private static void RenderHeader(SKCanvas canvas, SKRect bounds, PdfHeader header)
{
int headerHeight = header.Height;
var headerRect = new SKRect(bounds.Left, bounds.Top, bounds.Right, bounds.Top + headerHeight);
var renderer = new HeaderFooterRenderer(header, headerRect);
renderer.Render(canvas);
}
private static void AddHeaderAndFooter(PdfPage page)
{
var header = new PdfHeader(page)
{
LeftText = "Hello",
CenterText = $"{DateTime.Today:MM/dd/yyyy}",
RightText = "World"
};
var footer = new PdfFooter(page)
{
LeftText = $"Page 1",
CenterText = "VER 1.0",
RightText = $"{DateTime.Today:MM/dd/yyyy}"
};
page.PageElements.Add(header);
page.PageElements.Add(footer);
}
public IActionResult Create(string pdfHtmlString, string saveName = null)
{
#region Parameters
// Global Config
string fontFamily = Configuration["PdfConfig:GlobalConfig:FontFamily"];
// Path Config
string descPath = Configuration["PdfConfig:PathConfig:DescPath"];
string logPath = Configuration["PdfConfig:PathConfig:LogPath"];
// MetaData Config
string title = Configuration["PdfConfig:MetaData:Title"];
string author = Configuration["PdfConfig:MetaData:Author"];
string creator = Configuration["PdfConfig:MetaData:Creator"];
string keywords = Configuration["PdfConfig:MetaData:Keywords"];
string subject = Configuration["PdfConfig:MetaData:Subject"];
// Header Config
string headerText = Configuration["PdfConfig:Header:Text"];
float headerFontSize = Convert.ToSingle(Configuration["PdfConfig:Header:FontSize"]);
string headerFontColor = Configuration["PdfConfig:Header:FontColor"];
string headerImageSource = Configuration["PdfConfig:Header:Image:Source"];
float headerImageWidth = Convert.ToSingle(Configuration["PdfConfig:Header:Image:Width"]);
float headerImagePositionX = Convert.ToSingle(Configuration["PdfConfig:Header:Image:Position:Left"]);
float headerImagePositionY = Convert.ToSingle(Configuration["PdfConfig:Header:Image:Position:Top"]);
// Footer Config
string footerText = Configuration["PdfConfig:Footer:Text"];
double footerFontSize = Convert.ToDouble(Configuration["PdfConfig:Footer:FontSize"]);
string footerFontColor = Configuration["PdfConfig:Footer:FontColor"];
string footerImageSource = Configuration["PdfConfig:Footer:Image:Source"];
float footerImageWidth = Convert.ToSingle(Configuration["PdfConfig:Footer:Image:Width"]);
float footerImagePositionX = Convert.ToSingle(Configuration["PdfConfig:Footer:Image:Position:Left"]);
float footerImagePositionY = Convert.ToSingle(Configuration["PdfConfig:Footer:Image:Position:Top"]);
#endregion
#region Properties & Setting
// Configure properties for converter | 配置转换器
ConverterProperties properties = new ConverterProperties();
// Resources path, store images/fonts for example | 资源路径, 存放如图片/字体等资源
string resources = Host.WebRootPath + (osInfo.Platform == PlatformID.Unix ? "/src/font/" : "\\src\\font\\");
// PDF saved path | 生成的PDF文件存放路径
string desc = string.Empty;
if (osInfo.Platform == PlatformID.Unix)
{
if (!Directory.Exists(descPath))
{
Directory.CreateDirectory(descPath);
}
desc = descPath + (saveName ?? DateTime.Now.ToString("yyyyMMdd-hhmmss-ffff")) + ".pdf";
}
else
{
descPath = "D:\\Pdf\\";
if (!Directory.Exists(descPath))
{
Directory.CreateDirectory(descPath);
}
desc = descPath + (saveName ?? DateTime.Now.ToString("yyyyMMdd-hhmmss-ffff")) + ".pdf";
}
FontProvider fp = new FontProvider();
// Add Standard fonts libs without chinese support | 添加标准字体库
// fp.AddStandardPdfFonts();
fp.AddDirectory(resources);
properties.SetFontProvider(fp);
// Set base uri to resource folder | 设置基础uri
properties.SetBaseUri(resources);
PdfWriter writer = new PdfWriter(desc);
PdfDocument pdfDoc = new PdfDocument(writer);
// Set PageSize | 设置页面大小
pdfDoc.SetDefaultPageSize(PageSize.A4);
// Set Encoding | 设置文本编码方式
pdfDoc.GetCatalog().SetLang(new PdfString("UTF-8"));
//Set the document to be tagged | 展示文档标签树
pdfDoc.SetTagged();
pdfDoc.GetCatalog().SetViewerPreferences(new PdfViewerPreferences().SetDisplayDocTitle(true));
//https://developers.itextpdf.com/content/itext-7-examples/converting-html-pdf/pdfhtml-header-and-footer-example
// create pdf font using custom resources | 自定义字体
PdfFont sourcehansanscn = PdfFontFactory.CreateFont(resources + fontFamily, PdfEncodings.IDENTITY_H);
Dictionary <string, object> header = new Dictionary <string, object>()
{
{ "text", headerText },
{ "fontSize", headerFontSize },
{ "fontColor", headerFontColor },
{ "source", Host.WebRootPath + headerImageSource },
{ "width", headerImageWidth },
{ "left", headerImagePositionX },
{ "top", headerImagePositionY }
};
Dictionary <string, object> footer = new Dictionary <string, object>()
{
{ "text", footerText },
{ "fontSize", footerFontSize },
{ "fontColor", footerFontColor },
{ "source", Host.WebRootPath + footerImageSource },
{ "width", footerImageWidth },
{ "left", footerImagePositionX },
{ "top", footerImagePositionY }
};
// Header handler | 页头处理
PdfHeader headerHandler = new PdfHeader(header, sourcehansanscn);
// Footer handler | 页脚处理
PdfFooter footerHandler = new PdfFooter(footer, sourcehansanscn);
// Assign event-handlers
pdfDoc.AddEventHandler(PdfDocumentEvent.START_PAGE, headerHandler);
pdfDoc.AddEventHandler(PdfDocumentEvent.END_PAGE, footerHandler);
// Setup custom tagworker factory for better tagging of headers | 设置标签处理器
DefaultTagWorkerFactory tagWorkerFactory = new DefaultTagWorkerFactory();
properties.SetTagWorkerFactory(tagWorkerFactory);
// Setup default outline(bookmark) handler | 设置默认大纲(书签)处理器
// We used the createStandardHandler() method to create a standard handler.
// This means that pdfHTML will look for <h1>, <h2>, <h3>, <h4>, <h5>, and <h6>.
// The bookmarks will be created based on the hierarchy of those tags in the HTML file.
// To enable other tags, read the folllowing article for more details.
// https://developers.itextpdf.com/content/itext-7-converting-html-pdf-pdfhtml/chapter-4-creating-reports-using-pdfhtml
OutlineHandler outlineHandler = OutlineHandler.CreateStandardHandler();
properties.SetOutlineHandler(outlineHandler);
// Bookmark | 书签
// https://developers.itextpdf.com/content/itext-7-examples/itext-7-bookmarks-tocs/toc-first-page
// https://developers.itextpdf.com/content/best-itext-questions-stackoverview/actions-and-annotations/itext7-how-create-hierarchical-bookmarks
// https://developers.itextpdf.com/content/itext-7-building-blocks/chapter-6-creating-actions-destinations-and-bookmarks
// https://developers.itextpdf.com/examples/actions-and-annotations/clone-named-destinations
// PdfOutline outline = null;
// outline = CreateOutline(outline, pdfDoc, "bookmark", "bookmark");
// Meta tags | 文档属性标签
PdfDocumentInfo pdfMetaData = pdfDoc.GetDocumentInfo();
pdfMetaData.SetTitle(title);
pdfMetaData.SetAuthor(author);
pdfMetaData.AddCreationDate();
pdfMetaData.GetProducer();
pdfMetaData.SetCreator(creator);
pdfMetaData.SetKeywords(keywords);
pdfMetaData.SetSubject(subject);
#endregion
// Start convertion | 开始转化
//Document document =
// HtmlConverter.ConvertToDocument(pdfHtmlString, pdfDoc, properties);
IList <IElement> elements = HtmlConverter.ConvertToElements(pdfHtmlString, properties);
Document document = new Document(pdfDoc);
CJKSplitCharacters splitCharacters = new CJKSplitCharacters();
document.SetFontProvider(fp);
document.SetSplitCharacters(splitCharacters);
document.SetProperty(Property.SPLIT_CHARACTERS, splitCharacters);
foreach (IElement e in elements)
{
try
{
document.Add((AreaBreak)e);
}
catch
{
document.Add((IBlockElement)e);
}
}
// Close and release document | 关闭并释放文档资源
document.Close();
return(Content("SUCCESS"));
}
