static async Task Main(string[] args)
{
var sourceUrl = "https://developer.mozilla.org/en-US/docs/Web/CSS/@media";
var pdfFilePath = Path.Combine(Directory.GetCurrentDirectory(), "out.pdf");
// The context manages the lifetime of the Chromium browser instance. When started it will start the browser (doing
// a best effort search for the executable if not specified) and connect to its CDP via websocket. When disposed it
// will disconnect from the websocket and kill the browser instance.
using var chromiumExecutionContext = new ChromiumExecutionContext(new ChromiumExecutionOptions()
{
RunHeadless = true
});
await chromiumExecutionContext.StartAsync();
// Navigate to a url. The command returns no result but will wait for the navigation to complete.
var pageNavigationCommand = chromiumExecutionContext.Page.CreateNavigationCommand();
await pageNavigationCommand.ExecuteAsync(sourceUrl);
// Now that the navigation is complete print the page. The command returns the printed page as a base64 string.
var pagePrintToPdfCommand = chromiumExecutionContext.Page.CreatePrintPdfCommand();
var base64Pdf = await pagePrintToPdfCommand.ExecuteAsync();
// Save the file to disk
File.WriteAllBytes(pdfFilePath, Convert.FromBase64String(base64Pdf));
}
public async Task PrintToPdfAsync(string sourceUrl, string pdfFilePath, ChromiumExecutionOptions chromiumExecutionOptions, PrintToPdfOptions options = null)
{
using var chromiumExecutionContext = new ChromiumExecutionContext(chromiumExecutionOptions);
await chromiumExecutionContext.StartAsync();
var pageNavigationCommand = chromiumExecutionContext.Page.CreateNavigationCommand();
await pageNavigationCommand.ExecuteAsync(sourceUrl);
var pagePrintToPdfCommand = chromiumExecutionContext.Page.CreatePrintPdfCommand();
if (options != null)
{
pagePrintToPdfCommand.DisplayHeaderFooter = options.DisplayHeaderFooter;
if (!string.IsNullOrEmpty(options.HeaderTemplate))
{
pagePrintToPdfCommand.HeaderTemplate = options.HeaderTemplate;
}
if (options.UseDefaultFooterTemplate || !string.IsNullOrEmpty(options.FooterTemplate))
{
pagePrintToPdfCommand.FooterTemplate = options.UseDefaultFooterTemplate ? CdpPagePrintPdfCommand.DefaultFooterTemplate : options.FooterTemplate;
}
}
var base64Pdf = await pagePrintToPdfCommand.ExecuteAsync();
File.WriteAllBytes(pdfFilePath, Convert.FromBase64String(base64Pdf));
}
static async Task RunWithRemoteChromium()
{
var sourceUrl = "https://developer.mozilla.org/en-US/docs/Web/CSS/@media";
var pdfFilePath = Path.Combine(Directory.GetCurrentDirectory(), "out.pdf");
// The context manages the lifetime of the remote Chromium browser tab. When started it will start a new tab and connect to its CDP via websocket. When disposed it
// will disconnect from the websocket and close the tab.
using var chromiumExecutionContext = new ChromiumExecutionContext(new ChromiumExecutionOptions()
{
RunHeadless = true, RemoteChromiumUrl = "localhost", InitialUrl = sourceUrl
});
await chromiumExecutionContext.StartAsync();
// Now that the navigation is complete print the page. The command returns the printed page as a base64 string.
var pagePrintToPdfCommand = chromiumExecutionContext.Page.CreatePrintPdfCommand();
pagePrintToPdfCommand.DisplayHeaderFooter = true;
pagePrintToPdfCommand.FooterTemplate = CdpPagePrintPdfCommand.DefaultFooterTemplate;
var base64Pdf = await pagePrintToPdfCommand.ExecuteAsync();
// Save the file to disk
File.WriteAllBytes(pdfFilePath, Convert.FromBase64String(base64Pdf));
}
