WPF编程，TextBlock中的文字修饰线（上划线，中划线，基线与下划线）的使用方法。

参考地址：https://blog.csdn.net/johnsuna/article/details/1895169

效果：

从上至下，分别为上划线（Overline)，中划线(StrikeThrough)，基线(Baseline)，下划线(Underline)。

1、 简单设置

<TextBlock TextDecorations="Strikethrough" Text="文字"/>

?C#后台设置：

textBlock1.TextDecorations = TextDecorations.Underline;

textBlock1为控件TextBlock的名称?

2、调整下划线与文字的距离

        <TextBlock FontSize="84"
                   Text="文字">
            <TextBlock.TextDecorations>
                <TextDecorationCollection>
                        <TextDecoration PenOffset="3" />
                    </TextDecorationCollection>
            </TextBlock.TextDecorations>
        </TextBlock>

3、为文字加双下划线

        <TextBlock FontSize="84"
                   Text="文字">
            <TextBlock.TextDecorations>
                <TextDecorationCollection>
                    <TextDecoration PenOffset="1" />
                    <TextDecoration PenOffset="3" />
                </TextDecorationCollection>
            </TextBlock.TextDecorations>
        </TextBlock>

4、下划线的颜色与厚度

        <TextBlock FontSize="84"
                   Text="文字">
            <TextBlock.TextDecorations>
                <TextDecoration PenOffset="10"
                                PenOffsetUnit="Pixel"
                                PenThicknessUnit="Pixel">
                    <TextDecoration.Pen>
                        <Pen Thickness="5"
                             Brush="Green" />
                    </TextDecoration.Pen>
                </TextDecoration>
            </TextBlock.TextDecorations>
        </TextBlock>

5、下划线的渐变色

        <TextBlock FontSize="84"
                   Text="文字">
            <TextBlock.TextDecorations>
                <TextDecoration PenOffset="10"
                                PenOffsetUnit="Pixel"
                                PenThicknessUnit="Pixel">
                    <TextDecoration.Pen>
                        <Pen Thickness="5">
                            <Pen.Brush>
                                <LinearGradientBrush Opacity="0.8"
                                                     StartPoint="0,0.5"
                                                     EndPoint="1,0.5">
                                    <LinearGradientBrush.GradientStops>
                                        <GradientStop Color="Yellow"
                                                      Offset="0" />
                                        <GradientStop Color="Red"
                                                      Offset="1" />
                                    </LinearGradientBrush.GradientStops>
                                </LinearGradientBrush>
                            </Pen.Brush>
                            <Pen.DashStyle>
                                <DashStyle Dashes="1,2,3" />
                            </Pen.DashStyle>
                        </Pen>
                    </TextDecoration.Pen>
                </TextDecoration>
            </TextBlock.TextDecorations>
        </TextBlock>

C#后台实现：（此部分作者：大可山人）

    TextDecoration myUnderline = new TextDecoration();
??? Pen myPen = new Pen();
??? myPen.Brush = new LinearGradientBrush(Colors.Yellow, Colors.Red, new Point(0, 0.5), new Point(1, 0.5));
??? myPen.Brush.Opacity = 0.8;
??? myPen.Thickness = 5;
??? myPen.DashStyle = DashStyles.Dash;
??? myUnderline.Pen = myPen;
??? myUnderline.PenThicknessUnit = TextDecorationUnit.FontRecommended;

??? TextDecorationCollection myCollection = new TextDecorationCollection();
??? myCollection.Add(myUnderline);
??? textBlockGood.TextDecorations = myCollection;
 

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