Question

这里是将我的lvList克隆到我的LvPrint的代码我的问题是如何避免重复或防止重复帮助

    Dim lvi, lvi2 As New ListViewItem
                    If lvList.SelectedItems.Count > 0 Then
                        For i As Integer = 0 To lvList.SelectedItems.Count - 1
                            lvi = lvList.SelectedItems(i)
                            lvi2 = CType(lvi.Clone, ListViewItem)
                            lvPrint.Items.Add(lvi2)
                        Next
                    End If

Answer 1

验证以下内容，添加额外if条件以检查lvprint中已有的选定字符串

Dim lvi, lvi2 As New ListViewItem
    Dim list As String = ""
    Dim printlist As String = ""
    For j As Integer = 0 To lvPrint.Items.Count - 1
        printlist = printlist & " " & lvPrint.Items(j).Text
    Next
    If lvList.SelectedItems.Count > 0 Then
        For i As Integer = 0 To lvList.SelectedItems.Count - 1
            lvi = lvList.SelectedItems(i)

            If Not list.Contains(lvi.Text) And Not printlist.Contains(lvi.Text) Then
                lvi2 = CType(lvi.Clone, ListViewItem)
                lvPrint.Items.Add(lvi2)
            End If
            list = list & " " & lvi.Text

        Next
    End If

vb.net避免listview重复

1 个答案: