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利用Asp.net 动态创建DataList

作者:未知 来源:月光软件站 加入时间:2005-2-28 月光软件站

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        'Put user code to initialize the page here
        Dim dl As New DataList
        dl.HeaderTemplate = New CreateDL(ListItemType.Header)
        dl.ItemTemplate = New CreateDL(ListItemType.Item)
        dl.AlternatingItemTemplate = New CreateDL(ListItemType.AlternatingItem)
        dl.FooterTemplate = New CreateDL(ListItemType.Footer)
        Dim d As New Data
        dl.DataSource = d.getTree
        dl.DataBind()
        div1.Controls.Add(dl)

    End Sub

 

Public Class CreateDL
    Implements ITemplate
    Shared itemcount As Integer = 0
    Dim TemplateType As ListItemType

    Sub New(ByVal type As ListItemType)
        TemplateType = type
    End Sub

    Sub InstantiateIn(ByVal container As Control) Implements ITemplate.InstantiateIn
        Dim lc As New Literal
        Select Case TemplateType
            Case ListItemType.Header
                lc.Text = "<TABLE border=1><TR><TH>Items</TH></TR>"
            Case ListItemType.Item
                lc.Text = "<TR><TD>Item number: " '& itemcount.ToString & "</TD></TR>"
                AddHandler lc.DataBinding, AddressOf TemplateControl_Databinding
            Case ListItemType.AlternatingItem
                lc.Text = "<TR><TD bgcolor=lightblue>Item number: " _
                   & itemcount.ToString & "</TD></TR>"
            Case ListItemType.Footer
                lc.Text = "</TABLE>"
        End Select
        container.Controls.Add(lc)
        itemcount += 1
    End Sub
    Private Sub TemplateControl_DataBinding(ByVal sender As Object, _
       ByVal e As System.EventArgs)
        Dim lc As Literal
        lc = CType(sender, Literal)
        Dim container As DataListItem
        container = CType(lc.NamingContainer, DataListItem)
        lc.Text &= DataBinder.Eval(container.DataItem, "text")
        lc.Text &= "</TD></TR>"
    End Sub


End Class




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