at 05:37:04ID: 24762564

I wish I could say that worked but it doesn't. Same results as the last picture I posted.

For what ever it's worth, I included some write statements so that I could get a better idea of what's going on. Below you can see the results given the original code and the revised. Everything in the database is sample data in case you are wondering.

I inserted three WriteToFile() statements.

1) First statement within - kNavigatorMain_Load( ... )
2) First statement within - KNavigator_LoadNode( ... ) As Boolean
3) After xNode attributes are assigned ( seen below )

All of this may be obvious to you so forgive the extra information if it is. Otherwise I see that for 'For Each dr As DataRow In foundRows' the revised code somehow stores two DataRows where the original does not.

Original Code
------------------------------------------------------------------------------------------------------------------------
kNavigatorMain_Load( ByVal LocationID As Integer )

KNavigator_LoadNode( ByRef oDataSource As DataSet, ByRef NodeParent As Telerik.Web.UI.RadTreeNode, ByRef Parent_Id As Integer ) As Boolean )

      Value:      317
      Text:            ABC EAST
KNavigator_LoadNode( ByRef oDataSource As DataSet, ByRef NodeParent As Telerik.Web.UI.RadTreeNode, ByRef Parent_Id As Integer ) As Boolean )

      Value:      1166
      Text:            asdfsdfewef
KNavigator_LoadNode( ByRef oDataSource As DataSet, ByRef NodeParent As Telerik.Web.UI.RadTreeNode, ByRef Parent_Id As Integer ) As Boolean )

      Value:      1168
      Text:            New Office
KNavigator_LoadNode( ByRef oDataSource As DataSet, ByRef NodeParent As Telerik.Web.UI.RadTreeNode, ByRef Parent_Id As Integer ) As Boolean )

      Value:      1184
      Text:            RyoungEun House
KNavigator_LoadNode( ByRef oDataSource As DataSet, ByRef NodeParent As Telerik.Web.UI.RadTreeNode, ByRef Parent_Id As Integer ) As Boolean )
...
...
...
125 nodes total
------------------------------------------------------------------------------------------------------------------------

Revised Code Results
------------------------------------------------------------------------------------------------------------------------
kNavigatorMain_Load( ByVal LocationID As Integer )

KNavigator_LoadNode( ByRef oDataSource As DataSet, ByRef NodeParent As Telerik.Web.UI.RadTreeNode, ByRef Parent_Id As Integer ) As Boolean )

      Value:      317
      Text:      ABC EAST
KNavigator_LoadNode( ByRef oDataSource As DataSet, ByRef NodeParent As Telerik.Web.UI.RadTreeNode, ByRef Parent_Id As Integer ) As Boolean )

      Value:      1166
      Text:      asdfsdfewef
      Value:      5
      Text:      ABC Builders
kNavigatorMain_Load( ByVal LocationID As Integer )

KNavigator_LoadNode( ByRef oDataSource As DataSet, ByRef NodeParent As Telerik.Web.UI.RadTreeNode, ByRef Parent_Id As Integer ) As Boolean )

      Value:      317
      Text:      ABC EAST
KNavigator_LoadNode( ByRef oDataSource As DataSet, ByRef NodeParent As Telerik.Web.UI.RadTreeNode, ByRef Parent_Id As Integer ) As Boolean )

      Value:      1166
      Text:      asdfsdfewef
      Value:      5
      Text:      ABC Builders

NO MORE DATA / NODES
------------------------------------------------------------------------------------------------------------------------


 
                Dim xNode As New RadTreeNode
                'format node for given entity
                With xNode
                    .Attributes.Add("Entity_ID", dr.Item("Entity_ID").ToString)
                    .Attributes.Add("Tag", "eClass")
 
                    ' Use data structure of our custom node!
 
                    .Value = dr.Item("Entity_ID").ToString
                    .Text = dr.Item("EntityName").ToString
                    .ImageUrl = Navigator_GetImageURL(dr.Item("EntityType_Code").ToString)
                End With
 
                Dim xNodeString = ControlChars.Tab + "Value:  " + ControlChars.Tab + xNode.Value.ToString() + ControlChars.NewLine + _
                                  ControlChars.Tab + "Text:  " + ControlChars.Tab + ControlChars.Tab + xNode.Text.ToString()
 
                WriteToFile("C:\ApplicationTree.txt", xNodeString + ControlChars.NewLine)

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Select all Open in new window

by: John500Posted on 2009-07-02 at 06:00:50ID: 24762768

I guess another point worth mentioning is that although the revised code appears to create six nodes ( seen with WriteToFile() ), these nodes never make it to the web page http://#ID:24755820

by: John500Posted on 2009-07-06 at 13:36:13ID: 31598363

As it turns out, a tree node would be populated by an entry to the database. I had a feeling this was true but couldn't verify last week while a coworker was on vacation.

Thanks

by: numberkruncherPosted on 2009-07-07 at 03:18:46ID: 24792867

Hi,

Sorry I was unable to respond to your last two posts. We have been without an Internet connection for 4 days due to damage caused by lightening.

Feel free to tag on links to further questions and if I can help I will.

20120131-EE-VQP-002

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How to add a subcategory/object to a tree (Telerik RadTreeView)

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