我无法弄清楚: - 如何捕获 4 次按钮点击并检查它们是否匹配正确的顺序,类似于输入 4 位 ATM 借记卡 PIN 码
我有一个 WPF 应用程序并添加了一个新窗口,该窗口有一个 PIN 键盘、数字 0-9、一个问号按钮(用作帮助按钮)、一个退格按钮(以防您单击了错误的数字)、一个 TextBox顶部显示一个点而不是数字(Wingdings - 字母“l”),以及一个隐藏的 TextBlock,如果没有按正确的顺序输入数字,则会显示不正确的 PIN 消息。目前,我只是硬编码 4 位 PIN(例如 7410),因为我的主要目标是学习如何捕获和验证按钮单击序列。由于我不会使用 Enter 键按钮,因此我想在单击最后一个数字并且顺序正确后立即继续到下一页,否则会显示 PIN 不正确的通知消息。
我猜我需要一个在每次单击按钮时调用的方法,该方法跟踪序列并每次循环返回,直到以正确的顺序单击所有 4 个数字,然后转到下一页。对不起,如果我解释得不好,还在学习,所以如果你需要更多细节,我会尽力提供更多。
先感谢您。
下面是密码键盘的 xaml 代码。
<Border BorderThickness="1" BorderBrush="Black">
<Grid>
<Grid.RowDefinitions>
<RowDefinition />
<RowDefinition Height="Auto" />
<RowDefinition />
<RowDefinition />
<RowDefinition />
<RowDefinition />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition />
<ColumnDefinition />
<ColumnDefinition />
</Grid.ColumnDefinitions>
<Border Background="Black" Height="50" Grid.ColumnSpan="3" VerticalAlignment="Stretch" HorizontalAlignment="Stretch">
<TextBlock x:Name="PINTextBlock" Foreground="White" FontSize="18" FontFamily="Wingdings" VerticalAlignment="Center" HorizontalAlignment="Center" MaxWidth="4" />
</Border>
<TextBlock x:Name="ErrorMessageTextBlock" Foreground="Red" Visibility="Collapsed" Grid.ColumnSpan="3" Grid.Row="1" />
<StackPanel Orientation="Horizontal" Grid.Row="2">
<Button x:Name="SevenButton" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Width="50" Height="50" Click="SevenButton_Click" TabIndex="9">
<TextBlock Text="7" FontSize="24" FontWeight="Bold" />
</Button>
<Button x:Name="EightButton" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Width="50" Height="50" Click="EightButton_Click" TabIndex="10">
<TextBlock Text="8" FontSize="24" FontWeight="Bold" />
</Button>
<Button x:Name="NineButton" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Width="50" Height="50" Click="NineButton_Click" TabIndex="11">
<TextBlock Text="9" FontSize="24" FontWeight="Bold" />
</Button>
</StackPanel>
<StackPanel Orientation="Horizontal" Grid.Row="3">
<Button x:Name="FourButton" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Width="50" Height="50" Click="FourButton_Click" TabIndex="6">
<TextBlock Text="4" FontSize="24" FontWeight="Bold" />
</Button>
<Button x:Name="FiveButton" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Width="50" Height="50" Click="FiveButton_Click" TabIndex="7">
<TextBlock Text="5" FontSize="24" FontWeight="Bold" />
</Button>
<Button x:Name="SixButton" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Width="50" Height="50" Click="SixButton_Click" TabIndex="8">
<TextBlock Text="6" FontSize="24" FontWeight="Bold" />
</Button>
</StackPanel>
<StackPanel Orientation="Horizontal" Grid.Row="4">
<Button x:Name="OneButton" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Width="50" Height="50" Click="OneButton_Click" TabIndex="3">
<TextBlock Text="1" FontSize="24" FontWeight="Bold" />
</Button>
<Button x:Name="TwoButton" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Width="50" Height="50" Click="TwoButton_Click" TabIndex="4">
<TextBlock Text="2" FontSize="24" FontWeight="Bold" />
</Button>
<Button x:Name="ThreeButton" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Width="50" Height="50" Click="ThreeButton_Click" TabIndex="5">
<TextBlock Text="3" FontSize="24" FontWeight="Bold" />
</Button>
</StackPanel>
<StackPanel Orientation="Horizontal" Grid.Row="5">
<Button x:Name="QuestionMarkButton" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Width="50" Height="50" Click="QuestionMarkButton_Click" TabIndex="0">
<TextBlock Text="?" FontSize="24" FontWeight="Bold" />
</Button>
<Button x:Name="ZeroButton" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Width="50" Height="50" Click="ZeroButton_Click" TabIndex="1">
<TextBlock Text="0" FontSize="24" FontWeight="Bold" />
</Button>
<Button x:Name="BackspaceButton" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Width="50" Height="50" Click="BackspaceButton_Click" TabIndex="2">
<TextBlock Text="Õ" FontFamily="Wingdings" FontSize="24" FontWeight="Bold" />
</Button>
</StackPanel>
</Grid>
</Border>