WPF-FlowDocument的自动行号
本文关键字：WPF-FlowDocument | 更新日期: 2023-09-27 17:57:26
我刚刚开始为我当前的项目执行合同生成例程，其中一个要求是合同中的每一行都必须编号。编号应位于左边距，并用垂直规则将编号与文档内容的其余部分隔开。
我确信我可以用FixedDocument解决这个需求，但这不会很有趣。我是否可以用FlowDocument代替它？
您可以使用下面发布的WpfPrint助手类，很容易地使用FixedDocument来完成此操作。要将其用于XPS创建，只需使用XPS:的构造函数
WpfPrint printer = new WpfPrint(new Size(1024, 768));
printer.CurrentElementMargin = new Thickness(2, 2, 2, 2);
printer.CurrentFontFamily = new FontFamily("Arial");
printer.CurrentFontSize = BaseFontSize;
printer.MarginX = 24;
printer.MarginY = 24;
现在，您可以循环浏览并添加任何您想要的内容；TextBlocks很可能就是你想要的：
printer.AddTextBlock("Basics", printer.PageSizeUsed.Width, 0, WpfPrint.ElementFlags.NewLine | WpfPrint.ElementFlags.BottomCheck2);
如果你把它们包裹起来，它们就会把自己包裹起来；每一个项目在添加时都是经过测量的。如果它不适合页面，则helper类会添加一个新页面并将其流到新页面上，这样您就可以从FlowDocument中获得所需内容。放置项目时，可以随时更改CurX和CurY以跳过水平或垂直空间。当你完成后，你可以打印到这样的打印机：
// Print final document
XpsDocumentWriter xpsDocumentWriter = PrintQueue.CreateXpsDocumentWriter(dlg.PrintQueue);
xpsDocumentWriter.Write(printer.CurrentFixedDocument);
或者您可以另存为XPS文件：
using (XpsDocument doc = new XpsDocument(filename, FileAccess.Write))
{
XpsDocumentWriter xpsDocumentWriter = XpsDocument.CreateXpsDocumentWriter(doc);
xpsDocumentWriter.Write(printer.CurrentFixedDocument);
}
这是helper类。享受您再也不想使用FlowDocument了：-）
//****************************************************************************************
// WpfPrint
//
// Various helpers for printing WPF UI to a printer
//****************************************************************************************
using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Documents;
using System.Windows.Markup;
using System.Windows.Controls;
using System.Windows.Xps;
using System.Windows;
using System.Printing;
using System.Windows.Media;
namespace csheet
{
/// <summary>
/// Various helpers for printing WPF UI to a printer
/// </summary>
public class WpfPrint
{
#region Supporting Types
//****************************************************************************************
// Suporting Types
//****************************************************************************************
/// <summary>
/// Element flags define the way the elements print; OR them for multiple effects
/// </summary>
[Flags]
public enum ElementFlags
{
/// <summary>No special flags</summary>
None = 0,
/// <summary>Move to the next line after output</summary>
NewLine = 1,
/// <summary>if there isn't 2x room, then do new page first</summary>
BottomCheck2 = 2,
/// <summary>Center the item horizontally</summary>
HorzCenter = 4,
/// <summary>Right align the item (center overrides)</summary>
HorzRight = 8
}
#endregion Supporting Types
#region Data
//****************************************************************************************
// Data
//****************************************************************************************
FixedDocument _fixedDocument;
FixedPage _curFixedPage;
Canvas _curCanvas;
double _marginX;
double _marginY;
Size _infiniteSize = new Size(double.PositiveInfinity, double.PositiveInfinity);
#endregion Data
#region Properties
//****************************************************************************************
// Properties
//****************************************************************************************
/// <summary>Current font family used for known objects</summary>
public FontFamily CurrentFontFamily { get; set; }
/// <summary>Current font size used for known objects</summary>
public double CurrentFontSize { get; set; }
/// <summary>Current font weight used for known objects</summary>
public FontWeight CurrentFontWeight { get; set; }
/// <summary>Current font style used for known objects</summary>
public FontStyle CurrentFontStyle { get; set; }
/// <summary>Current margin for known objects</summary>
public Thickness CurrentElementMargin { get; set; }
/// <summary>Current background for known objects</summary>
public Brush CurrentElementBackground { get; set; }
/// <summary>Current foreground for known objects</summary>
public Brush CurrentElementForeground { get; set; }
/// <summary>Gets the current fixed document being worked on</summary>
public FixedDocument CurrentFixedDocument
{
get { return _fixedDocument; }
}
/// <summary>The current horizontal position</summary>
public double CurX { get; set; }
/// <summary>The current vertical position</summary>
public double CurY { get; set; }
/// <summary>The starting and ending X margins on the page</summary>
public double MarginX
{
get { return _marginX; }
set
{
if (value < 0)
value = 0;
_marginX = value;
if (CurX < _marginX)
CurX = _marginX;
}
}
/// <summary>The starting and ending Y margins on the page</summary>
public double MarginY
{
get { return _marginY; }
set
{
if (value < 0)
value = 0;
_marginY = value;
if (CurY < _marginY)
CurY = _marginY;
}
}
/// <summary>Gets the page size for the document minus the margins</summary>
public Size PageSizeUsed
{
get
{
Size sz = CurrentFixedDocument.DocumentPaginator.PageSize;
sz.Width -= 2 * _marginX;
sz.Height -= 2 * _marginY;
return sz;
}
}
#endregion Properties
#region Construction
//****************************************************************************************
// Construction
//****************************************************************************************
/// <summary>
/// Constructor for printing
/// </summary>
/// <param name="printQueue"></param>
/// <param name="printTicket"></param>
public WpfPrint(PrintQueue printQueue, PrintTicket printTicket)
{
PrintCapabilities capabilities = printQueue.GetPrintCapabilities(printTicket);
Size sz = new Size(capabilities.PageImageableArea.ExtentWidth, capabilities.PageImageableArea.ExtentHeight);
_fixedDocument = new FixedDocument();
_fixedDocument.DocumentPaginator.PageSize = sz;
StartPage();
}
/// <summary>
/// Constructor for XPS creation
/// </summary>
/// <param name="sz"></param>
public WpfPrint(Size sz)
{
_fixedDocument = new FixedDocument();
_fixedDocument.DocumentPaginator.PageSize = sz;
StartPage();
}
#endregion Construction
#region Interfaces
//****************************************************************************************
// Interfaces
//****************************************************************************************
/// <summary>
/// Add a new page to the document (start a new page)
/// </summary>
public void StartPage()
{
// Create a new page content and fixed page
PageContent content = new PageContent();
_fixedDocument.Pages.Add(content);
_curFixedPage = new FixedPage();
((IAddChild)content).AddChild(_curFixedPage);
// Create a new drawing canvas for the page
_curCanvas = new Canvas();
_curCanvas.Width = _fixedDocument.DocumentPaginator.PageSize.Width;
_curCanvas.Height = _fixedDocument.DocumentPaginator.PageSize.Height;
_curFixedPage.Children.Add(_curCanvas);
// Reset the current position
CurX = MarginX;
CurY = MarginY;
}
/// <summary>
/// Adds a new element at the current position, and updates the current position
/// </summary>
/// <param name="element">New element to add</param>
/// <param name="flags">Print options</param>
public void AddUIElement(UIElement element, ElementFlags flags)
{
element.Measure(_infiniteSize);
if (CurX > _fixedDocument.DocumentPaginator.PageSize.Width - MarginX)
{
CurY += element.DesiredSize.Height;
CurX = MarginX;
}
double extraCheck = 0;
if ((flags & ElementFlags.BottomCheck2) == ElementFlags.BottomCheck2)
extraCheck = element.DesiredSize.Height;
if (CurY > _fixedDocument.DocumentPaginator.PageSize.Height - MarginY - extraCheck)
StartPage();
_curCanvas.Children.Add(element);
element.SetValue(Canvas.LeftProperty, CurX);
element.SetValue(Canvas.TopProperty, CurY);
CurX += element.DesiredSize.Width;
if ((flags & ElementFlags.NewLine) == ElementFlags.NewLine)
{
CurX = MarginX;
CurY += element.DesiredSize.Height;
}
}
/// <summary>
/// Add a current style TextBlock element at the current position
/// </summary>
/// <param name="text">Text to add</param>
/// <param name="width">Width of element</param>
/// <param name="height">Height of element</param>
/// <param name="flags">Print options</param>
public void AddTextBlock(string text, double width, double height, ElementFlags flags)
{
TextBlock tb = new TextBlock();
tb.Text = text;
tb.FontFamily = CurrentFontFamily;
tb.FontSize = CurrentFontSize;
tb.FontWeight = CurrentFontWeight;
tb.FontStyle = CurrentFontStyle;
tb.VerticalAlignment = VerticalAlignment.Center;
if ((flags & ElementFlags.HorzCenter) == ElementFlags.HorzCenter)
tb.HorizontalAlignment = HorizontalAlignment.Center;
else if ((flags & ElementFlags.HorzRight) == ElementFlags.HorzRight)
tb.HorizontalAlignment = HorizontalAlignment.Right;
tb.Margin = CurrentElementMargin;
if (CurrentElementForeground != null)
tb.Foreground = CurrentElementForeground;
if (CurrentElementBackground != null)
tb.Background = CurrentElementBackground;
Grid grid = new Grid();
if (CurrentElementBackground != null)
grid.Background = CurrentElementBackground;
if (width != 0)
grid.Width = width;
if (height != 0)
grid.Height = height;
grid.Children.Add(tb);
AddUIElement(grid, flags);
}
/// <summary>
/// Adds a current style TextBox element at the current position
/// </summary>
/// <param name="text">Text to add</param>
/// <param name="width">Width of element</param>
/// <param name="height">Height of element</param>
/// <param name="flags">Print options</param>
public void AddTextBox(string text, double width, double height, ElementFlags flags)
{
TextBox tb = new TextBox();
tb.Text = text;
tb.FontFamily = CurrentFontFamily;
tb.FontSize = CurrentFontSize;
tb.FontWeight = CurrentFontWeight;
tb.FontStyle = CurrentFontStyle;
tb.VerticalAlignment = VerticalAlignment.Center;
tb.VerticalContentAlignment = VerticalAlignment.Center;
if ((flags & ElementFlags.HorzCenter) == ElementFlags.HorzCenter)
tb.HorizontalContentAlignment = HorizontalAlignment.Center;
else if ((flags & ElementFlags.HorzRight) == ElementFlags.HorzRight)
tb.HorizontalContentAlignment = HorizontalAlignment.Right;
tb.Margin = CurrentElementMargin;
if (CurrentElementBackground != null)
tb.Background = CurrentElementBackground;
if (CurrentElementForeground != null)
tb.Foreground = CurrentElementForeground;
Grid grid = new Grid();
if (CurrentElementBackground != null)
grid.Background = CurrentElementBackground;
if (width != 0)
grid.Width = width;
if (height != 0)
grid.Height = height;
grid.Children.Add(tb);
AddUIElement(grid, flags);
}
/// <summary>
/// Add a current style CheckBox element at the current position
/// </summary>
/// <param name="value">Checkbox value to add</param>
/// <param name="width">Width of element</param>
/// <param name="height">Height of element</param>
/// <param name="flags">Print options</param>
public void AddCheckBox(bool value, double width, double height, ElementFlags flags)
{
CheckBox cb = new CheckBox();
cb.IsChecked = value;
cb.VerticalAlignment = VerticalAlignment.Center;
if ((flags & ElementFlags.HorzCenter) == ElementFlags.HorzCenter)
cb.HorizontalAlignment = HorizontalAlignment.Center;
else if ((flags & ElementFlags.HorzRight) == ElementFlags.HorzRight)
cb.HorizontalAlignment = HorizontalAlignment.Right;
if (CurrentElementForeground != null)
cb.Foreground = CurrentElementForeground;
if (CurrentElementBackground != null)
cb.Background = CurrentElementBackground;
Grid grid = new Grid();
if (CurrentElementBackground != null)
grid.Background = CurrentElementBackground;
if (width != 0)
grid.Width = width;
if (height != 0)
grid.Height = height;
grid.Children.Add(cb);
AddUIElement(grid, flags);
}
#endregion Interfaces
}
}