Question

我的代码在.cs文件中定义的函数调用上生成面板。代码中使用ItemControl来生成这些面板。每个小组都有Textbox，Slider和Combobox。

每个Panel的Slider和Combobox正在使用TextBox.Text，如：

滑块以增加Textbox.Text字体大小。
Combobox选择TextBox.Text的对齐方式。

我想用内容为Left的Button替换Combobox。因此，当我点击按钮时，其内容必须更改为Right，类似地从Right更改为Left。，以对Alignment进行更改。

任何人都可以解决我的问题吗？这里的代码是：

XAML文件：

<ItemsControl x:Name="lstItemsClassM" >
        <ItemsControl.ItemTemplate>
            <DataTemplate>
                <StackPanel Orientation="Vertical">
                <ComboBox x:Name="cboOccupation" IsEditable="False" HorizontalAlignment="Left"
        Text="{Binding Path=Alignment, Mode=TwoWay}"
        Margin="4" Width="140">
                        <ComboBoxItem>Right</ComboBoxItem>
                        <ComboBoxItem>Left</ComboBoxItem>

                    </ComboBox>

                    <Button Content="{Binding Alignment, Mode=TwoWay}" Click="Button_Click" Tag="{Binding PKId}" SourceUpdated="Button_SourceUpdated" />
                    <TextBox x:Name="txtText" Width="300" Height="100" Text="{Binding Text;, Mode=TwoWay}" FontSize="{Binding FontSize, Mode=OneWay}" TextAlignment="{Binding Alignment, Mode=OneWay}"  />
                    <Slider Minimum="10" Maximum="30" Value="{Binding FontSize, Mode=TwoWay}" />
                </StackPanel>
            </DataTemplate>
        </ItemsControl.ItemTemplate>
    </ItemsControl>

.cs文件

 public partial class Window2 : Window
{
    protected ObservableCollection<ClassM> texts = new ObservableCollection<ClassM>();
    int dv;
    public Window2()
    {
        InitializeComponent();
        dv=1;
        texts.Add(new ClassM() { PKId=dv, Text = "Test 1" });
        dv=2;
        texts.Add(new ClassM() { PKId=dv, Text = "Test 2" });

        lstItemsClassM.ItemsSource = texts;
    }

    private void Button_Click(object sender, RoutedEventArgs e)
    {
        var myValue = ((Button)sender).Tag;
      foreach (var f in texts.ToList())
            {
                if (f.PKId.ToString() == myValue.ToString())
                {
                    f._alignment = "Right";
                    MessageBox.Show(f._alignment);
                }
            }
    }

    private void Button_SourceUpdated(object sender, DataTransferEventArgs e)
    {
        var myValue = ((Button)sender).Tag;
       foreach (var f in texts.ToList())
        {
            if (f.PKId.ToString() == myValue.ToString())
            {
                f._alignment = "Right";
                MessageBox.Show(f._alignment);
            }
        }
    }


}


public class ClassM : INotifyPropertyChanged
{
    private string _id;
    private int _pkid;
    private string _text;
    private double _fontSize = 10;
    public bool _isChecked { get; set; }
    public string _alignment="Left";

    public int PKId
    {
        get { return _pkid; }
        set
        {
            if (value != _pkid)
            {
                _pkid = value;
                NotifyPropertyChanged();
            }
        }
    }
    public string Id
    {
        get { return _id; }
        set
        {
            if (value != _id)
            {
                _id = value;
                NotifyPropertyChanged();
            }
        }
    }

    public bool IsChecked
    {
        get { return _isChecked; }
        set
        {
            if (value != _isChecked)
            {
                _isChecked = value;
                NotifyPropertyChanged();
            }
        }
    }
    public string Text
    {
        get { return _text; }
        set
        {
            if (value != _text)
            {
                _text = value;
                NotifyPropertyChanged();
            }
        }
    }
    public double FontSize
    {
        get { return _fontSize; }
        set
        {
            if (value != _fontSize)
            {
                _fontSize = value;
                NotifyPropertyChanged();
            }
        }
    }
    public string Alignment
    {
        get { return _alignment; }
        set
        {
            if (value != _alignment)
            {
                _alignment = value;
                NotifyPropertyChanged();
            }
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;

    protected void NotifyPropertyChanged(String propertyName = "")
    {
        if (PropertyChanged != null)
        {
            PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
        }
    }
}

}

Answer 1

TextBox.TextAlignment属性的枚举类型为System.Windows.TextAlignment。

如果要绑定它而不必实现自己的值转换器，那么您希望使用实际的枚举值填充ComboBox，而不仅仅是具有相同名称的字符串，如“Left”和“Right”... < / p>

以下是如何使ComboBox代表TextAlignment：

<ComboBox>
    <ComboBox.Items>
        <TextAlignment>Left</TextAlignment>
        <TextAlignment>Right</TextAlignment>
    </ComboBox.Items>
</ComboBox>

现在，您可以将ComboBox的SelectedItem属性绑定到TextBox的TextAlignment属性。

或者在您的情况下，如果要将两者绑定到基础数据上下文，则需要更改此内容：

private string _alignment = "Left";

对此：

private TextAlignment _alignment = TextAlignment.Left;

如何用Button替换Combobox绑定

1 个答案: