WPF - FlowDocument - 将表拉伸到整个宽度？

我有一个包含任意数量的列和行的数据表，我正在尝试打印它们。到目前为止，我所拥有的最好的运气是将数据放入表中，然后将该表添加到 FlowDocument 中。

到目前为止，一切都很好。我现在遇到的问题是表格只“想要”占据文档宽度的大约一半。我已经为 FlowDocument 的 PageWidth 和 ColumnWidth 属性设置了适当的值，但表似乎不想拉伸以填充分配的空间？

为了将 FlowDocument 内容设置为完整可用宽度，您必须首先知道页面的宽度。您需要设置的负责内容长度的属性是列宽FlowDocument 上的 prop。

我通常创建一个“打印布局”帮助程序类来保留页面宽度/高度和填充的已知预设。您可以从 Ms Word 中嗅探预设并填充更多。

PrintLayout 的类

public class PrintLayout
{
    public static readonly PrintLayout A4 = new PrintLayout("29.7cm", "42cm", "3.18cm", "2.54cm");
    public static readonly PrintLayout A4Narrow = new PrintLayout("29.7cm", "42cm", "1.27cm", "1.27cm");
    public static readonly PrintLayout A4Moderate = new PrintLayout("29.7cm", "42cm", "1.91cm", "2.54cm");

    private Size _Size;
    private Thickness _Margin;

    public PrintLayout(string w, string h, string leftright, string topbottom) 
        : this(w,h,leftright, topbottom, leftright, topbottom) {
    }

    public PrintLayout(string w, string h, string left, string top, string right, string bottom) {
        var converter = new LengthConverter();
        var width = (double)converter.ConvertFromInvariantString(w);
        var height = (double)converter.ConvertFromInvariantString(h);
        var marginLeft = (double)converter.ConvertFromInvariantString(left);
        var marginTop = (double)converter.ConvertFromInvariantString(top);
        var marginRight = (double)converter.ConvertFromInvariantString(right);
        var marginBottom = (double)converter.ConvertFromInvariantString(bottom);
        this._Size = new Size(width, height);
        this._Margin = new Thickness(marginLeft, marginTop, marginRight, marginBottom);

    }


    public Thickness Margin {
        get { return _Margin; }
        set { _Margin = value; }
    }

    public Size Size {
        get { return _Size; }
    }

    public double ColumnWidth {
        get {
            var column = 0.0;
            column = this.Size.Width - Margin.Left - Margin.Right;
            return column;
        }
    }
}

接下来，您可以在 FlowDocument 上设置预设

On Xaml

<FlowDocument x:Class="WpfApp.MyPrintoutView"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
         xmlns:local="clr-namespace:WpfApp"
         mc:Ignorable="d" 
         PageHeight="{Binding Height, Source={x:Static local:PrintLayout.A4}}"
         PageWidth="{Binding Width, Source={x:Static local:PrintLayout.A4}}"
         PagePadding="{Binding Margin, Source={x:Static local:PrintLayout.A4}}"
         ColumnWidth="{Binding ColumnWidth, Source={x:Static local:PrintLayout.A4}}"
         FontFamily="Segoe WP"
         FontSize="16" ColumnGap="4">
      <!-- flow elements -->
</FlowDocument>

By code

FlowDocument result = new WpfApp.MyPrintoutView();   
result.PageWidth = PrintLayout.A4.Size.Width;
result.PageHeight = PrintLayout.A4.Size.Height;
result.PagePadding = PrintLayout.A4.Margin;
result.ColumnWidth = PrintLayout.A4.ColumnWidth;