Rank 1
I am having following problem when using RadTreeView within a WebUserControl which is dynamically loaded on a main aspx page. I use ExpandeMode=TreeNodeExpandMode.ServerSideCallBack for node expand event. The tree, whose root nodes are loaded within OnPreRender, keep getting rebuilt everytime i do NodeClick to load a RadGrid data. Is there a different place that I can put the code to built the tree roots so it do not get refreshed within OnPreRender event.
Below are my source codes:
.vb
Partial
Class Controls_DocumentInquiry_BatchDetails
Inherits ContentControl
Protected Overrides Sub OnPreRender(ByVal e As EventArgs)
MyBase.OnPreRender(e)
If Not IsPostBack Then
End If
If StageName <> "" Then
Dim dsScanMainBatches As DataSet = ScanMainData
Dim dsBatchMainBatches As DataSet = batchmainData
Dim dsStages As DataSet = AllStagesData
Dim drStage() As DataRow
For Each dt As DataTable In dsStages.Tables
drStage = dt.Select(
"StageID = " & StageID)
If drStage.Length > 0 Then
Exit For
End If
Next
LoadRootNodes(rtvBatches, TreeNodeExpandMode.ServerSideCallBack, StageName, drStage, dsScanMainBatches, dsBatchMainBatches)
End If
End Sub
Protected Sub Page_Load(ByVal source As Object, ByVal e As EventArgs)
End Sub
Protected Sub Page_Init(ByVal source As Object, ByVal e As EventArgs)
End Sub
Protected Sub rgBatchDetails_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles rgBatchDetails.SelectedIndexChanged
'Display the image
Dim strBatchNumber As String = rgBatchDetails.SelectedItems(0).Cells(2).Text
Dim strImageFile As String = rgBatchDetails.SelectedItems(0).Cells(3).Text
GridImageDetails.LoadData(
"Image.aspx?ImageLocation=C:\CMMain\CMData\Output\" & strBatchNumber & "\" & strImageFile)
End Sub
Protected Sub rtvBatches_NodeClick(ByVal sender As Object, ByVal e As RadTreeNodeEventArgs)
rgBatchDetails.Rebind()
End Sub
Public Function GetBatchViewData(ByVal nodeSelected As RadTreeNode) As DataSet
Dim ds As New DataSet
If nodeSelected.Value.Substring(0, 4) = "BATC" Then
ds = objRTLWebService.Retrieve_DocumentsByBatch(nodeSelected.Text, strError)
ElseIf nodeSelected.Value.Substring(0, 4) = "GROU" Then
ds = objRTLWebService.Retrieve_DocumentsByGroup(nodeSelected.ParentNode.Text, nodeSelected.Text, strError)
ElseIf nodeSelected.Text = "OPEN/PENDING" Then
End If
Return ds
End Function
Private Function CreateNode(ByVal strName As String, ByVal isExpanded As Boolean) As RadTreeNode
Dim node As New RadTreeNode(strName)
node.Expanded = isExpanded
Return node
End Function
Private Shared Sub LoadRootNodes(ByVal treeBatches As RadTreeView, ByVal expandMode As TreeNodeExpandMode, _
ByVal strStageName As String, ByVal drStage() As DataRow, _
ByVal dsScanMainBatches As DataSet, ByVal dsBatchMainBatches As DataSet)
If drStage.Length = 0 Then
Dim a = 0
Exit Sub
Else
treeBatches.Nodes.Clear()
Dim intCounter1 As Integer = 0
Dim intCounter2 As Integer = 0
Dim strOpenStatus As String = drStage(0).Item("OpenStatus").ToString
Dim strInProgressStatus As String = drStage(0).Item("InProgressStatus").ToString
Dim strCompleteStatus As String = drStage(0).Item("CompleteStatus").ToString
If strStageName = "SCANNING" Then
Dim drOpen() As DataRow = dsScanMainBatches.Tables(0).Select("BatchStatus = '" & strOpenStatus & "'")
Dim drInProgress() As DataRow = dsScanMainBatches.Tables(0).Select("BatchStatus = '" & strInProgressStatus & "'")
Dim drComplete() As DataRow = dsScanMainBatches.Tables(0).Select("BatchStatus = '" & strCompleteStatus & "'")
intCounter1 = drOpen.Length + drInProgress.Length
intCounter2 = drComplete.Length
Else
Dim drOpen() As DataRow = dsBatchMainBatches.Tables(0).Select("BatchStatus = '" & strOpenStatus & "'")
Dim drInProgress() As DataRow = dsBatchMainBatches.Tables(0).Select("BatchStatus = '" & strInProgressStatus & "'")
Dim drComplete() As DataRow = dsBatchMainBatches.Tables(0).Select("BatchStatus = '" & strCompleteStatus & "'")
intCounter1 = drOpen.Length + drInProgress.Length
intCounter2 = drComplete.Length
End If
Dim node As New RadTreeNode()
node.Text =
"Open/Pending" & "(" & intCounter1.ToString() & ")"
node.Value =
"0" & strStageName
node.ToolTip =
"ROOT"
If intCounter1 > 0 Then
node.ExpandMode = expandMode
End If
treeBatches.Nodes.Add(node)
Dim node1 As New RadTreeNode()
node1.Text =
"Complete" & "(" & intCounter2.ToString() & ")"
node1.Value =
"1" & strStageName
node1.ToolTip =
"ROOT"
If intCounter2 > 0 Then
node1.ExpandMode = expandMode
End If
treeBatches.Nodes.Add(node1)
End If
End Sub
Protected Sub rtvBatches_NodeExpand(ByVal sender As Object, ByVal e As RadTreeNodeEventArgs)
Dim dsScanMainBatches As DataSet = ScanMainData
Dim dsBatchMainBatches As DataSet = batchmainData
Dim dsStages As DataSet = AllStagesData
Dim drStage() As DataRow
For Each dt As DataTable In dsStages.Tables
drStage = dt.Select(
"StageID = " & StageID)
If drStage.Length > 0 Then
Exit For
End If
Next
PopulateNodeOnDemand(e, TreeNodeExpandMode.ServerSideCallBack, dsScanMainBatches, dsBatchMainBatches, drStage)
End Sub
Private Shared Sub PopulateNodeOnDemand(ByVal e As RadTreeNodeEventArgs, ByVal expandMode As TreeNodeExpandMode, _
ByVal dsScanMainBatches As DataSet, ByVal dsBatchMainBatches As DataSet, _
ByVal drStage() As DataRow)
Dim strNodeText As String = e.Node.Text
Dim strNodeValue As String = e.Node.Value
Dim strStageName As String = strNodeValue.Substring(1, strNodeValue.Length - 1)
If drStage.Length = 0 Then
Dim a = 0
Exit Sub
Else
Dim dtData As New DataTable
If strNodeText.ToUpper.IndexOf("OPEN/PENDING") >= 0 Then
If strStageName = "SCANNING" Or strStageName = "" Then
dtData = dsScanMainBatches.Tables(0)
Else
dtData = dsBatchMainBatches.Tables(0)
End If
Dim drData() As DataRow = dtData.Select("BatchStatus = '" & drStage(0).Item("OpenStatus") & "'")
For Each row As DataRow In drData
Dim node As New RadTreeNode()
node.Text = row(
"BatchNumber").ToString()
node.Value =
"BATCH" & row("BatchNumber").ToString()
node.ExpandMode = expandMode
e.Node.Nodes.Add(node)
Next
e.Node.Expanded =
True
ElseIf strNodeText.ToUpper.IndexOf("COMPLETE") >= 0 Then
If strStageName = "SCANNING" Then
dtData = dsScanMainBatches.Tables(0)
Else
dtData = dsBatchMainBatches.Tables(0)
End If
Dim drData() As DataRow = dtData.Select("BatchStatus = '" & drStage(0).Item("CompleteStatus") & "'")
For Each row As DataRow In drData
Dim node As New RadTreeNode()
node.Text = row(
"BatchNumber").ToString()
node.Value =
"BATCH" & row("BatchNumber").ToString()
node.ExpandMode = expandMode
e.Node.Nodes.Add(node)
Next
e.Node.Expanded =
True
ElseIf strNodeValue.Substring(0, 4) = "BATC" Then
dtData = GetGroupNodes(strNodeText)
For Each row As DataRow In dtData.Rows
Dim node As New RadTreeNode()
node.Text = row(
"DocTypeIndex").ToString("000")
node.Value =
"GROUP" & row("DocTypeIndex").ToString()
If dtData.Rows.Count > 0 Then
node.ExpandMode = expandMode
End If
e.Node.Nodes.Add(node)
Next
e.Node.Expanded =
True
ElseIf strNodeValue.Substring(0, 4) = "GROU" Then
dtData = GetDocumentNodes(e.Node.ParentNode.Text, strNodeText)
For Each row As DataRow In dtData.Rows
Dim node As New RadTreeNode()
node.Text = row(
"DocType").ToString & " " & row("ImageFile").ToString & " " & row("AccountNo").ToString & " " & row("Amount").ToString
node.Value =
"DOC" & row("ImageFile").ToString()
If dtData.Rows.Count > 0 Then
node.ExpandMode = expandMode
End If
e.Node.Nodes.Add(node)
Next
e.Node.Expanded =
True
End If
End If
End Sub
Private Shared Function GetGroupNodes(ByVal strBatchNumber As String) As DataTable
Dim dsGroups As DataSet = objRTLWebService.Retrieve_GroupsByBatch(strBatchNumber, strError)
Return dsGroups.Tables(0)
End Function
Private Shared Function GetDocumentNodes(ByVal strBatchNumber As String, ByVal strGroupNumber As String) As DataTable
Dim dsDocuments As DataSet = objRTLWebService.Retrieve_DocumentsByGroup(strBatchNumber, strGroupNumber, strError)
Return dsDocuments.Tables(0)
End Function
1 Answer, 1 is accepted
I would suggest to use the IsCallback flag to check whether a callback has been initiated and then perform any code that you need executed on a callback or not.
I tried to run the code but with no success. Could you please provide a fully working code, that could be run locally without a problem? Moreover, are you using the RadXmlHttpPanel to load the control, and if yes could you provide code showing how the user control is loaded?
Kind regards,
Pero
the Telerik team