启用按钮，如果列表视图项检查

如何启用一个按钮，如果一个项目在列表视图中选中？我已经尝试过这个并且摆弄它，但没有运气。谁能帮忙？启用按钮，如果列表视图项检查

Private Sub lvCustomers_SelectedIndexChanged(sender As Object, e As EventArgs) Handles lvCustomers.SelectedIndexChanged 
    For Each x As ListViewItem In lvCustomers.Items 
     If x.Checked Then 
      btnConfirmOrder.Enabled = True 
     ElseIf x.Checked = False Then 
      btnConfirmOrder.Enabled = False 
     End If 
    Next 
End Sub

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2017-06-16 Jamie

你的“运气”跑了出来，因为你是循环theru所有这些使按键只会反映最后一项的结果。请阅读[问]并参加[旅游] – Plutonix

您如何绑定到XAML？请显示更多代码。 –

我会把它放在ItemChecked事件中，以便它在点击复选框时触发代码。我也只是基于它的checkeditems集合的数量大于0.（假设这是winforms，并且您希望在检查复选框时发生结果） –

下面是一个使用我在我的评论描述事件和收集的例子

Private Sub ListView1_ItemChecked(sender As Object, e As ItemCheckedEventArgs) Handles lvCustomers.ItemChecked 
    'checkeditems collection keeps track of only items that are checked 
    'if a single item is checked lvCustomer.CheckedItems.Count > 0 
    'becomes true and therefore the button is enabled. This event 
    'will respond with any check or uncheck of a checkbox in the LV 
    btnConfirmOrder.Enabled = lvCustomers.CheckedItems.Count > 0 
End Sub

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2017-06-16 17:09:58

令人惊叹！谢谢 – Jamie

Private Sub lvCustomers_SelectedIndexChanged(sender As Object, e As EventArgs) Handles lvCustomers.SelectedIndexChanged 
    btnConfirmOrder.Enabled = lvCustomers.Items.Any(Function(x) x.Checked) 
End Sub

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2017-06-16 17:02:12

启用按钮，如果列表视图项检查

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