Question

我有一组XAML元素，如下所示：

<ComboBox x:Name="comB1" HorizontalAlignment="Left" Margin="244,90,0,0" VerticalAlignment="Top" Width="130" Height="48" Visibility="Collapsed">
<ComboBox x:Name="comB2" HorizontalAlignment="Left" Margin="244,180,0,0" VerticalAlignment="Top" Width="130" Height="48" Visibility="Collapsed">
<ComboBox x:Name="comB3" HorizontalAlignment="Left" Margin="244,270,0,0" VerticalAlignment="Top" Width="130" Height="48" Visibility="Collapsed">


<Button Content="+" HorizontalAlignment="Left" Margin="171,224,0,0" VerticalAlignment="Top" Height="51" Width="59" Click="Button_Click"/>

我想在每次单击此Visibility按钮后将ComboBox的{{1}}更改为visible。

Answer 1

此解决方案适用于ComboBoxes的任何计数。试试这个：

int num = 1;

private void Button_Click(object sender, RoutedEventArgs e)
{
    if (num <= ComboCounts)//ComboCounts is count of your ComboBoxes
    {
        ((ComboBox)this.FindName("comB" + num)).Visibility = Visibility.Visible;
        num++;
    }
}

Answer 2

int ComboNO = 0;
private void Button_Click(object sender, System.Windows.RoutedEventArgs e)
{
     ComboNO++;
     for (int i = 0; i < ComboCount; i++)
        if (ComboNO == i)
          foreach (FrameworkElement item in RootElement.Children)
             if (item.Name == "comB" + i) item.Visibility = Visibility.Visible;
}

Answer 3

这是一个技巧：

- 在类

的范围内声明一个变量

int numOfVisibleCbx = 0;

- 点击按钮

if(numOfVisibleCbx == 0)
      comB1.Visibility = Visibility.Visible;
else if(numOfVisibleCbx == 1)
      comB2.Visibility = Visibility.Visible;
else if(numOfVisibleCbx == 2)
      comB3.Visibility = Visibility.Visible;

numOfVisibleCbx++;

Answer 4

如果你想隐藏其他cbx，那么

这是一个技巧：

- 在类

的范围内声明一个变量

int numOfVisibleCbx = 0;

- 功能

void hideAll()
{
     comB1.Visibility = Visibility.Hidden;
     comB2.Visibility = Visibility.Hidden;
     comB3.Visibility = Visibility.Hidden;
}

- 点击按钮

hideAll();
if(numOfVisibleCbx == 0)
      comB1.Visibility = Visibility.Visible;
else if(numOfVisibleCbx == 1)
      comB2.Visibility = Visibility.Visible;
else if(numOfVisibleCbx == 2){
      comB3.Visibility = Visibility.Visible; 
      numOfVisibleCbx = 0;
}
numOfVisibleCbx++;

Answer 5

尝试一下：

    public MainWindow()
    {
        InitializeComponent();
        _comBs =
            this
                .Root
                .Children
                .OfType<ComboBox>()
                .Where(x => x.Name.StartsWith("comB"))
                .OrderBy(x => int.Parse(x.Name.Substring("comB".Length)))
                .ToArray();
    }

    private ComboBox[] _comBs = null;
    private int _comB_index = -1;

    private void Button_Click(object sender, RoutedEventArgs e)
    {
        _comB_index++;
        for (var i = 0; i < _comBs.Length; i++)
        {
            _comBs[i].Visibility = i == _comB_index % _comBs.Length
                ? Visibility.Visible
                : Visibility.Collapsed;
        }
    }

您必须将this.Root替换为容器元素。

我已经测试了这个解决方案，但它确实有效。

每次单击按钮后更改元素的可见性

5 个答案: