private static async Task SetImageHeaderAsync(string title, PuppeteerPdfOptions pdfOptions)
{
pdfOptions.DisplayHeaderFooter = true;
pdfOptions.HeaderTemplate = await CreateHeaderHtmlAsync(title, pdfOptions);
pdfOptions.FooterTemplate = @"<span></span>";
}
private PuppeteerPdfOptions GetPdfOptionsAsync(PdfOptions options)
{
var pdfOptions = new PuppeteerPdfOptions
{
MarginOptions = new MarginOptions
{
Top = options?.MarginTop ?? _config.MarginTop,
Right = options?.MarginRight ?? _config.MarginRight,
Bottom = options?.MarginBottom ?? _config.MarginBottom,
Left = options?.MarginLeft ?? _config.MarginLeft
},
PrintBackground = options?.PrintBackground ?? _config.PrintBackground
};
if (options?.Format != null)
{
pdfOptions.Format = PdfHelper.ParsePaperFormat(options.Format);
}
else
{
pdfOptions.Width = options?.PaperWidth ?? _config.PaperWidth;
pdfOptions.Height = options?.PaperHeight ?? _config.PaperHeight;
}
return(pdfOptions);
}
private async void btn_SaveAsPDF_Click(object sender, RoutedEventArgs e)
{
//打开网页的操作跟上面是一样的
try
{
await new PuppeteerSharp.BrowserFetcher().DownloadAsync(PuppeteerSharp.BrowserFetcher.DefaultRevision);
var browser = await PuppeteerSharp.Puppeteer.LaunchAsync(new PuppeteerSharp.LaunchOptions
{
Headless = true
});
var page = await browser.NewPageAsync(); //打开一个新标签
await page.GoToAsync(this.tbox_Url.Text); //访问页面
//设置PDF选项
PuppeteerSharp.PdfOptions pdfOptions = new PuppeteerSharp.PdfOptions();
pdfOptions.DisplayHeaderFooter = false; //是否显示页眉页脚
pdfOptions.FooterTemplate = ""; //页脚文本
var width = await page.EvaluateFunctionAsync <int>("function getWidth(){return document.body.scrollWidth}");
var height = await page.EvaluateFunctionAsync <int>("function getHeight(){return document.body.scrollHeight}");
pdfOptions.Width = $"{width}px";
pdfOptions.Height = $"{height}px";
pdfOptions.HeaderTemplate = ""; //页眉文本
pdfOptions.Landscape = false; //纸张方向 false-垂直 true-水平
pdfOptions.MarginOptions = new PuppeteerSharp.Media.MarginOptions()
{
Bottom = "0px", Left = "0px", Right = "0px", Top = "0px"
}; //纸张边距，需要设置带单位的值，默认值是None
pdfOptions.Scale = 1m; //PDF缩放，从0-1
pdfOptions.PrintBackground = true;
var fileName = Environment.CurrentDirectory + $"\\download\\{await page.GetTitleAsync()}.pdf";
if (System.IO.File.Exists(fileName))
{
fileName = fileName.Replace(".pdf", $"{DateTime.Now.ToString("ffff")}.pdf");
}
//保存PDF
await page.PdfAsync(fileName, pdfOptions);
EMessageBox.Show($"{fileName}保存成功");
//在最后记得关闭浏览器及释放资源
browser.Disconnect();
browser.Dispose();
}
catch (Exception ex)
{
EMessageBox.Show(ex.Message);
}
}
private static async Task <string> CreateHeaderHtmlAsync(string title, PuppeteerPdfOptions pdfOptions)
{
var template = await TemplatingHelper.GetTemplateAsync("header.html");
var parameters = new Dictionary <string, string>()
{
{ "title", title },
{ "marginTop", pdfOptions.MarginOptions.Top },
{ "marginRight", pdfOptions.MarginOptions.Right },
{ "marginLeft", pdfOptions.MarginOptions.Left },
};
return(TemplatingHelper.FormatHtml(template, parameters));
}
