Question

我正在尝试基于列表视图中选中复选框的值（是/否）修改XML文件，因此我需要一个已用复选框的索引。问题是，每当我选中或取消选中复选框时，使用ListView.FocusedItem.Index时都会得到相同的结果，因为未选中单击复选框时。

是否可以获取列表视图中当前使用的复选框的索引？

Answer 1

在ListView ItemCheck事件中检查e.Index。这是我如何使用此示例。

Private Sub lvCoffee_ItemCheck(ByVal sender As Object, ByVal e As ItemCheckEventArgs) Handles lvCoffee.ItemCheck
        ' e.Current state - the state before the click
        ' e.New State - after the click
        'While the ListView loads the check boxes, keep the update code from running
        If LoadingChecks Then
            Exit Sub
        End If
        'This code runs BEFORE the check mark changes
        'Hence the use of e.NewValue
        Dim bolFav As Boolean
        If e.NewValue = CheckState.Checked Then
            bolFav = True
        Else
            bolFav = False
        End If
        Cursor.Current = Cursors.WaitCursor
        Try
            'I store the primary key value in the Tag property of the ListViewItem
            DataAccess.UpdateFavorites(CInt(lvCoffee.Items(e.Index).Tag), bolFav)
        Catch ex As Exception
            MessageBox.Show($"The change to {lvCoffee.Items(e.Index).SubItems(1).Text} failed.{vbCrLf}{ex.Message}", "Favorites change Failed", MessageBoxButtons.OK, MessageBoxIcon.Error)
        Finally
            Cursor.Current = Cursors.Default
        End Try
    End Sub

列表视图中已选中/未选中复选框的索引

1 个答案: