locked
how to add treenode from backend for each year RRS feed

  • Question

  • ow to create Treenode for each year coming from databse

    i have 2 years in my database 2011 n 2012

    for each yr 2011 i have title,content ,date

    yr 2012 i have title ,content,date

    but 2011 contents month JAN,FEB ,MAR ,APR n 2012 contents month  Dec ,Nov ,Mar ,Apr

    i am able to create 2 treenodes by taking values from database but the month march of 2012 is getting added on 2011 only

     i want 2011 to have   JAN,FEB ,MAR ,APR  n 2012 has separate  Dec ,Nov ,Mar ,Apr

    but my code is adding march month in treenode 2011 plz help me to solve issue thnx

    Dim news_database As New NewsSchemaTableAdapter
            Dim news As New DataTable
            Dim new_date As Date
            Dim month As String
            Dim Latest_date As Integer
            news = news_database.GetDataByDate
    
    
            Dim news_row As DataRow = news.Rows(0)
            new_date = news_row("newsec_date")
            month = array(new_date.Month - 1)
            Date_Label.Text = new_date.Day & " " & month & ", " & new_date.Year
            Title_Label.Text = news_row("newsec_title")
    
            'To split the sentence
            Dim s As String = news_row("newsec_body")
            Dim words As String() = s.Split(New Char() {"."})
    
            Dim word As String
            '  Debug.WriteLine(words.Length())
            For Each word In words
                Body_Label.Controls.Add(HtmlHelper.GetLiteral("<div><p>" & word & "</p></div> "))
            Next
            ' Body_Label.Text = news_row("newsec_body")
            Dim id As String = news_row("newsec_id")
            Latest_date = new_date.Month
            ' Debug.WriteLine(Latest_date)
    
            If Not IsPostBack Then
                Dim yr As String = String.Empty
                For Each dr As DataRow In news.Rows
                    Dim parentnode As TreeNode = Nothing
    
                    yr = CDate(dr("newsec_date")).Year.ToString
                    Debug.WriteLine(yr)
                    parentnode = Treeview1.FindNode(yr)
                    If parentnode Is Nothing Then
                        Debug.WriteLine("Is Nothing")
                        parentnode = New TreeNode(yr, yr)
                        new_date = dr("newsec_date")
                        month = array(new_date.Month - 1)
                        Dim child As New TreeNode(month, month)
                        parentnode.Collapse()
    
    
                        Select Case new_date.Month
                            Case 1
                                Dim grandchildnode As New TreeNode(dr("newsec_title"), dr("newsec_id"))
                                jan.ChildNodes.Add(grandchildnode)
                                parentnode.ChildNodes.Add(jan)
                                jan.Collapse()
                            Case 2
                                Dim grandchildnode As New TreeNode(dr("newsec_title"), dr("newsec_id"))
                                feb.ChildNodes.Add(grandchildnode)
                                parentnode.ChildNodes.Add(feb)
                                feb.Collapse()
                            Case 3
                                Dim grandchildnode As New TreeNode(dr("newsec_title"), dr("newsec_id"))
                                mar.ChildNodes.Add(grandchildnode)
                                parentnode.ChildNodes.Add(mar)
                                mar.Collapse()
                            Case 4
                                Dim grandchildnode As New TreeNode(dr("newsec_title"), dr("newsec_id"))
                                apr.ChildNodes.Add(grandchildnode)
                                parentnode.ChildNodes.Add(apr)
                                apr.Collapse()
                            Case 5
                                Dim grandchildnode As New TreeNode(dr("newsec_title"), dr("newsec_id"))
                                may.ChildNodes.Add(grandchildnode)
                                parentnode.ChildNodes.Add(may)
                                may.Collapse()
                            Case 6
                                Dim grandchildnode As New TreeNode(dr("newsec_title"), dr("newsec_id"))
                                jun.ChildNodes.Add(grandchildnode)
                                parentnode.ChildNodes.Add(jun)
                                jun.Collapse()
                            Case 7
                                Dim grandchildnode As New TreeNode(dr("newsec_title"), dr("newsec_id"))
                                jul.ChildNodes.Add(grandchildnode)
                                parentnode.ChildNodes.Add(jul)
                                jul.Collapse()
                            Case 8
                                Dim grandchildnode As New TreeNode(dr("newsec_title"), dr("newsec_id"))
                                aug.ChildNodes.Add(grandchildnode)
                                parentnode.ChildNodes.Add(aug)
                                aug.Collapse()
                            Case 9
                                Dim grandchildnode As New TreeNode(dr("newsec_title"), dr("newsec_id"))
                                sep.ChildNodes.Add(grandchildnode)
                                parentnode.ChildNodes.Add(sep)
                                sep.Collapse()
    
                            Case 10
                                Dim grandchildnode As New TreeNode(dr("newsec_title"), dr("newsec_id"))
                                oct.ChildNodes.Add(grandchildnode)
                                parentnode.ChildNodes.Add(oct)
                                oct.Collapse()
                            Case 11
                                Dim grandchildnode As New TreeNode(dr("newsec_title"), dr("newsec_id"))
                                nov.ChildNodes.Add(grandchildnode)
                                parentnode.ChildNodes.Add(nov)
                                nov.Collapse()
                            Case 12
                                Dim grandchildnode As New TreeNode(dr("newsec_title"), dr("newsec_id"))
                                dec.ChildNodes.Add(grandchildnode)
                                parentnode.ChildNodes.Add(dec)
                                dec.Collapse()
    
                        End Select
                     
                        Treeview1.Nodes.Add(parentnode)
    
    Else
                      
                        new_date = dr("newsec_date")
                        month = array(new_date.Month - 1)
                        Dim child As New TreeNode(month, month)
                        parentnode.Collapse()
    
                        Select Case new_date.Month
                            Case 1
                                Dim grandchildnode As New TreeNode(dr("newsec_title"), dr("newsec_id"))
                                jan.ChildNodes.Add(grandchildnode)
                                parentnode.ChildNodes.Add(jan)
                                jan.Collapse()
                            Case 2
                                Dim grandchildnode As New TreeNode(dr("newsec_title"), dr("newsec_id"))
                                feb.ChildNodes.Add(grandchildnode)
                                parentnode.ChildNodes.Add(feb)
                                feb.Collapse()
                            Case 3
                                Dim grandchildnode As New TreeNode(dr("newsec_title"), dr("newsec_id"))
                                mar.ChildNodes.Add(grandchildnode)
                                parentnode.ChildNodes.Add(mar)
                                mar.Collapse()
                            Case 4
                                Dim grandchildnode As New TreeNode(dr("newsec_title"), dr("newsec_id"))
                                apr.ChildNodes.Add(grandchildnode)
                                parentnode.ChildNodes.Add(apr)
                                apr.Collapse()
                            Case 5
                                Dim grandchildnode As New TreeNode(dr("newsec_title"), dr("newsec_id"))
                                may.ChildNodes.Add(grandchildnode)
                                parentnode.ChildNodes.Add(may)
                                may.Collapse()
                            Case 6
                                Dim grandchildnode As New TreeNode(dr("newsec_title"), dr("newsec_id"))
                                jun.ChildNodes.Add(grandchildnode)
                                parentnode.ChildNodes.Add(jun)
                                jun.Collapse()
                            Case 7
                                Dim grandchildnode As New TreeNode(dr("newsec_title"), dr("newsec_id"))
                                jul.ChildNodes.Add(grandchildnode)
                                parentnode.ChildNodes.Add(jul)
                                jul.Collapse()
                            Case 8
                                Dim grandchildnode As New TreeNode(dr("newsec_title"), dr("newsec_id"))
                                aug.ChildNodes.Add(grandchildnode)
                                parentnode.ChildNodes.Add(aug)
                                aug.Collapse()
                            Case 9
                                Dim grandchildnode As New TreeNode(dr("newsec_title"), dr("newsec_id"))
                                sep.ChildNodes.Add(grandchildnode)
                                parentnode.ChildNodes.Add(sep)
                                sep.Collapse()
    
                            Case 10
                                Dim grandchildnode As New TreeNode(dr("newsec_title"), dr("newsec_id"))
                                oct.ChildNodes.Add(grandchildnode)
                                parentnode.ChildNodes.Add(oct)
                                oct.Collapse()
                            Case 11
                                Dim grandchildnode As New TreeNode(dr("newsec_title"), dr("newsec_id"))
                                nov.ChildNodes.Add(grandchildnode)
                                parentnode.ChildNodes.Add(nov)
                                nov.Collapse()
                            Case 12
                                Dim grandchildnode As New TreeNode(dr("newsec_title"), dr("newsec_id"))
                                dec.ChildNodes.Add(grandchildnode)
                                parentnode.ChildNodes.Add(dec)
                                dec.Collapse()
    
                        End Select
    End If
                    parentnode.Expand()
                Next

    Thursday, September 27, 2012 9:48 AM

Answers

  • SS,

    I have created a "simulation" of what you're trying to do - create TreeNodes showing the dates in logical order. In mine I'm creating a List(Of Date) and putting 15 randomly selected dates in it, then using a bit of LINQ to help do the rest.

    I have the code on a page of my website here and following shows the result:

    I hope that might give you some ideas of you might do this. :)

    Please call me Frank :)

    • Proposed as answer by Mark Liu-lxf Friday, September 28, 2012 2:48 AM
    • Marked as answer by Mark Liu-lxf Monday, October 8, 2012 1:00 PM
    Thursday, September 27, 2012 2:53 PM