Question

尝试在itemDatabound期间访问listview中的上一个项目，但它不返回任何内容。实际上，lvListview.items.count显示为0;即使记录显然在那里。

谢谢你的任何帮助。：）

Protected Sub lvReleaseNotesReport_ItemDataBound(sender As Object, e As ListViewItemEventArgs) Handles lvReleaseNotesReport.ItemDataBound

    If e.Item.ItemType = ListViewItemType.DataItem Then

        Dim relNote As ReleaseNotesDTO = DirectCast(e.Item.DataItem, ReleaseNotesDTO)
        If e.Item.DataItemIndex > 0 Then
            Dim prevNote As ReleaseNotesDTO = DirectCast(lvReleaseNotesReport.Items(e.Item.DataItemIndex - 1).DataItem, ReleaseNotesDTO)
            'prevNote keeps coming up as Nothing
        End If

        'do other stuff with relNote and prevNote...

    End If

End Sub

也试过这个，......

Protected Sub lvReleaseNotesReport_PreRender(sender As Object, e As EventArgs) Handles lvReleaseNotesReport.PreRender

    For Each item As ListViewItem In lvReleaseNotesReport.Items

        If item.ItemType = ListViewItemType.DataItem Then

            If item.DataItemIndex > 0 Then

                Dim thisNote As ReleaseNotesDTO = DirectCast(item.DataItem, ReleaseNotesDTO)
                Dim prevItem As ListViewDataItem = lvReleaseNotesReport.Items(item.DataItemIndex - 1)
                Dim prevNote As ReleaseNotesDTO = DirectCast(prevItem.DataItem, ReleaseNotesDTO)

                'do other stuff with relNote and prevNote...

            End If

        End If

    Next

End Sub

在单步执行代码时，鼠标悬停在lvReleaseNotesReport.Items上会显示正确的记录计数，但所有数据项都是=无。

Answer 1

非常感谢，我明白了。 DataKeyNames和DataKeys索引。

{{dataProperty}} <input type="text" [ngModel]="dataProperty"></input>

访问itemdatabound中的上一个ListViewDataItem

1 个答案: