实施例

Question

我有一个带有TextBox的WPF用户控件。我是否设置了文本Underline，不设置Strikethrough。

我认为我的代码有问题，特别是未设置部分，因为每次都无法正常工作...可能会删除下划线的某些元素并使用删除线？...

特别是当将相同的属性多次设置为相同的值时，它会添加并添加....

private void UpdateUnderline()
{
    if (this.IsUnderline)
    {
        this.MyTextBlock.TextDecorations.Add(TextDecorations.Underline);
    }
    else
    {
        foreach (var item in TextDecorations.Underline)
        {
            this.MyTextBlock.TextDecorations.Remove(item);
        }
    }
}

private void UpdateStrikethrough()
{
    if (this.IsStrikethrough)
    {
        this.MyTextBlock.TextDecorations.Add(TextDecorations.Strikethrough);
    }
    else
    {
        foreach (var item in TextDecorations.Strikethrough)
        {
            this.MyTextBlock.TextDecorations.Remove(item);
        }
    }
}

因为我做不到

this.MyTextBlock.TextDecorations.Contains(TextDecorations.Strikethrough);

它添加并添加，并再次添加，所以当它删除时......它仍然是：）

实施例

<Window x:Class="WpfApplication10.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <StackPanel>
            <CheckBox Content="Underline"
                      IsChecked="{Binding IsUnderline}" />
            <CheckBox Content="Strikethrough"
                      IsChecked="{Binding IsStrikethrough}" />
            <TextBlock Name="MyTextBlock"
                       Text="Quick Brown Fox Jumps Over The Lazy Dog." />
            <Button Content="Underline" Name="Underline" Click="Underline_Click"/>
            <Button Content="Strikethrough" Name="Strikethrough" Click="Strikethrough_Click"/>
            <Button Content="NO Underline" Name="NoUnderline" Click="NoUnderline_Click"/>
            <Button Content="NO Strikethrough" Name="NoStrikethrough" Click="NoStrikethrough_Click" />
        </StackPanel>
    </Grid>
</Window>

CS：

public partial class MainWindow : Window
{
    public MainWindow()
    {
        DataContext = this;
    }

    private Boolean _IsUnderline;
    public Boolean IsUnderline
    {
        get
        {
            return _IsUnderline;
        }
        set
        {
            _IsUnderline = value;
            UpdateUnderline();
        }
    }
    private Boolean _IsStrikethrough;
    public Boolean IsStrikethrough
    {
        get
        {
            return _IsStrikethrough;
        }
        set
        {
            _IsStrikethrough = value;
            UpdateStrikethrough();
        }
    }

    private void UpdateUnderline()
    {
        if (this.IsUnderline)
        {
            this.MyTextBlock.TextDecorations.Add(TextDecorations.Underline);
        }
        else
        {
            foreach (var item in TextDecorations.Underline)
            {
                this.MyTextBlock.TextDecorations.Remove(item);
            }
        }
    }

    private void UpdateStrikethrough()
    {
        if (this.IsStrikethrough)
        {
            this.MyTextBlock.TextDecorations.Add(TextDecorations.Strikethrough);
        }
        else
        {
            foreach (var item in TextDecorations.Strikethrough)
            {
                this.MyTextBlock.TextDecorations.Remove(item);
            }
        }
    }

    private void Underline_Click(object sender, RoutedEventArgs e)
    {
        IsUnderline = true;
    }

    private void Strikethrough_Click(object sender, RoutedEventArgs e)
    {
        IsStrikethrough = true;
    }

    private void NoUnderline_Click(object sender, RoutedEventArgs e)
    {
        IsUnderline = false;
    }

    private void NoStrikethrough_Click(object sender, RoutedEventArgs e)
    {
        IsStrikethrough = false;
    }
}

Answer 1

“脏”解决方案：

    private void UpdateUnderline()
    {
        if (this.IsUnderline)
        {
            foreach (var item in TextDecorations.Underline)
            {
                this.MyTextBlock.TextDecorations.Remove(item);
            }
            this.MyTextBlock.TextDecorations.Add(TextDecorations.Underline);
        }
        else
        {
            foreach (var item in TextDecorations.Underline)
            {
                this.MyTextBlock.TextDecorations.Remove(item);
            }
        }
    }

Answer 2

我重新创建它并且工作正常：

娱乐：

XAML：

<Window x:Class="WpfApplication1.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow"
        Height="350"
        Width="525">
    <Grid>
        <StackPanel>
            <CheckBox Content="Underline"
                      IsChecked="{Binding IsUnderline}" />
            <CheckBox Content="Strikethrough"
                      IsChecked="{Binding IsStrikethrough}" />
            <TextBlock Name="MyTextBlock"
                       Text="Quick Brown Fox Jumps Over The Lazy Dog." />
        </StackPanel>
    </Grid>
</Window>

代码背后：

public partial class MainWindow : Window
{
    public MainWindow()
    {
        DataContext = this;
    }

    private Boolean _IsUnderline;
    public Boolean IsUnderline
    {
        get
        {
            return _IsUnderline;
        }
        set
        {
            _IsUnderline = value;
            UpdateUnderline();
        }
    }
    private Boolean _IsStrikethrough;
    public Boolean IsStrikethrough
    {
        get
        {
            return _IsStrikethrough;
        }
        set
        {
            _IsStrikethrough = value;
            UpdateStrikethrough();
        }
    }

    private void UpdateUnderline()
    {
        if (this.IsUnderline)
        {
            this.MyTextBlock.TextDecorations.Add(TextDecorations.Underline);
        }
        else
        {
            foreach (var item in TextDecorations.Underline)
            {
                this.MyTextBlock.TextDecorations.Remove(item);
            }
        }
    }

    private void UpdateStrikethrough()
    {
        if (this.IsStrikethrough)
        {
            this.MyTextBlock.TextDecorations.Add(TextDecorations.Strikethrough);
        }
        else
        {
            foreach (var item in TextDecorations.Strikethrough)
            {
                this.MyTextBlock.TextDecorations.Remove(item);
            }
        }
    }
}

WPF中的下划线文本

实施例

2 个答案:

娱乐：