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Merge pull request #3 from SyncfusionExamples/logo-update
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Logo update in the HTML to PDF converter Blog tool
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@chinnumuniyappan
chinnumuniyappan authored Sep 23, 2024
2 parents 5bfc7b3 + 4639b71 commit 76bb976
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310 changes: 207 additions & 103 deletions Controllers/HomeController.cs
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using Syncfusion.Pdf.Graphics;
using Syncfusion.Pdf.Interactive;
using Syncfusion.Pdf.Parsing;
using System.ComponentModel;
using System;
using System.Diagnostics;
using System.Net;
using System.Text;
Expand Down Expand Up @@ -38,160 +40,262 @@ public IActionResult Error()
}
public ActionResult ExportToPDF(URL url)
{
//Initialize HTML to PDF converter.
HtmlToPdfConverter htmlConverter = new HtmlToPdfConverter();
if (url.BlogLink != null)
{
//Initialize HTML to PDF converter.
HtmlToPdfConverter htmlConverter = new HtmlToPdfConverter();

//Initialize Blink converter settings.
BlinkConverterSettings blinkConverterSettings = new BlinkConverterSettings();
//Initialize Blink converter settings.
BlinkConverterSettings blinkConverterSettings = new BlinkConverterSettings();

//Enable lazy load images.
blinkConverterSettings.EnableLazyLoadImages = true;
//Enable lazy load images.
blinkConverterSettings.EnableLazyLoadImages = true;

//Set the page size and orientation of the PDF document.
blinkConverterSettings.PdfPageSize = PdfPageSize.A4;
blinkConverterSettings.Orientation = PdfPageOrientation.Landscape;
//Set the page size and orientation of the PDF document.
blinkConverterSettings.PdfPageSize = PdfPageSize.A4;
blinkConverterSettings.Orientation = PdfPageOrientation.Landscape;

//Set the Scale of the PDF document.
blinkConverterSettings.Scale = 1.0f;
//Set the Scale of the PDF document.
blinkConverterSettings.Scale = 1.0f;

//Set the margin of the PDF document.
blinkConverterSettings.Margin.All = 0;
//Set the margin of the PDF document.
blinkConverterSettings.Margin.All = 0;

//Set the JavaScript to remove the unwanted elements from the HTML page.
//Set the JavaScript to remove the unwanted elements from the HTML page.
blinkConverterSettings.JavaScript = "document.getElementById(\"liveChatApp\").remove();\ndocument.getElementById(\"wpfront-scroll-top\").remove();\n document.getElementById(\"top-section\").remove(); \n document.getElementById(\"main-menu-section\").remove(); \n document.getElementById(\"home-page-header\").remove();\n document.getElementById(\"social-icon\").remove(); \n document.getElementById(\"subscription-section\").remove();\n document.getElementById(\"toc-section\").remove();\n document.getElementById(\"category-ad-section\").remove();\n document.getElementById(\"comments-section\").remove();\n document.getElementById(\"cookie\").remove()";
//Set the JavaScript to remove the unwanted elements from the HTML page.
var elementsToRemove = new[]
{
"scroll-progress-bar-container",
"detail-page-secondary-header",
"post-tags-section",
"cookie",
"wpfront-scroll-top",
"top-section",
"main-menu-section",
"subscription-section",
"toc-section",
"category-ad-section",
"comments-section",
"main-footer-policy",
"main-footer-desktop",
"boldchat-host"
};

//Assign the header element to PdfHeader of Blink converter settings.
blinkConverterSettings.PdfHeader = AddHeader(blinkConverterSettings.PdfPageSize, url.HeaderText);
var scriptBuilder = new StringBuilder();
foreach (var element in elementsToRemove)
{
scriptBuilder.AppendLine($"document.getElementById(\"{element}\").remove();");
}

//Assign the footer element to PdfFooter of Blink converter settings.
blinkConverterSettings.PdfFooter = AddFooter(blinkConverterSettings.PdfPageSize);
blinkConverterSettings.JavaScript = scriptBuilder.ToString();

blinkConverterSettings.AdditionalDelay = 20000;
//Assign the header element to PdfHeader of Blink converter settings.
blinkConverterSettings.PdfHeader = AddHeader(blinkConverterSettings.PdfPageSize, url.HeaderText);

//Assign the Blink converter settings to HTML converter.
htmlConverter.ConverterSettings = blinkConverterSettings;
//Assign the footer element to PdfFooter of Blink converter settings.
blinkConverterSettings.PdfFooter = AddFooter(blinkConverterSettings.PdfPageSize, url.BlogLink);

if(url.BlogLink == string.Empty)
{
throw new PdfException("Blog link is empty. Kindly add Blog link in the text box before performing conversion");
}
blinkConverterSettings.AdditionalDelay = 20000;

PdfDocument document = htmlConverter.Convert(url.BlogLink);
//Create memory stream.
MemoryStream stream = new MemoryStream();
//Save and close the document.
document.Save(stream);
document.Close();


//Load the PDF document
PdfLoadedDocument doc = new PdfLoadedDocument(stream);

//Get first page from document
PdfLoadedPage? page = doc.Pages[0] as PdfLoadedPage;

//Create PDF graphics for the page
PdfGraphics graphics = page.Graphics;

// Gets the stream of the Image URL.
Stream receiveStream;
if (url.ImageURL != null)
{
receiveStream = DownloadImage(url.ImageURL);
}
else
{
/* Below URL act as a default URL if TextBox is empty. It can be modified */
receiveStream = DownloadImage("https://www.syncfusion.com/blogs/wp-content/uploads/2023/11/NET-MAUI.png");
}

//Load the image
PdfBitmap image = new PdfBitmap(receiveStream);

// Define the position and size for the image
float x = 570;
float y = 330;
float width = 235;
float height = 245;

// Draw the image on the page
page.Graphics.DrawImage(image, x, y, width, height);

// Define the URL for the hyperlink

string AdURL = string.Empty;

if(url.AdURL != null)
{
AdURL = url.AdURL;
//Assign the Blink converter settings to HTML converter.
htmlConverter.ConverterSettings = blinkConverterSettings;

if (url.BlogLink == string.Empty)
{
throw new PdfException("Blog link is empty. Kindly add Blog link in the text box before performing conversion");
}

PdfDocument document = htmlConverter.Convert(url.BlogLink);
//Create memory stream.
MemoryStream stream = new MemoryStream();
//Save and close the document.
document.Save(stream);
document.Close();


//Load the PDF document
PdfLoadedDocument doc = new PdfLoadedDocument(stream);

//Get first page from document
PdfLoadedPage? page = doc.Pages[0] as PdfLoadedPage;

//Create PDF graphics for the page
PdfGraphics graphics = page.Graphics;

// Gets the stream of the Image URL.
Stream receiveStream;
if (url.ImageURL != null)
{
receiveStream = DownloadImage(url.ImageURL);
}
else
{
/* Below URL act as a default URL if TextBox is empty. It can be modified */
receiveStream = DownloadImage("https://www.syncfusion.com/blogs/wp-content/uploads/2023/11/NET-MAUI.png");
}

//Load the image
PdfBitmap image = new PdfBitmap(receiveStream);

// Define the position and size for the image
float x = 570;
float y = 170;
float width = 235;
float height = 245;

// Draw the image on the page
page.Graphics.DrawImage(image, x, y, width, height);

// Define the URL for the hyperlink

string AdURL = string.Empty;

if (url.AdURL != null)
{
AdURL = url.AdURL;
}
else
{
/* Below URL act as a default URL if AdURL TextBox is empty. It can be modified */
AdURL = "https://www.syncfusion.com/downloads/maui";
}

// Create a hyperlink annotation
PdfUriAnnotation hyperlink = new PdfUriAnnotation(new RectangleF(x, y, width, height), AdURL);
hyperlink.Border = new PdfAnnotationBorder(0); // Set border to 0 for invisible border

// Add the hyperlink annotation to the page
page.Annotations.Add(hyperlink);

// Hex color code for hyperlink color
var color = ConvertHexToRGB("0057FF");
PdfBrush brush = new PdfSolidBrush(color);

for (int i = 0; i < doc.Pages.Count; i++)
{
PdfTextWebLink weblink = new PdfTextWebLink();
weblink.Text = " View blog Link";
weblink.Font = new PdfStandardFont(PdfFontFamily.Helvetica, 8, PdfFontStyle.Bold);
weblink.Brush = brush;
weblink.Url = url.BlogLink;
weblink.DrawTextWebLink(doc.Pages[i].Graphics, new PointF(250, 570));
}

//Creating the stream object
stream = new MemoryStream();
//Save the document as stream
doc.Save(stream);
//Close the document
doc.Close(true);
return File(stream.ToArray(), System.Net.Mime.MediaTypeNames.Application.Pdf, "HTML-to-PDF.pdf");
}
else
{
/* Below URL act as a default URL if AdURL TextBox is empty. It can be modified */
AdURL = "https://www.syncfusion.com/downloads/maui";
return View();
}

// Create a hyperlink annotation
PdfUriAnnotation hyperlink = new PdfUriAnnotation(new RectangleF(x, y, width, height), AdURL);
hyperlink.Border = new PdfAnnotationBorder(0); // Set border to 0 for invisible border

// Add the hyperlink annotation to the page
page.Annotations.Add(hyperlink);

//Creating the stream object
stream = new MemoryStream();
//Save the document as stream
doc.Save(stream);
//Close the document
doc.Close(true);
return File(stream.ToArray(), System.Net.Mime.MediaTypeNames.Application.Pdf, "HTML-to-PDF.pdf");
}
private static PdfPageTemplateElement AddHeader(SizeF pdfPageSize, string headerText)
{
//Create PDF page template element for header with bounds.
PdfPageTemplateElement header = new PdfPageTemplateElement(new RectangleF(0, 0, pdfPageSize.Height, 50));
PdfPageTemplateElement header = new PdfPageTemplateElement(new RectangleF(0, 0, pdfPageSize.Height, 30));
//Create font and brush for header element.
PdfFont font = new PdfStandardFont(PdfFontFamily.Helvetica, 8);
var color = Color.FromArgb(179, 179, 179);
PdfBrush brush = new PdfSolidBrush(color);
if(headerText == string.Empty)
if (headerText == string.Empty)
{
headerText = "Syncfusion Blog";
}

float x = (pdfPageSize.Height / 2) - (font.MeasureString(headerText).Width / 2);
float y = 15 - (font.Height / 2);

// Hex color code for header background color
var color = ConvertHexToRGB("FFFFFF");
PdfBrush brush = new PdfSolidBrush(color);

header.Graphics.DrawRectangle(brush, new RectangleF(0, 0, pdfPageSize.Height, 30));

// Hex color code for header Background stoke color
color = ConvertHexToRGB("E5EDF3");
brush = new PdfSolidBrush(color);

header.Graphics.DrawLine(new PdfPen(color),new PointF(0,30),new PointF(pdfPageSize.Height,30));

//Hex color code for header text color
color = ConvertHexToRGB("475569");
brush = new PdfSolidBrush(color);

//Draw the header string in header template element.
header.Graphics.DrawString(headerText, font, brush, new PointF(200, 20));
header.Graphics.DrawString(headerText, font, brush, new PointF(x, y));

return header;
}

private static PdfPageTemplateElement AddFooter(SizeF pdfPageSize)
private static PdfPageTemplateElement AddFooter(SizeF pdfPageSize, string url)
{
//Create PDF page template element for footer with bounds.
PdfPageTemplateElement footer = new PdfPageTemplateElement(new RectangleF(0, 0, pdfPageSize.Height, 50));
PdfPageTemplateElement footer = new PdfPageTemplateElement(new RectangleF(0, 0, pdfPageSize.Height, 60));
//Create font and brush for header element.
PdfFont font = new PdfStandardFont(PdfFontFamily.Helvetica, 8);
//Create page number field.
PdfPageNumberField pageNumber = new PdfPageNumberField(font, PdfBrushes.Black);
//Create page count field.
PdfPageCountField count = new PdfPageCountField(font, PdfBrushes.Black);
var color = Color.FromArgb(179, 179, 179);

// Hex color code for footer CompositeField text color
var color = ConvertHexToRGB("475569");
PdfBrush brush = new PdfSolidBrush(color);
//Add the fields in composite fields.
PdfCompositeField compositeField = new PdfCompositeField(font, brush, "Page {0} of {1}", pageNumber, count);

float x = pdfPageSize.Height - (font.MeasureString("Page {99} of {99}").Width + 20);
float y = 35;


// Hex color code for footer background color
color = ConvertHexToRGB("FAFBFF");
brush = new PdfSolidBrush(color);

footer.Graphics.DrawRectangle(brush, new RectangleF(0, 0, pdfPageSize.Height,60));

// Hex color code for footer background stoke color
color = ConvertHexToRGB("E5EDF3");
brush = new PdfSolidBrush(color);

footer.Graphics.DrawLine(new PdfPen(color), new PointF(0, 0), new PointF(pdfPageSize.Height, 0));

//Draw the composite field in footer
compositeField.Draw(footer.Graphics, new PointF(250, 20));
compositeField.Draw(footer.Graphics, new PointF(x, y));

FileStream logoImage = new FileStream("wwwroot/images/logo.png", FileMode.Open, FileAccess.Read);

//Draw the logo
PdfBitmap logo = new PdfBitmap(logoImage);
//Draw the logo on the footer
footer.Graphics.DrawImage(logo, new RectangleF(20, 0, 75, 40));

//Hex color code for footer text color
color = ConvertHexToRGB("475569");
brush = new PdfSolidBrush(color);

footer.Graphics.DrawString("Copyright 2001 - Present. Syncfusion, Inc. All Rights Reserved. |", font, brush, new PointF(20, 35));
return footer;
}
public static Stream DownloadImage(string url)
{
using (WebClient client = new())
{
// Set the User-Agent header to mimic a request from a browser
client.Headers.Add("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36");
// Set the User-Agent header to mimic a request from a browser
client.Headers.Add("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36");
byte[] imageBytes = client.DownloadData(url);
return new MemoryStream(imageBytes);
}
}
public static Color ConvertHexToRGB(string hexColor)
{
// Convert hex to integer values for red, green, and blue
int r = int.Parse(hexColor.Substring(0, 2), System.Globalization.NumberStyles.HexNumber);
int g = int.Parse(hexColor.Substring(2, 2), System.Globalization.NumberStyles.HexNumber);
int b = int.Parse(hexColor.Substring(4, 2), System.Globalization.NumberStyles.HexNumber);
return Color.FromArgb(r, g, b);
}
}
}
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