解决方案1

您可以使用FormattedText来测量文本的大小，这是一个示例：

String text = "Here is my text";
Typeface myTypeface = new Typeface("Helvetica");
FormattedText ft = new FormattedText(text, CultureInfo.CurrentCulture, 
        FlowDirection.LeftToRight, myTypeface, 16, Brushes.Red);

Size textSize = new Size(ft.Width, ft.Height);

解决方案2

使用Graphics类（找到here）：

System.Drawing.Font font = new System.Drawing.Font("Calibri", 12, FontStyle.Bold);
Bitmap bitmap = new Bitmap(1, 1);
Graphics g = Graphics.FromImage(bitmap);
SizeF measureString = g.MeasureString(text, font);

你在这里！

Answer 2

没有指定高度或宽度的文本块会自动扩展，直到它们为止填满他们的容器。所以试试吧。

Answer 3

这是我编写的一个课程。它只是AutoShrinks，但您可以添加所需的功能。如果已设置，则使用父边界OR MaxHeight / MaxWidth。

public class TextBlockAutoShrink : TextBlock
{
    // private Viewbox _viewBox;
    private double _defaultMargin = 6;
    private Typeface _typeface;

    static TextBlockAutoShrink()
    {
        TextBlock.TextProperty.OverrideMetadata(typeof(TextBlockAutoShrink), new FrameworkPropertyMetadata(new PropertyChangedCallback(TextPropertyChanged)));
    }

    public TextBlockAutoShrink() : base() 
    {
        _typeface = new Typeface(this.FontFamily, this.FontStyle, this.FontWeight, this.FontStretch, this.FontFamily);
        base.DataContextChanged += new DependencyPropertyChangedEventHandler(TextBlockAutoShrink_DataContextChanged);
    }

    private static void TextPropertyChanged(DependencyObject sender, DependencyPropertyChangedEventArgs args)
    {
        var t = sender as TextBlockAutoShrink;
        if (t != null)
        {
            t.FitSize();
        }
    }

    void TextBlockAutoShrink_DataContextChanged(object sender, DependencyPropertyChangedEventArgs e)
    {
        FitSize();
    }

    protected override void OnRenderSizeChanged(SizeChangedInfo sizeInfo)
    {
        FitSize();

        base.OnRenderSizeChanged(sizeInfo);
    }

    private void FitSize()
    {
        FrameworkElement parent = this.Parent as FrameworkElement;
        if (parent != null)
        {
            var targetWidthSize = this.FontSize;
            var targetHeightSize = this.FontSize;

            var maxWidth = double.IsInfinity(this.MaxWidth) ? parent.ActualWidth : this.MaxWidth;
            var maxHeight = double.IsInfinity(this.MaxHeight) ? parent.ActualHeight : this.MaxHeight;

            if (this.ActualWidth > maxWidth)
            {
                targetWidthSize = (double)(this.FontSize * (maxWidth / (this.ActualWidth + _defaultMargin)));
            }

            if (this.ActualHeight > maxHeight)
            {
                var ratio = maxHeight / (this.ActualHeight);

                // Normalize due to Height miscalculation. We do it step by step repeatedly until the requested height is reached. Once the fontsize is changed, this event is re-raised
                // And the ActualHeight is lowered a bit more until it doesnt enter the enclosing If block.
                ratio = (1 - ratio > 0.04) ? Math.Sqrt(ratio) : ratio;

                targetHeightSize = (double)(this.FontSize *  ratio);
            }

            this.FontSize = Math.Min(targetWidthSize, targetHeightSize);
        }
    }
}

Answer 4

以下是解决此问题的另一种方法。

设置yourTextBlock.Width = double.NaN，与Height相同。

Answer 5

默认情况下，元素的HorizontalAligment和VerticalAligment属性设置为Stretch，因此它们将适应其父级。

但是，如果将它们设置为Center，则该元素将保持其自然大小，因此您可以对此进行测试（或使用代码而非XAML设置属性）：

<TextBlock Text="This is my text"
      HorizontalAlignment="Center"
      VerticalAlignment="Center"
/>

在我的情况下可能奏效，也许并非在每种情况下都行。

如何使wpf文本块自动调整大小

5 个答案:

解决方案1

解决方案2

如何使wpf文本块自动调整大小

5 个答案:

解决方案1 ​​

解决方案2

解决方案1